safety relays

www.crouzet.com

Safety relaysProtecting the user and the equipment

www.crouzet.com2

To order:Customer Service

Control TechnologiesTel: +44 (0)1256 318900

[email protected]

PAGE

Overview

Overview

Crouzet 4

Custom Sensors & Technologies 5

The basics

Definition of safety relays 6

Range 7

Safety standards

Introduction 8

Selection guide

Machine safety 10

Relevelling control 10

Applications

Examples 12

Technical data

Emergency stop & Safety guard monitoring with 1 channel (screw terminals)

14

Emergency stop & Safety guard monitoring with 1 channel (spring terminals)

14

Emergency stop & Safety guard monitoring with 2 channels (screw terminals)

17

Emergency stop & Safety guard monitoring with 2 channels (spring terminals)

17

www.crouzet.com www.crouzet.com 3

PAGE

Technical data (continued)

Timed contacts (1.0 10 s) 21

Extensions for safety relays 24

Zero speed monitoring 27

Two-hand control with 2 NO outputs 31

Two-hand control with 3 NO outputs + 1 NC output 31

Power supply for 24 VDC safety relays 34

Relevelling zone control for lifts with 2 NO outputs 36

Relevelling zone control for lifts with 2 NO outputs + 1 NC output

36

Safety standards

Highlights 40

Glossary

Terminology 44

To order:Customer Service

Control TechnologiesTel: +44 (0)1256 318900

[email protected]

www.crouzet.com4

Overview

Widely recognised for over 50 years as the specialist in electromechanical, electronic technology and software engineering, Crouzet's experience in time management, physical and mechanical values has resulted in an extensive automation components offer that includes logic controllers, timers, control relays, counters, ratemeters, machine safety equipment, and temperature controllers.

Simple to use, Crouzet products are easy to program and install.

With operations around the globe, Crouzet is constantly monitoring its customers' needs. Its sales teams, technicians and designers combine all their skills to adapt products to customer specifications, both in terms of the application and cost.

Crouzet also ensures that its products are manufactured in compliance with quality and environmental standards (factories certified ISO 9001, 14001 and OHSAS 18001, eco-design).

With its industrial and logistic flexibility, Crouzet is able to deliver products, whether small-scale or mass production items, within the best possible timescale.

In this new catalogue dedicated to safety relays, Crouzet Control Technologies presents:

A new range of 8 safety relay part numbers for "machinery" and "lift" applications.

This new range includes versions with fixed or removable screw terminals and versions with removable spring terminals, thus simplifying installation wiring and maintenance.

In addition to this catalogue, technical data sheets for each product are available as free downloads on the www.crouzet.com website.

Crouzet Automation & Control


Overview

Through its brands, BEI Kimco, BEI Sensors, BEI PSSC, Crouzet, Crydom, Kavlico, Newall and Systron Donner Inertial, CST offers customizable, reliable and efficient components for mission-critical systems in Aerospace & Defence, Transportation, Energy & Infrastructures, Commercial & Industrial OEMs, Medical, Food and Beverage and Building Equipment markets.

Focused on premium value offers and committed to excellence, CST, with 4700 employees worldwide and sales of $660M US in 2011, is the dependable and adaptable partner for the most demanding customers.

Custom Sensors & Technologies is a specialist in sensing, control and motion products

Production

Sales subsidiaries

The Crouzet team worldwide

www.crouzet.com6

The basics

A safety relay

How can it be defined in simple terms?A safety relay is an automation component which is part of a machine's safety system, thus contributing to the safety of people around it.

It is essential for compliance with machine safety standards (EN ISO 13849-1 and IEC/EN 62061).

A safety relay

To execute which actions?

Protecting

Controlling

Monitoring

Sensing

Actuating

Protecting, Controlling

The safety relay protects people. It controls a user's action to ensure that this does not lead to anything that may damage his health, either voluntarily or accidentally.

Monitoring, Sensing

When a machine may be dangerous for the user, it is necessary to monitor all hazardous operations, and detect the slightest anomaly.

Actuating

It is then necessary to actuate safety contacts to stop cutting, rotating, burning items, etc which could be hazardous for the user.



A range covering machine applications: emergency stop and mobile guard monitoring, emergency stop with timed contact, two-hand control, zero speed monitoring, expansion module and power supply accessory. A relevelling control relay for the lift market.

A safety component with one or two channels.

Prohibition of machine starting if a problem becomes apparent through self-checking of the integrity of the control devices.

A range conforming to: - Performance Level (PL) e and

category 4 according to EN ISO 13849-1 - Limit value SIL 3 (SIL CL) according to

IEC/EN 62061

The basics

Crouzet safety relays

A relevelling range and a machine safety range


Their features:

KNA3-YS KSW3-JS

Power supply LED

Power supply LED

Relay output LED

Relay output LED

Error indication LED

www.crouzet.com8

Safety Standards - Introduction

1. PrefaceIt is the aim of every business to improve operational results by increasing productivity. This can be achieved, for example, by increasing automation of workstations or faster cycle times. Research into accidents has proved that this increases the risk potential on workstations, which has ultimately led to increased safety awareness, expressed through national and international standards.

Besides the human aspect, safety improvement measures can also be justified from the business point of view. Assuming that there is no absolute safety even when using technology, there will always remain an element of risk that cannot be excluded. The diagram below illus-trates the relationship between increased safety and the costs of risk financing. It can be seen from the business management aspect that the residual risk is determined by the minimum total cost of increasing safety.

Fig. 1Financing costs of a risk after implementation of safety-improving measures as a function of the level of safety aimed for.Source: Eberhard Franck, Risikobewertung in der Technik, Labor 2000-1991

Any decision on what residual risk can be allowed always requires a risk assessment with an evaluation of potential hazards. This depends on the type and severity of damage as well as the probability of occur-rence. If the minimum requirements cannot be met, the necessary measures must be defined together with specific health and safety at work authorities.Within the scope of product liability, the level of liability for conse-quential losses from faulty products has been significantly extended. In future, this liability can no longer be limited by a contractually restricted warranty in the general conditions of sale. Moreover, conformity with the requirements of the European Machinery Directive is a prerequisite for the sale of machinery on the European market.

For manufacturers and users of machinery and installations, it is not always easy to implement circuitry that meets the abundance of regulations.To support users in implementing safety-related circuits, Crouzet offers switching devices which can be used to create modular solutions tailored to the specific application with respect to functionality and cost.

These include: Emergencystopcircuits Safetyguards Two-handcontrols Zero-speedmonitors

These modules wired ready for connection comply with the applicable national and international standards and regulations and are tested by the bodies responsible for their enforcement if required. Please note that Crouzet has already taken account of the new standards that have recently come into force.

2. Standards and directivesThe creation of the European Unions domestic market has required the elimination of technical trade barriers by standardization of approval conditions.

The Council of the European Union has enacted the Machinery Directive 2006/42/CE, replacing the 98/37/CE directive, in which occupational safety is given high priority.However, the Machinery Directive only defines global safety standards. Individual application of the safety requirements is recommended in standards that have been worked out on the basis of interna-tional standards, i.e. by the European Committee for Electrotechnical Standardization (CENELEC). Successive standards set out theincreasing requirements with respect to complexity and especially quality.

2.1 ScopeThe scope of the European Machinery Directive 2006/42/CE is no longer restricted to industrial machines, as was previously the case, but now covers almost all machines used in the fields of industry, small business and the private sector.

Machines covered by this directive include: Singlemachines Complexplants(interlinkedmachines) Interchangeableequipmentforchangingthefunctionalityofamachine Equipmentwithdrivesystemandmovabledevices Mobilemachinery(e.g.forklifttrucks) Machineryforliftingloads(cranes,liftingdevices) Machineryforliftingortransportingpeople,etc.

Machinery and equipment covered by other European Directives, such as military equipment are excluded.

Increase in safety100%

100%

Residual risk0

Total costs after measures which increasesafety have been implemented

Cost of damage after measures which increase safety have been implemented

Cost of measufres which increase safety

Residual risk costs

Minimumcosts

Savings

Risk fi

nanc

ing co

sts


Safety Standards - Introduction

2.3 New standardsEN 61508Functional safety of safety-related electrical, electronic and program-mable electrical systems. Standard EN 61508 considers technical safety-related functions overthe whole life cycle of a product/system from design to decommis-sioning(probabilisticaspects). It isabasicsafetystandard fromwhichindustry-specific or sector-specific standards are derived, including EN61511forprocessindustry,EN61513fornuclearpowerplantsandIEC/EN62061forthemechanicalengineeringindustry.

IEC/EN 62061SafetyofmachineryFunctional safety of safety-related electrical, electronic and program-mable electrical systems. Application-specific standard for the mechanical engineering industry.

EN ISO 13849-1Safetyofmachinery-Safety-relatedpartsofcontrolsystems-Part1:Generalprinciplesfordesign- Part 2: Validation

EN ISO13849-1 has been replacingEN954-1 since 31/12/2011 andtakes intoaccountconsiderationsofprobabilityas found inEN61508.I.e. technical safety functionality is based on the entire life cycle of a product or system, from its conception to its end of life.

In this standard,deterministic (safety) categoriesare included thatareevaluated by using values such as MTTFd (Mean time to dangerousfailure), DC (Diagnostic coverage) and CCF (CommonCause Failure)andresultinaPL(PerformanceLevel).

The Performance Level (PL) defines the probability of a dangerousfailureperhour (PFHd),which is thegateway to theSILclassificationsof IEC/EN62061. If theoutcomecorresponds to theclass requiredbythe risk assessment, the required safety-related performance will be reached. It isclear thatacategory inEN951canno longerbesimplymapped as a Performance Level. The required safety-related perfor-mance of the relevant safety function is still calculated and determined on the basis of how hazardous an application is. (Risk graph PLrPerformance Level required by EN ISO 13849-1, SIL class IEC/EN62061).

Both EN ISO 13849-1 and IEC/EN 62061 are equally applicable toelectrical systems.EN ISO13849-1 covers amongothersmechanical,hydraulic and pneumatic systems.

2.2 The main standards Machinery Directive 2006/42/CE in remplacement of the 98/37/CE since 29/12/2009

Type EN TitleType A: Basic safety standards

EN ISO 12100 Safety of machinery (former EN 292)

EN ISO 14121 Principles for risk assessment (former EN 1050)

Type B: Safety generic standards

EN 60204-1 Electrical equipment of machinery

EN ISO 13857 Safety of machinery - Safety distances to prevent hazard zones being reached by upper and lower limbs (former EN 294 and EN 811)

Type B1: Safety generic standards for specific machines characteristics

EN ISO 13849-1 Safety-related parts of control systems (former EN 954-1)

IEC/EN 62061 Safety of machinery - Functional safety of safety-related electrical, electronic and programmable electronic control systems

EN ISO 13850 Emergency stop - Principles of design (former EN 418)

Type B2: Safety generic standards for specific devices

EN 574 Two-hand control devices (see also ISO 13851)

EN 61496 Electro-sensitive protective equipment

EN 1088 Interlocking devices associated with guards

Type C: Safety generic standards for machines ranges

EN 692 Mechanical brakes

EN 693 Hydraulic presses

EN 201 Injection moulding machines

EN 12415 Small numerically controlled turning machines and turning centres

EN 12417 Machining centres

EN 13218 Stationary grinding machines

EN 12478 Large numerically controlled turning machines and turning centres

www.crouzet.com10

Selection guide


What are the selection criteria?Machine safety

Function(s) Safety category Safety contacts Data contact Connection Casing width (mm) Supply Part number Type Pages

Emergency stop & Safety guard monitoring with 1 channel

3 3 x NO 1 x NC

Screw terminals

22.5

24 V c 85 102 031

KNA3-YS

14-16

110 V a 85 102 034

230 V a 85 102 035

Removable spring terminals

24 V c 85 103 031

KNAC3-YS110 V a 85 103 034

230 V a 85 103 035

Emergency stop & Safety guard monitoring with 2 channels

4 3 x NO 1 x NCScrew terminals

22.5

24 V z 85 102 436

KNE3-YS17-20

110 - 115 V a 85 102 434

230 V a 85 102 435

Removable spring terminals 24 V z 85 103 436 KNEC3-YS

Timed contacts1 C 10 s 4

2 x NO (instantaneous)1 x NO (timed) - Screw terminals 22.5 24 V z

85 102 736 KZR3-YS 21-23

Expansion module for safety relays

4(combined with

a level 4 safety relay)5 x NO 1 x NC(feedback loop) Screw terminals 22.5

24 V z 85 102 956

KZE5-YS 24-26110 - 115 V a 85 102 954

230 - 240 V a 85 102 955


3 x NO1 x NC

1 x NO2 x solid state outputs Screw terminals 45 24 V c 85 102 331 KSW3-JS 27-30

Two-hand control 4

2 x NO -

Screw terminals 22.5

24 V c 85 102 621 KZH2-Y2

31-333 x NO 1 x NC

24 V c 85 102 631KZH3-YS

24 V a 85 102 632

Power supply for 24 V c safety relays - - - Screw terminals 22.5 85 C 265 V z 85 102 208 KPS0-YS 34-35

Relevelling control according to EN 81-1, -2 (lift standard) Function(s) Safety category Safety contacts Data contact Connection Casing width (mm) Supply Part number Type Pages

Relevelling zone control for lifts 4 2 x NO

-Removable screw terminals 22.5

24 V z 85 102 826 KZHNU-YS36-38

1 x NC 24 V z 85 102 526 KZHNV-YS


Selection guide


What are the selection criteria?Machine safety

Function(s) Safety category Safety contacts Data contact Connection Casing width (mm) Supply Part number Type Pages

Emergency stop & Safety guard monitoring with 1 channel

3 3 x NO 1 x NC

Screw terminals

22.5

24 V c 85 102 031

KNA3-YS

14-16

110 V a 85 102 034

230 V a 85 102 035

Removable spring terminals

24 V c 85 103 031

KNAC3-YS110 V a 85 103 034

230 V a 85 103 035

Emergency stop & Safety guard monitoring with 2 channels

4 3 x NO 1 x NCScrew terminals

22.5

24 V z 85 102 436

KNE3-YS17-20

110 - 115 V a 85 102 434

230 V a 85 102 435

Removable spring terminals 24 V z 85 103 436 KNEC3-YS

Timed contacts1 C 10 s 4

2 x NO (instantaneous)1 x NO (timed) - Screw terminals 22.5 24 V z

85 102 736 KZR3-YS 21-23

Expansion module for safety relays

4(combined with

a level 4 safety relay)5 x NO 1 x NC(feedback loop) Screw terminals 22.5

24 V z 85 102 956

KZE5-YS 24-26110 - 115 V a 85 102 954

230 - 240 V a 85 102 955


3 x NO1 x NC

1 x NO2 x solid state outputs Screw terminals 45 24 V c 85 102 331 KSW3-JS 27-30

Two-hand control 4

2 x NO -

Screw terminals 22.5

24 V c 85 102 621 KZH2-Y2

31-333 x NO 1 x NC

24 V c 85 102 631KZH3-YS

24 V a 85 102 632

Power supply for 24 V c safety relays - - - Screw terminals 22.5 85 C 265 V z 85 102 208 KPS0-YS 34-35

Relevelling control according to EN 81-1, -2 (lift standard) Function(s) Safety category Safety contacts Data contact Connection Casing width (mm) Supply Part number Type Pages

Relevelling zone control for lifts 4 2 x NO

-Removable screw terminals 22.5

24 V z 85 102 826 KZHNU-YS36-38

1 x NC 24 V z 85 102 526 KZHNV-YS

www.crouzet.com12

Control of two-hand control console

Emergency stop modules with 1 or 2 channels

Sensorless control for stopping electric motors

KZH2-YS and KZH3-YS SAFETY RELAYS

KNA3-YS and KNE3-YS, KNAC3-YS and KNEC3-YS

SAFETY RELAYS

SINgLE OR THREE-PHASE KSW3-JS

SAFETY RELAYS

Two-hand control

Emergency stop and guard monitoring

Zero speed monitoring

Levelling the landing and the lift car

KZHNU-YS and KZHNV-YS SAFETY RELAYS

Relevelling lift cars

Applications


Where are they found?

They can be found in electrical cabinets, associated with other automation functions in the following markets:

Building equipment Industrial automation systems


Applications

www.crouzet.com 13


Behind every project, technologies and expertise Local support for all industrial projects.

A multi-skilled team.

A sales presence in over 40 countries.

A Premium offer designed to ensure the excellence of products and services.

Eco-design integrated in Crouzet's "Offer Creation Process".

Certifications: ISO 9001, ISO 14001, OHSAS 18001.

Products which comply with international standards (UL, CSA, EC).

A dynamic R&D department.


www.crouzet.com14

1

Emergency stop module with 1 channel - 22.5 mm - KNA(C)3-YS

"Emergency stop" & "Gate monitoring" functions Single channel operation Security with redundancy and feedback circuit 3 "NO" security contacts 1 "NC" monitoring contact Security category 3 (according to EN 954-1) Performance Level (PL) d, safety category 3 to

EN ISO 13849-1 SIL Claimed Level (SIL CL) 2 to IEC/EN 62061 Terminals : fixed screw terminals or plugin cage clamp

terminals

Type Terminals Voltages Supply frequency range (Hz)

Outputs Code

KNA3-YS Screws 24 Vc - 3 NO + 1 NC 85102031Screws 110 Va 50/60 3 NO + 1 NC 85102034Screws 230 Va 50/60 3 NO + 1 NC 85102035

KNAC3-YS Clamps 24 Vc - 3 NO + 1 NC 85103031Clamps 110 Va 50/60 3 NO + 1 NC 85103034Clamps 230 Va 50/60 3 NO + 1 NC 85103035

Operating characteristicsFunctions Emergency stop

Monitoring of safety gatesOperation 1 channelControl input Manual restart with On-button (Y1 - Y2 terminals)

Automatic restart (Y1 - Y2 linked)Failure detection Between terminal Y1 and commonDisplay of output state by LED Power supply : PWR

Outputs : OUT (relays K1 & K2)SupplySupply voltage 85 102 031 / 85 103 031 : 24 Vc

85 102 034 / 85 103 034 : 110 Va85 102 035 / 85 103 035 : 230 Va

Supply frequency range (Hz) 50 / 60 for AC versionsOperating range a : -15 % / +10 % Un

c : 10 % Un (at 10 % residual ripple) c : - 15 % / +10 % Un (at 48 % residual ripple)

Consumption 1.5 W (24 Vc ) 3.5 VA (230 Va )

Initialization time 0.5 sPrecisionMaximum reset time 40 ms (24 Vc )

200 ms (230 Va )Maximum response time on emergency stop 70 ms (24 Vc )

35 ms (230 Va )Output specificationType Forcibly guided relays (positively driven)Number of safety circuits 3 NONumber of data circuits 1 NFNominal output voltage 250 Va max.Max. thermal current Ith for each contact 5 AMaximum power rating According to AC15 (NO contacts) : 3 A / 230 V a

According to AC15 (NC contacts) : 2 A / 230 VaAccording to DC13 (NO contacts) : 4 A / 24 Vc ; 0.5 A / 110 VcAccording to DC13 (NC contacts) : 4 A / 24 Vc

Electrical endurance At 5 A, 230 Va , cos = 1 : 1.5 x 105 switching cyclesAt 8 A, 24 Vc , according to DC 13 (NO contacts) : 25 x 103 (ON : 0.4 s ; OFF : 9.6 s)

Mechanical life 20 x 106 switching cyclesMaximum rate 600 switching cycles / hProtection against short circuits Max. fuse rating : 10 A gL

Line circuit breaker : B 6 A

New safety relays

Part numbers

General characteristics


Climatic environmentOperating temperature (o C) -15 +55 CStorage temperature (0C) -25 +85 CAltitude < 2000mClimate resistance according to IEC/EN 60068-1 15 / 055 / 04Mechanical environnementVibration resistance according to IEC/EN 60068-2-6 Amplitude : 0.35 mm

Frequency : 10 55 HzElectromagnetic environmentImmunity to electrostatic discharges acc. IEC/EN 61000-4-2 8 kV (air)Immunity to electrostatic fields acc. ENV 50140/204 CEI/EN 61000-4-3 10 V / mImmunity to rapid transient bursts acc. to IEC/EN 61000-4-4 2 kVImmunity to shock waves according to IEC/EN 61000-4-5 Between wires for power supply : 1 kV

Between wires and ground : 2 kVImmunity to radio frequency in common mode acc. to IEC/EN 61000-4-6 10 VInterference suppression according to IEC/EN 55011 Limit value class BHousingMaterial : self-extinguishing (UL94VO) Thermoplastic with V0 extinction behaviourProtection (IEC 60529) - Casing IP40Protection (IEC 60529) - Term. block IP20Mounting DIN-railWeight (g) 200 (24 Vc )

270 (230 Va )Standards and approvalsApprovals CE, TV, UL/CSAEnvironmental directive 2002/95/CE RoHSEnvironmental regulation 1907/2006 ReachSecurity data according to EN ISO 13849-1 Performance Level (PL) : d

Category : 3SIL Claimed Level (SIL CL) to IEC/EN 62061 2Safety Integrity Level (SIL) according to CEI/EN 61508 2Safety category to EN 954-1 3

KNA3-YS - Screw terminals KNAC3-YS - Clamp terminals

Dimensions (mm)

22,5- 00,6+ 118

90

113

121

22,5 - 00,6+

111

118

121

113

www.crouzet.com163

Front face drawing KNA3-YS Contacts Front face drawing KNAC3-YS

A1 (+) : + / LA2 : - / NY1, Y2 : Validation InputY21 (-) : Measure Output (-) of secondary used for example in IT networks for insulation control13, 14, 23, 24, 33, 34 : Safety circuit outputs (forcibly guided NO contacts) 41, 42 : Monitoring output (forcibly guided NC contact)

Safety related data Function diagram

Single channel emergency-stop circuit without feed back loop, with or without automatic restart

Contact reinforcement by external contactors

For automatic restart, terminals Y1 - Y2 must be linked. No ON-pushbutton necessary

For currents > 5 A, the output contacts can be reinforced by external contactors. Functioning of the external contactors is monitored by looping the NC contacts into the start circuit (Y1-Y2)

Connections

Y1

13

Y2

14

23 33 41

24 34 42

Y1

Y2

A1

A2 Y21

K1

K2

13 23 33 41

14 24 34 42

A1(+)

A2(-)

Y21(-)

Principles Curves

EN ISO 13849-1:Category: 3PL: dMTTFd: 180,3 a (year)DC

avg: 99,0 %d

op: 365 d/a (days/year)h

op: 24 h/d (hours/day)tcycle: 3600 s/cycle

1 /h (hour)

IEC EN 62061IEC EN 61508:SIL CL: 2 IEC EN 62061SIL 2 IEC EN 61508HFT*): 1DC

avg: 99,0 %SFF 99,7 %PFHD: 2,60E-10 h-1*) HFT = Hardware failure tolerance

K1 Relay

K2 Relay

Emergencystop (Off)

Pushbutton(On)

Applications

emergencystop

A2(-)

A1(+)

Y21(-)

KNA(C)3-YS

2313

2414

33 41

34 42

on

L1(+)

N(-)

Y1 Y2

L1(+)

N(-)

A2(-)

A1(+)

KNA(C)3-YS

2313

2414

33 41

34 42

K3 K4

K3

K4

Y21(-)

emergencystop on

Y1 Y2


1

Emergency stop modules with 1 or 2 channels (22.5 mm) - KNE(C)3-YS

"Emergency stop" & "Safety gates monitoring" functions

Single and 2-channel operation Security with redundancy and feedback circuit 3 "NO" security contacts 1 "NC" monitoring contact Security category 4 (according to EN 954-1) Performance Level (PL) e, safety category 4

to EN ISO 13849-1 SIL Claimed Level (SIL CL) 3 to IEC/EN 62061 Terminals : fixed screw terminals or plugin cage clamp

terminals


Outputs Code

KNE3-YS Screws 24 Vz 50/60 3 NO + 1 NC 85102436Screws 110-115 Va 50/60 3 NO + 1 NC 85102434Screws 230 Va 50/60 3 NO + 1 NC 85102435

KNEC3-YS Clamps 24 Vz 50/60 3 NO + 1 NC 85103436


Safety gates monitoringOperation 1 or 2 channelsControl input Manual restart with On-button (Y1 - Y2 terminals)

Automatic restart (switch S2 & Y1 - Y2 linked)Failure detection Monitored start on On-button

With or without cross fault monitoring in the emergency-stop loop (switch S1)

Display of output state by LED Power supply : PWROutput : OUT1 (relay K1) Output : OUT2 (relay K2)

SupplySupply voltage 85 102 436 / 85 103 436 : 24 V z

85 102 434 : 110-115 Va85 102 435 : 230 Va

Supply frequency range (Hz) 50 / 60Operating range z : 10 % Un

a : -15 % +10 % UnConsumption 1.5 W (24 Vc )

3.7 VA (230 Va )Initialization time 250 msPrecisionMaximum reset time 30 ms (manual start)

350 ms (automatic start)Maximum response time on emergency stop 150 ms (z )

50 ms (a )Output specificationType Forcibly guided relays (positively driven)Number of safety circuits 3 NONumber of data circuits 1 NCNominal output voltage 250 V AC max.Max. thermal current Ith for each contact 8 AMaximum power rating According to AC15 (NO contacts) : 3 A / 230 V a


Electrical endurance At 5 A, 230 Va , cos = 1 : 1.5 x 105 switching cyclesAt 8 A, 24 Vc , according to DC 13 (NO contacts) : 25 x 103 switching cycles (ON : 0.4 s ; OFF : 9.6 s)


Line circuit breaker : B 6 A

New safety relays

Part numbers


www.crouzet.com18 2

Climatic environmentOperating temperature (o C) -15 +55Storage temperature (0C) -25 +85Altitude < 2000 mClimate resistance according to IEC/EN 60068-1 15 / 055 / 04Mechanical environnementVibration resistance according to IEC/EN 60068-2-6 Amplitude : 0.35 mm

Frequency : 10 55 HzElectromagnetic environmentImmunity to electrostatic discharges acc. IEC/EN 61000-4-2 8 kV (air)Immunity to electrostatic fields acc. ENV 50140/204 CEI/EN 61000-4-3 10 V / mImmunity to rapid transient bursts acc. to IEC/EN 61000-4-4 2 kVImmunity to shock waves according to IEC/EN 61000-4-5 Between wires for power supply : 1 kV (a ), 0.5 kV (24 V z )

Between wires and ground : 2 kVImmunity to radio frequency in common mode acc. to IEC/EN 61000-4-6 10 VInterference suppression according to IEC/EN 55011 Limit value class BHousingMaterial : self-extinguishing (UL94VO) Thermoplastic with V0 extinction behaviourProtection (IEC 60529) - Casing IP40Protection (IEC 60529) - Term. block IP20Mounting DIN-railWeight (g) 210 (24 Vz )

275 (230 Va )Standards and approvalsApprovals CE, TV, UL / CSAEnvironmental directive 2002/95/CE RoHSEnvironmental regulation 1907/2006 ReachSecurity data according to EN ISO 13849-1 Performance Level (PL) : e


KNE3-YS - Screw terminals KNEC3-YS - Clamp terminals

Dimensions (mm)

22,5- 00,6+ 118

90

113

121

22,5 - 00,6+

111

118

121

113


Front face drawing KNE3-YS Contacts Front face drawing KNEC3-YS

A1 (+) : + / LA2 : - / NY1, Y2 : Validation InputY11, Y21, Y12, Y22 : Control Inputs13, 14, 23, 24, 33, 34 : Safety circuit outputs (forcibly guided NO contacts) 41, 42 : Monitoring output (forcibly guided NC contact)


Connections

Y1

A1+

Y11

A2

Y2

13

Y12

14

41

23

Y21

24

42

33

Y22

34

Y12Y22Y1Y2

A1+ Y11

A2 Y21

K1

K2

13 23 33 41

14 24 34 42

Principles Curves

EN ISO 13849-1:Category: 4PL: eMTTFd: > 100 a (year)DC

avg: 99,0 %d



1 /h (hour)

IEC/EN 62061IEC/EN 61508:SIL CL: 3 IEC/EN 62061SIL 3 IEC/EN 61508HFT*): 1DC


Pushbutton(On)

Emergencystop (Off)

K1 Relay

K2 Relay

www.crouzet.com20 4

Single channel emergency stop circuit 2-channel emergency stop circuit without cross fault monitoring

Contact reinforcement by external contactors controlled by one contact path

This circuit does not have any redundancy in the emergency-stop control circuit.S1 : no cross fault detectionS2 : automatic start

S1 : no cross fault detectionS2 : manual start

S1 : no cross fault detectionS2 : automatic start

2-channel safety gate monitoring Contact reinforcement by external contactors, 2-channel controlled

2-channel emergency stop circuit with cross fault monitoring

S1 : no cross fault detectionS2 : manual start

For currents > 8 A, the output contacts can be reinforced by external contactors. Functioning of the external contactors is monitored by looping the NC contacts into the start circuit (Y1-Y2)

S1 : cross fault detectionS2 : manual start

Applications

off

L1

N

E-stop

A2(-)

A1(+) Y11 Y1 Y2 Y12 Y22

Y21

S1, S2: Switches

KNE(C)3-YS

13

14

.. ..

.. ..

L1

N

E-stop

A2(-)

A1(+) Y11 Y1 Y2 Y12 Y22

Y21

KNE(C)3-YS

13

14

.. ..

.. ..

on

S1, S2: Switches

L1

N

E-stop

A2(-)

A1(+) Y11 Y1 Y2 Y12 Y22

Y21

KNE(C)3-YS

13

14

.. ..

.. ..

K4

K4 K5

K5

S1, S2: Switches

L1

N

A2(-)

A1(+) Y11 Y1 Y2 Y12 Y22

Y21

KNE(C)3-YS

13

14

.. ..

.. ..

on

sliding guard closed

Activated NO contact(contact position: closed)

S1, S2: Switches

L1

N

E-stop

A2(-)

A1(+) Y11 Y1 Y2 Y12 Y22

Y21

KNE(C)3-YS

13 23

14 24

..

..

K4

K4 K5

K5

on

S1, S2: Switches

L1

N

E-stop

A2(-)

A1(+) Y11 Y1 Y2 Y12 Y22 Y21

KNE(C)3-YS

13

14

....

....

on

S1, S2: Switches


1

Delayed Emergency Stop Module (22.5 mm) - KZR3-YS

"Emergency stop" & "Safety gates monitoring" functions

1- or 2-channel operation Security with redundancy and feedback circuit 2 instantaneous "NO" security contacts 1 release delayed "NO" security contact Release delay of 1.0 10s for security contacts Performance Level (PL) e, safety category

4 to EN ISO 13849-1 SIL Claimed Level (SIL CL) 3 to IEC/EN 62061


Outputs Code

KZR3-YS Screws 24 Vz 50/60 (2 NO) I + (1 NO) T 85102736


Safety gates monitoringRelease delay of security contacts (1.0 to 10 s)

Operation 1 or 2 channelsControl input Manual restart with On-button (Y1 - Y2 terminals)

Automatic restart (Y13 - Y2 linked)Failure detection Monitored start on On-button if Y1 - Y2 linked

With or without cross fault monitoring in the emergency-stop loop (depending on connections)

Display of output state by LED Supply voltage : PWROutput : OUT1 (relay K1) Output : OUT2 (relay K2) Output : OUT1t (relay K1t) Output : OUT2t (relay K2t)

SupplySupply voltage 85 102 736 : 24 VzSupply frequency range (Hz) 50 / 60Operating range 10 % UnConsumption 3.5 WInitialization time 1 sPrecisionMaximum reset time 25 ms (manual start)

100 ms (automatic start)Maximum response time on emergency stop 20 ms (supply disconnection)

10 ms (disconnection in Y12 - Y22 - Y32)Output specificationType Forcibly guided relays (positively driven)Number of safety circuits 2 instantaneous NO

1 release delayed NONominal output voltage 250 Va max.Max. thermal current Ith for each contact 13 / 14 ou 23 / 24 : 8 A

37 / 38 : 6 AMaximum power rating According to AC 15 (NO contacts) : 3 A / 230 Va

According to DC 13 (NO contacts) : 3 A / 24 Vc (ON : 0.4 s ; OFF : 9.6 s)Electrical endurance At 2 A, 230 Va , according to AC 15 : 105 switching cyclesMechanical life 10 x 106 switching cyclesMaximum rate 360 switching cycles / hProtection against short circuits Max. fuse rating : 10 A gL (for contacts 13 - 14 ou 23 - 24)

4 A gL (for contacts 37 - 38) Line circuit breaker : B 6 A

Climatic environmentOperating temperature (o C) -15 +55Storage temperature (0C) -25 +85Altitude < 2000 mClimate resistance according to IEC/EN 60068-1 15 / 055 / 04Mechanical environnementVibration resistance according to IEC/EN 60068-2-6 Amplitude : 0.35 mm

Frequency : 10 55 Hz

New safety relays

Part numbers


www.crouzet.com22 2

Electromagnetic environmentImmunity to electrostatic discharges acc. IEC/EN 61000-4-2 8 kV (air)Immunity to electrostatic fields acc. ENV 50140/204 CEI/EN 61000-4-3 10 V / mImmunity to rapid transient bursts acc. to IEC/EN 61000-4-4 2 kVImmunity to shock waves according to IEC/EN 61000-4-5 Between wires for power supply : 1 kV

Between wires and ground : 2 kVImmunity to radio frequency in common mode acc. to IEC/EN 61000-4-6 10 VInterference suppression according to IEC/EN 55011 Limit value class BHousingMaterial : self-extinguishing (UL94VO) Thermoplastic with V0 extinction behaviourProtection (IEC 60529) - Casing IP40Protection (IEC 60529) - Term. block IP20Mounting DIN-railWeight (g) 210Standards and approvalsApprovals CE, TV, UL / CSAEnvironmental directive 2002/95/CE RoHSEnvironmental regulation 1907/2006 ReachSecurity data according to EN ISO 13849-1 Performance Level (PL) : e


Screw terminals

Front face drawing Contacts

A1 (+) : + / LA2 : - / NY1, Y2 : Validation InputY12, Y21, Y11, Y22, Y13, Y32 : Control Inputs13, 14, 23, 24 : Safety circuit outputs (instantaneous forcibly guided NO contacts) 37, 38 : Safety circuit output (release delayed forcibly guided NO contact)

Dimensions (mm)

22,5- 00,6+ 118

90

113

121

Connections

K1

K1t

K2

K2t

13 23 37

Y12Y13Y22Y32Y1Y2

Y21 14 24 38

A1(+) Y11

A2(-)

Y1

A1+

Y11

A2

Y2

37

Y12

38

Y13

13

Y21

14

Y32

23

Y22

24



Single channel emergency stop circuit 2-channel emergency stop circuit 2-channel safety gate monitoring

This circuit does not have any redundancy in the emergency-stop control circuit.

With cross fault monitoring

Contact reinforcement by external contactors controlled by one contact path

Contact reinforcement by external contactors, 2-channel controlled

Y1 - Y2 must stay open on auto start For currents > 5 A, the output contacts can be reinforced by external contactors. Functioning of the external contactors is monitored by looping the NC contacts into the start circuit Y13-Y2 or Y1 - Y2.

Principles Curves

EN ISO 13849-1:Category: 4PL: eMTTFd: 215,1 a (year)DC

avg: 99,0 %d



1 /h (hour)

IEC EN 62061IEC EN 61508:SIL CL: 3 IEC EN 62061SIL 3 IEC EN 61508HFT*): 1DC


Relay

Relay

Relay

Relay

Applications

off

L1(+)

N(-)

Emergencystop

A2(-)

A1(+) Y11 Y1 Y2 Y12 Y32

Y21 Y22

KZR3-YS

on

13

14

.. ..

.. .. Y11 Y32

L1(+)

N(-)

Emer

genc

ysto

p

A2(-)

A1(+) Y11 Y1 Y2 Y12 Y22 Y21

KZR3-YS

13

14

....

....

onactive NO-contact(contact position closed)

sliding protectiongrid closed

on

Y22

L1(+)

N(-)

A2(-)

A1(+) Y11 Y1 Y2 Y12 Y32

Y21

KZR3-YS

13

14

.. ..

.. ..

S1

S2

K5K4

Y13 Y2

Auto Start :

13

14

K5K4

L1(+)

(-)N

EmergencyStop

A2(-)

A1(+) Y11 Y2Y1 Y1 2 Y32

on

K5

K4

.. ..

.. ..Y21 Y22

KZR3-YS

K5K4

L1(+)

N(-)

13 23

14 24

..

..Y11 Y32

KZR3-YS

A1(+)

A2(-)

Emer

genc

ysto

p

Y11 Y1 Y2 Y12 Y22 Y21

on

K5

K4

www.crouzet.com241

Extension module (22.5 mm) - KZE5-YS

"Multiplication of contacts" function for safety relays 1- or 2-channel operation Security with redundancy and feedback circuit 5 "NO" security contacts Performance Level (PL) e, safety category 4

to EN ISO 13849-1 SIL Claimed Level (SIL CL) 3 to IEC/EN 62061


Outputs Code

KZE5-YS Screws 24 Vz 50/60 5 NO 85102956Screws 110-115 Va 50/60 5 NO 85102954Screws 230-240 Va 50/60 5 NO 85102955

Operating characteristicsFunctions Multiplication of the number of contacts for safety relaysOperation 1 or 2 channelsReturn loop X1 - X2Display of output state by LED Output : OUT1 (relay K1)

Output : OUT2 (relay K2)SupplySupply voltage 85 102 956 : 24 Vz

85 102 954 : 110-115 Va85 102 955 : 230-240 Va

Supply frequency range (Hz) 50 / 60Operating range a : - 15 / + 10 % Un

c : 10 % Un (at 10 % residual ripple) c : - 15 / + 10 % Un (at 48 % residual ripple)

Consumption 1.8 VA (24 Vz ) 3.0 VA (110, 230 Va )

PrecisionMaximum reset time 20 msMaximum response time on emergency stop 35 msOutput specificationType Forcibly guided relays (positively driven)Number of safety circuits 5 NONominal output voltage 250 Va max.Max. thermal current Ith for each contact 5 AMaximum power rating According to AC15 (NO contacts) : 3 A / 230 Va


Electrical endurance At 5 A, 230 Va , cos = 1 : > 1.5 x 105 switching cyclesAt 8 A, 24 Vc , according to DC 13 (NO contacts) : > 25 x 103 switching cycles (ON : 0.4 s ; OFF : 9.6 s)


Line circuit breaker : B 6 AClimatic environmentOperating temperature (o C) -15 +55Storage temperature (0C) -25 +85Altitude < 2000 mClimate resistance according to IEC/EN 60068-1 15 / 055 / 04Mechanical environnementVibration resistance according to IEC/EN 60068-2-6 Amplitude : 0.35 mm

Frequency : 10 55 HzElectromagnetic environmentImmunity to electrostatic discharges acc. IEC/EN 61000-4-2 8 kV (air)Immunity to electrostatic fields acc. ENV 50140/204 CEI/EN 61000-4-3 10 V / mImmunity to rapid transient bursts acc. to IEC/EN 61000-4-4 4 kVImmunity to shock waves according to IEC/EN 61000-4-5 Between wires for power supply : 1 kV (a ), 0.5 kV (24 Vz )

Between wires and ground : 4 kVImmunity to radio frequency in common mode acc. to IEC/EN 61000-4-6 10 V

New safety relays

Part numbers



Interference suppression according to IEC/EN 55011 Limit value class BHousingMaterial : self-extinguishing (UL94VO) Thermoplastic with V0 extinction behaviourProtection (IEC 60529) - Casing IP40Protection (IEC 60529) - Term. block IP20Mounting DIN-railWeight (g) 205Standards and approvalsApprovals CE, TV, UL/CSAEnvironmental directive 2002/95/CE RoHsEnvironmental regulation 1907/2006 ReachSecurity data according to EN ISO 13849-1 Performance Level (PL) : e


Screw terminals


A1 (+) : + / LA2 : - / NX1, X2 : Feedback circuit (forcibly guided NC contact) 13, 14, 23, 24, 33, 34, 43, 44, 53, 54 : Safety circuit outputs (forcibly guided NO contacts)

Dimensions (mm)

22,5- 00,6+ 118

90

113

121

Connections

13 23 33 43 53 X1

14 24 34 44 54 X2

K1

A1

A3

A4

A2

K2

A1(+)

13 23 4333

53 54

A3(+) X1 X2

14 24 4434

A2

A4

www.crouzet.com263

Safety related data

Multiplication of the contacts of a KNE (C) 3-YS module with a KZE5-YS module

Principles

Applications

A1(+)

A2(-)

A2(-) A4(-)

A1(+) A3(+)

13

13

23

23 33 43

..

..Y1 Y2 14

14

24

24 34 44

X1 X2

On

L1

N

Emergency-stop

KNE(C)3-YS

KZE5-YS

Y12 Y22 21Y11

53

54


1

Standstill monitor (45 mm) - KSW3-JS

Function "Stillstand detection without sensors" Independent of rotation direction Security with redundancy and feedback circuit 3 forcibly guided "NO" security contacts 1 forcibly guided "NC" security contact 1 "NO" monitoring contact 2 semiconductor monitoring outputs Performance Level (PL) e, safety category 4

to EN ISO 13849-1 SIL Claimed Level (SIL CL) 3 to IEC/EN 62061


Outputs Code

KSW3-JS Screws 24 Vc - 3 NO + 1 NC 85102331

Operating characteristicsFunctions Standstill detection on motors without sensorsReturn loop Y1, Y2Failure detection Broken wire detection in measure circuitDisplay of output state by LED Power supply : PWR (green = operation, red = internal error)

Output : OUT (yellow = e.m.f. > Uan, green flashes = time progression of tS, permanent green = output contacts enabled) Error : ERR (flashing codes)

SupplySupply voltage 85 102 331 : 24 VcOperating range 10 % UnConsumption 3 WPrecisionRelease delay for detection of running motor < 100 msStandstill time delay 0.2 6 adjustableOutput specificationType Forcibly guided relays (positively driven)Number of safety circuits 3 NONumber of data circuits 1 NCNominal output voltage 250 Va max.Max. thermal current Ith for each contact 5 AMaximum power rating According to AC15 (NO contacts) : 3 A / 230 Va at 40 C

According to AC15 (NC contacts) : 2 A / 230 Va at 40 CAccording DC13 (NO contacts) : 2 A / 24 Vc at 40 CAccording to DC13 (NC contacts) : 2 A / 24 Vc at 40 C

Electrical endurance For 5 A, 230 Va , cos = 0.5 : > 2 x 105 switching cyclesMechanical life 50 x 106 switching cyclesMaximum rate 1200 switching cycles / hProtection against short circuits Max. fuse rating : 4 A gL

Line circuit breaker : C 6 AClimatic environmentOperating temperature (o C) -25 +60Storage temperature (0C) -40 +75Altitude < 2000 mClimate resistance according to IEC/EN 60068-1 25 / 060 / 04Mechanical environnementVibration resistance according to IEC/EN 60068-2-6 Amplitude : 0.35 mm

Frequency : 10 55 HzElectromagnetic environmentImmunity to electrostatic discharges acc. IEC/EN 61000-4-2 8 kV (air)Immunity to electrostatic fields acc. ENV 50140/204 CEI/EN 61000-4-3 20 V / mImmunity to rapid transient bursts acc. to IEC/EN 61000-4-4 2 kVImmunity to shock waves according to IEC/EN 61000-4-5 Between wires for power supply : 2 kV (a - UH), 1 kV (24 Vc )

Between measuring input L1 / L2 / L3 : 2 kVImmunity to radio frequency in common mode acc. to IEC/EN 61000-4-6 10 VInterference suppression according to IEC/EN 55011 Limit value class BHousingMaterial : self-extinguishing (UL94VO) Thermoplastic with V0 extinction behaviourProtection (IEC 60529) - Casing IP40

New safety relays

Part numbers


www.crouzet.com28 2

Protection (IEC 60529) - Term. block IP20Mounting DIN-railWeight (g) 400Standards and approvalsApprovals CE, TV, UL/CSAEnvironmental directive 2002/95/CE RoHSEnvironmental regulation 1907/2006 ReachSecurity data according to EN ISO 13849-1 Performance Level (PL) : e

Catgorie : 4SIL Claimed Level (SIL CL) to IEC/EN 62061 3Safety Integrity Level (SIL) according to CEI/EN 61508 3Safety category to EN 954-1 4

Screw terminals


L1, L2, L3 : Connection to monitored motor11, 12 : Safety circuit output (forcibly guided NC contact) 23, 24, 33, 34, 43, 44 : Safety circuit outputs (forcibly guided NO contacts) 53, 54 : Monitoring output (NO contact) Y1, Y2 : Connection of feedback circuit (for external contactors) Y2, Y3 : Manual reset for external faultsA1+, A2 : Auxiliary supply (UH) A3+, A4 : Supply for semiconductor outputsON : Semiconductor output indicated state of safety contactsERR : Semiconductor output indicates failures

Dimensions (mm)

121

118

9035

45

113

Connections

Y1 11

53

12

A3+ A1

Y2 23

L2

24

A4 A2

Y3 33

54

34

ON

43

L1 L3

44

ERR

11 23 33 43 53 A3+

ON ERR24 34 44 54 A412

K1

K2



With 3-phase motor With single-phase motor

Typical connection combination with star delta timer Typical connection combination with star delta timer

Principles Curves

EN ISO 13849-1:Category: 4PL: eMTTFd: 93 a (years)DC

avg: 99,0 %d


op: 24 h/d (hours/day)tcycle: 28,8E+03 s/cycle

1 /8 h (hours)



A3-ERR

23-2433-3443-4453-54A3-ON

A1/A2

HU

stop

rese

tY3-

Y2

rese

t Y3-

Y2

line

brea

kage

line

brea

kage

stan

dstil

ldet

ecte

dm

otor

runs

down

mot

orru

nsdo

wn

Mot

orEi

n

mot

oron

auxil

iary

volta

geon

L1/L2/L3

L1/L2/L3

motor speed /voltage

line breakage

start up delay time UHt =2...2,5sE

voltage levelUan

standstill delay time ts

tE tE

11-12

t

Applications

L1 L2 L3PE

K4 K5

L1

L2

L3

Y1

Y2

Y3

KSW3-JS

M3~

-

+

23 33 4311 A3+ A4A1+

24 34 4412 ON ERRA2-

K4

K5

motor contactor

24 Vc

53

54

N LPE

K4 K5

L1

L2

L3

Y1

Y2

Y3

KSW3-JS

M1~

-

+

23 33 4311 A3+ A4A1+

24 34 4412 ON ERRA2-

K4

K5

motor contactor

53

54

24 Vc

off

on

fuse

main switch

d = star delta timerN = mains contactor

= star-contactor= triangle contactor

L1L2L3

N

F

F

N

M3~

N R

18

A1

A2

28

15

K4 K5

Y1

Y2KSW3-JS

TQR6 Crouzet (ref. 85865176)

23 33 L2L1 L3A1

24 34A2

K4

U1

W2

V1

U2

W1

V2

K5

N

N R

+

-

24 Vc

off

on

fuse

d = star delta timerN = mains contactor

= star-contactor= triangle contactor

With 3-phase connection of KSW3-JS, the star contactorhas to be closed after the motor is switched off to detect standstill.If this is not the case the failure signal broken wire blocksthe output contacts in off posisition.

main switch

L1L2L3

N

F

N

N

M3~

N R

18

A1

A2

28

15

K4 K5

Y1

Y2KSW3-JS

23 33 L2L1 L3A1

24 34A2

K4

U1

W2

V1

U2

W1

V2

K5

F

N

R

N

( )

TQR6 Crouzet (ref. 85865176)

+

-

24 Vc

www.crouzet.com30 4

Typical connection combination with E-stop

A1

On

K4

K4

F2

Y11 Y12 Y22 13 23 33 41

Y21 Y1 Y2 14 24 34 42 A2

Unlock

F1

Off

Stand Still Monitor

KSW3-JS

Open

EmergencyStop

L1

K4

L2

L3

N

Emergency Stop Module

KNE(C)3-YS

A1+ 11

12ON ERR A4A3+

53

54

23

24

43

44

Y1

Y2

A2-

33

34

L1 L2 L3

Signal lamp

*

*Signal toProgrammableLogic Controller

* optional

M3

+24V E0 E1 ...

ProgrammableLogic Controller

24 Vc+

-


1

Two-hand safety relays (22.5 mm) - KZH2-YS & KZH3-YS

"Two-hand" safety function in with two push buttons Inputs for two switches with double contacts

(1 NO and 1 NC for each) Security with redundancy and feedback circuit Monitoring of external contactors with feedback

circuit Y1 - Y2 3 "NO" security contacts & 1 "NC" monitoring contact

(KZH3-YS version) 2 "NO" security contacts (KZH2-YS version) Performance Level (PL) e, safety category 4

to EN ISO 13849-1 SIL Claimed Level (SIL CL) 3 to IEC/EN 62061 Safety Level Type III-C according to EN 574


Outputs Code

KZH2-YS Screws 24 Vc - 2 NO 85102621KZH3-YS Screws 24 Vc - 3 NO + 1 NC 85102631

Screws 24 Va 50 / 60 3 NO + 1 NC 85102632

Operating characteristicsFunctions Protection of people with two-hand pushbuttonsReturn loop Y1 - Y2Failure detection Overvoltage and short circuit protectionDisplay of output state by LED Power supply : PWR

Output : OUT1 (relay K1) Output : OUT2 (relay K2)

SupplySupply voltage 85 102 621 / 85 102 631 : 24 Vc

85 102 632 : 24 VaSupply frequency range (Hz) 50 / 60 (for AC version)Operating range 10 % UnConsumption 2.3 W (c )

4 VA (a )Initialization time 1 sPrecisionMaximum reset time 30 msMaximum response time on emergency stop 25 msOutput specificationType Forcibly guided relays (positively driven)Number of safety circuits 2 NO (KZH2-YS)

3 NO (KZH3-YS)Number of data circuits 1 NC (KZH3-YS)Nominal output voltage 250 Va max.Max. thermal current Ith for each contact 5 AMaximum power rating According to AC15 (NO contacts) : 3 A / 230 Va

According to AC15 (NC contacts) : 2 A / 230 VaAccordinf to DC13 (NO contacts) : 4 A / 24 Vc ; 0.5 A / 110 VcAccording to DC13 (NF contacts) : 4 A / 24 Vc

Electrical endurance For 5 A, 230 Va , cos = 1 : > 1.5 x 105 switching cyclesFor 8 A, 24 Vc , according to DC 13 (NO contacts) : > 25 x 103 switching cycles (ON : 0.4 s ; OFF : 9.6 s)


Line circuit breaker : B 6 AClimatic environmentOperating temperature (o C) -15 +55Storage temperature (0C) -25 +85Altitude < 2000 mClimate resistance according to IEC/EN 60068-1 15 / 055 / 04

New safety relays

Part numbers


www.crouzet.com32 2

Mechanical environnementVibration resistance according to IEC/EN 60068-2-6 Amplitude : 0.35 mm


Between wires and ground : 2 kVImmunity to radio frequency in common mode acc. to IEC/EN 61000-4-6 10 VInterference suppression according to IEC/EN 55011 Limit value class BHousingMaterial : self-extinguishing (UL94VO) Thermoplastic with V0 extinction behaviourProtection (IEC 60529) - Casing IP40Protection (IEC 60529) - Term. block IP20Mounting DIN-railWeight (g) 220Standards and approvalsApprovals CE, TVEnvironmental directive 2002/95/CE RoHSEnvironmental regulation 1907/2006 ReachSecurity data according to EN ISO 13849-1 Performance Level (PL) : e

Category : 4SIL Claimed Level (SIL CL) to IEC/EN 62061 3Safety Integrity Level (SIL) according to CEI/EN 61508 3Safety category to EN 954-1 4Safety Level according to EN 574 Type III-C

Screw terminals

Front face drawing KZH2-YS Contacts Front face drawing KZH3-YS

Dimensions (mm)

22,5- 00,6+ 118

90

113

121

Connections

Y1 Y2

Y11

13

Y12(+)

A2(-)

Y22(-)

A1(+)

14

41*23

Y21

24 42*

33*

34*

Y11Y21Y1Y2

A1 Y12

A2 Y22

K1

K2

13 23 33* 41*

14 24 34* 42*

* : only for KZH3-YS version

A1 (+) : + / LA2 : - / NY1, Y2 : Feedback circuit inputY11, Y12, Y21, Y22 : Control inputs (push buttons) 13, 14, 23, 24, (33, 34) * : Safety circtui outputs (forcibly guided NO contacts) (41, 42) * : Monitoring output (forcibly guided NC contact) :* only for KZH3-YS version



Two-hand safety relay Two-hand control with contact reinforcement via external positively-driven contactors

When switching inductive loads, spark absorbers are recommended

Principles Curves

EN ISO 13849-1:Category: 4PL: eMTTFd: 30,7 a (year)DC

avg: 99,0 %d


op: 12 h/d (hours/day)tcycle: 1,40E+02 s/cycle



max.0,5s >0,5s

UUN

Y1/Y2

S1

S2

23-24

13-14

A1/A2t

1.) "S1, S2 activated" means, NC open and NO closed2.) activated S1, switches "+"-potential3.) activated S2, switches "-"-potential

Applications

Button 1

Button 2

L1 (+)

N (-)

A2(-)

A1(+) Y12

Y22

Y22

Y12

Y11

Y21

KZH2-YS / (KZH3-YS)

13

14

(33)23 (41)

(34)24 (42)

Y1 Y2

Button1

Button2

K1 K2

L1 (+)

N (-)

A2(-)

A1(+)

K1 K2

Y2 Y12

Y22

Y22

Y12

Y11

Y21

KZH2-YS / (KZH3-YS)

13

14

(33)23 (41)

(34)24 (42)

Y1

www.crouzet.com341

Power supply AC / DC to DC 24 V (22.5 mm) - KPS0-YS

Possibility of 110 Va and 230 Va power supply of 24 Vc safety relays

Input : universal voltage range 85 265 Vz Output : secondary voltage 24 Vc / 200 mA High efficiency (80 %) Protection class II, according to EN 61 558-1


Outputs Code

KPS0-YS Screws 85 265 Vz24 Vc

50 / 60 - 85102208

Operating characteristicsFunctions Universal Power supply for 24 Vc Safety RelaysFailure detection Short circuit and overload protectionDisplay of output state by LED Power supply : Us (secondary voltage)SupplySupply voltage 85 102 208 : 85 265 Va / 85 300 VcSupply frequency range (Hz) 50 / 60Output specificationType Secondary voltage 24 Vc 5 %Max. thermal current Ith for each contact 200 mAProtection against short circuits Electronic fuseClimatic environmentOperating temperature (o C) -20 +50Altitude < 2000 mClimate resistance according to IEC/EN 60068-1 20 / 050 / 04Mechanical environnementVibration resistance according to IEC/EN 60068-2-6 Amplitude : 0.35 mm

Frequency : 10 55 HzElectromagnetic environmentImmunity to electrostatic discharges acc. IEC/EN 61000-4-2 8 kV (air)Immunity to electrostatic fields acc. ENV 50140/204 CEI/EN 61000-4-3 10 V / mImmunity to rapid transient bursts acc. to IEC/EN 61000-4-4 4 kVImmunity to shock waves according to IEC/EN 61000-4-5 Between wires for power supply : 1 kVImmunity to radio frequency in common mode acc. to IEC/EN 61000-4-6 10 VHousingMaterial : self-extinguishing (UL94VO) Thermoplastic with V0 extinction behaviourProtection (IEC 60529) - Casing IP40Protection (IEC 60529) - Term. block IP20Mounting DIN-railWeight (g) 125Standards and approvalsApprovals CEEnvironmental directive 2002/95/CE RoHSEnvironmental regulation 1907/2006 ReachProtection class II according to EN 61 558-1 II

New safety relays

Part numbers



Screw terminals


A1 (+), A2 : Primary voltageUs+, Us- : Secondary voltage

24 V c Two-hand safety relay supplied with 110 or 230 V a

This wiring is only valid for 24 Vc or 24 V z safety relays

Dimensions (mm)

22,5- 00,6+ 118

90

113

121

Connections

A1(+) A2

Us+

Us+

Us-

Us-

A1

A2

Us+

Us-

Applications

L1 (+)

N (-)

A2

A1(+)

KPS0-YS

US+

US-

US+

US-

85...265 V AC / DC

24 V DC

Button 1

Button 2

A2

A1+ Y12

Y22

Y22

Y12

Y11

Y21

KZH2-YS / (KZH3-YS)

13

14

(33)23 (41)

(34)24 (42)

Y1 Y2

www.crouzet.com36

1

Relevelling Zone Check (22.5 mm) - KZHNU-YS & KZHNV-YS

"Relevelling Zone Check" function Single and 2-channel operation Security with redundancy and feedback circuit 2 "NO" security contacts 1 "NC" monitoring contact (only for KZHNV-YS

version) Performance Level (PL) e, safety category 4 to

EN ISO 13849-1 SIL Claimed Level (SIL CL) 3 to IEC/EN 62061 Lift Directive 95/16/EC Lift Standard EN 81-1, -2 Removable terminal strips


Outputs Code

KZHNU-YS Screws 24 Vz 50/60 2 NO 85102826KZHNV-YS Screws 24 Vz 50/60 2 NO + 1 NF 85102526

Operating characteristicsFunctions Readjustment of elevator cabin position (while the doors are open on load

charge for example)Operation 1 or 2 channelsControl input Manual restart with On-button (Y1 - Y2 terminals)

Automatic restart (switch S2 & shunt between Y1 - Y2)Failure detection Line fault detection on On-button (monitored start)

With or without cross fault monitoring in the emergency-stop loop (switch S1)

Display of output state by LED Power supply : PWROutput : OUT1 (relay K1) Output : OUT2 (relay K2)

SupplySupply voltage 85 102 526 / 85 102 826 : 24 VzSupply frequency range (Hz) 50 / 60Operating range z : 10 % Un (at 10 % residual ripple)

z : -15 / + 10 % Un (at 48 % residual ripple)Consumption 2 WInitialization time 250 msPrecisionMaximum reset time 40 ms (manual start)

250 ms (automatic start)Maximum response time on emergency stop 50 ms (supply disconnection)

15 ms (disconnection in Y12 - Y22)Output specificationType Forcibly guided relays (positively driven)Number of safety circuits 2 NONumber of data circuits 1 NC (for KZHNV-YS version)Nominal output voltage 160 Va max.Max. thermal current Ith for each contact 5 AMaximum power rating According to AC15 (NO contacts) : 3 A / 160 Va

According to AC15 (NC contacts) : 2 A / 160 VaAccording to DC13 (NO contacts) : 2 A / 24 VcAccording to DC13 (NF contacts) : 2 A / 24 Vc

Electrical endurance At 2 A, 230 Va , according to AC 15 : 105 switching cyclesAt 8 A, 24 Vc , according to DC 13 (NO contacts) : 105 switching cycles (ON : 0.4 s ; OFF : 9.6 s)


Line circuit breaker : C 8 AClimatic environmentOperating temperature (o C) -15 +55Storage temperature (0C) -25 +85Altitude < 2000 mClimate resistance according to IEC/EN 60068-1 15 / 055 / 04

New safety relays

Part numbers



Mechanical environnementVibration resistance according to IEC/EN 60068-2-6 Amplitude : 0.35 mm


Between wires and ground : 2 kVImmunity to radio frequency in common mode acc. to IEC/EN 61000-4-6 10 VInterference suppression according to IEC/EN 55011 Limit value class BHousingMaterial : self-extinguishing (UL94VO) Thermoplastic with V0 extinction behaviourProtection (IEC 60529) - Casing IP40Protection (IEC 60529) - Term. block IP20Mounting DIN-railWeight (g) 220Standards and approvalsApprovals CE, TVEnvironmental directive 2002/95/CE RoHSEnvironmental regulation 1907/2006 ReachSecurity data according to EN ISO 13849-1 Performance Level (PL) : e

Category : 4SIL Claimed Level (SIL CL) to IEC/EN 62061 3Safety Integrity Level (SIL) according to CEI/EN 61508 3Safety category to EN 954-1 4Aufzugsnorm EN 81-1, -2

Screw terminals

Dimensions (mm)

121

118

84

22,5

35

www.crouzet.com383

Front face drawing KZHNU-YS Contacts Front face drawing KZHNV-YS

A1 (+) : + / LA2 : - / NY1, Y2 : Validation inputY11, Y21, Y12, Y22 : Control inputs13, 14, 23, 24, (33, 34) * : Safety circuit outputs (forcibly guided NO contacts) (41, 42) * : Monitoring output (forcibly guided NC contact) * : only for KZHNV-YS version


Relevelling Zone Check

S2 : automatic start

Connections

13

A1

Y21

Y1

Y22

Y2

A2

14

23

Y11

24

Y12

41*

42*

K2

K1

Y21

A1 Y11

Y1

Y12Y22

Y2

A2

2313

2414

41*

42*

* : only for KZHNV-YS version

Principles Curves

EN ISO 13849-1:Category: 4PL: eMTTFd: > 100 a (year)DC

avg: 99,0 %d



1 /h (hour)



SwitchS1

SwitchS2

RelayK1

RelayK2

Outputs13-1423-24

Automatic Start

Applications

L1

N

SPos 1 SPos2

A2(-)

A1(+) Y11 Y1 Y2 Y12 Y22 Y21 13 .. ..

14 .. ..

KZHNU-YS / KZHNV-YS

S1, S2: Switches



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Products which comply with international standards (UL, CSA, EC).

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In addition to this catalogue, the www.crouzet.com website offers the latest tools, available as free downloads, including technical data sheets and installation manuals for each product.

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Safety Standards - Highlights

1. Safety-related switching functionsThe standards mentioned in the introduction describe the main requi-rements for safety-related switching circuits. The following is an extract from them.

1.1 Emergency stop circuitsIn order to achieve quick stopping of dangerous movement in emergency situations, reliable operation of the emergency stop device is crucial. Therefore, appropriate circuits must prevent failures of devices downstream of an emergency stop device or a properly functioning protection device.

EN 60204-1 Safety of machinery Electrical equipment

Actions in an emergency (emergency isolation or emergency stop)EN ISO 13850 describes the design principles for emergency stopequipment. Emergency isolation and emergency stopping are complementary protective measures for minimizing risks on machines (see EN ISO 12100). Emergency isolation relates to the actualoperation of a machine, while emergency stop is directly related to switching on/off. They are initiated by a single main action and must be maintained effective up to a manual reset action at the location where the incident occurred, along with the control commands initiated by them. Resetting only enables the machine, it does not switch it on, or restart it. This must be performed as a separate operation.

Emergency isolation [EN ISO 13850]Emergency isolation must operate in compliance with stop categories 0 or1dependingontheriskassessmentcarriedoutforthemachine.Thefollowing applies in addition to the requirements for stopping:- Priority over all other functions and operations in all operating modes.- Interruption of the power supply to machine drives that may cause

a hazardous situation must occur without further hazards either immediately (stop category 0) or in a controlled way as soon aspossible(stopcategory1).

Emergency stopThis is the disconnection of the corresponding power supply using an electromechanical switching device (stop category 0). If stop category0 is not allowed for the machine, other measures such as protection against direct contact may be required. An emergency stop must be provided when danger or damage is possible and protection against direct contact can only be achieved by distance or placing obstacles upstream of the electrical supply.

Stop functionsThere are three categories:- Stop category 0: Uncontrolledstop:by immediate interruptionof thepowersupply (to

themotordrivecomponents).- Stop category 1: Controlled stop, the power supply is maintained to allow the machine

to stop and is then interrupted.- Stop category 2: Controlled stop, with the power supply maintained.

1.2 StopTheStopfunctionsintheabovecategoriesmustbeselectedasaresultof a risk assessment and the machine requirements. If necessary, facilities for connecting guards and interlocks must be provided.Resetting the stop function must not lead to a hazardous situation. If required according to the risk assessment, stop commands must be available for each workstation.

1.3 Control functions in fault situationsGeneral requirementsDepending on the risk level of the individual application, appropriate measures must be taken when failures or malfunctions may cause hazardous situations or damage to the machine or production materials.Electrical control circuits must be created with an adequate safety performance level determined by a risk assessment of the machine. The requirements of IEC/EN62061 and/orEN ISO13849-1must then beapplied.

Riskreductionispossiblebymeansof(butnotlimitedto):- Protective equipment on the machine- Safetyinterlockingoftheelectricalcircuit- Providing redundancy or diversity in part or completely- Running operational tests

Hazardous situations due to a power failure or loss of memory content, i.e. removing batteries, must be prevented.Unauthorized or accidental changes to the memory content must be prevented by appropriate methods, i.e. use of a key, etc.

Use of partial or complete redundancyThe use of redundancy can minimize the chance of a single fault resulting in a dangerous situation. When used in normal operation it is referred to as online redundancy. A design where specific circuits perform the safety function only when the operational function fails is referred to as offline redundancy. When offline redundancy is provided which is not effective during operation, precautions must be taken to ensure that these circuits will activate when required.



Use of diversityControl circuits with different operating principles or the combination of different components and devices can reduce the probability of hazards due to faults and/or failures. These include, but are not limited to:- NC-NOcombinations,actuatedbyinterlockedsafetydevices- Use of control components of different design- A combination of electromechanical and electrical equipment in

redundant systemsCombinationsofelectricalandnon-electricalsystems(e.g.mechanical,hydraulic, pneumatic) can perform the redundant function and ensurediversity.

1.4 Two-hand controlIn ISO 13851, three types of two-hand control are defined for usedepending on the likely risk:

Type I:Notsuitablefortheinitiationofdangerousoperations:- Two control devices, simultaneous actuation by both hands- Continuous simultaneous actuation during the dangerous operation- Stoppingofmachineoperationwhenoneorbothcontroldevicesare

released and the dangerous situation is still present

Type II:As type I, but both control devices must be released before the machine can be restarted.

Type III:As type II, but simultaneous actuation must be as follows:- Controldevicesmustbeactuatedwithin0.5seconds.- If this time is exceeded, both control devices must be released before

the machine can be restarted.

1.5 EN 13850: Safety of machinery Emergency stop, principles for design

Emergency stop function- Prevents the occurrence of hazards (to persons, to machines and

productionmaterials)orminimizesthosealreadypresent- Must be initiated by a single action by one person

Emergency stop device- Manually actuated control device for initiating an emergency stop

function

General requirementsThe emergency stop must be available and operational at all times and must have priority over other functions and operations in all machine operating modes, but without affecting devices provided for rescuing trapped persons.Nostart commandmustbeable toaffectan initiatedemergencystopfunction until the emergency stop function has been manually reset.The emergency stop function should be designed as a complementary protective measure and must not be a substitute for protective measures or other safety functions, nor affect their efficiency.

Depending on the risk assessment, the emergency stop function must be designed so that - after actuation of the emergency stop device - dangerous movements and machine operations are stopped in an appropriate way without causing further hazards and without intervention by any person.

Suchmethodsmayinclude:- Selectionofanoptimumtimedelay- SelectionoftheStopcategory- Application of a defined stopping sequence

An emergency stop must be designed so that the decision to actuate it does not require anyone to consider the effects resulting from this.After initiating an emergency stop device/command, the effect must be maintained until it is manually reset. A reset must only be performed at the location where the emergency stop command is issued and restarting must only be possible after a manual reset at this location.

TheStopcategoryof theemergencystopmustbeselectedaccordingto the risk assessment for the machine.

Stopcategory0:Stoppingby:- Immediate interruption of the power supply to the machine drive

components- Mechanical separation (decoupling) between dangerous parts and

theirdrivecomponents(bybrakingifnecessary)

Stopcategory1:Controlled stopping with power supply to the machine drive components in order to achieve a stop, then - after the machine has stopped - interruption of the power supply. Interruption of the power supply may include:- Disconnecting the power supply to the machines electric motors- Disconnecting movable parts of the machine from the source of

mechanical energy- Cutting off hydraulic/pneumatic power sources to a piston/plunger

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2. Functional safety - principles for design

2.1 General points

Required safety-related performanceTheserequirementshavebeenmodifiedbystandardsENISO13849-1which replaces EN 954-1 (obsolete since 31/12/2011) and IEC/EN62061; theyhavebeencalculatedanddefined in theformofasystemand risk analysis. For each detected danger, a safety function including validation is specified. These standards also provide support tools for defining the required safety integrity.

Application of standards EN ISO 13849-1 or IEC/EN 62061

ENISO13849-1: - Also for non-electric systems, i.e. mechanical, hydraulic, etc. - For specific architectures -Categories ( EN 954-1) are maintained, additional probability

components result in the PL (Performance Level) in the givencategory, thus different performance levels are possible for each category

IEC/EN62061: - For all electrical and electronic systems - All architectures - Breaking down of the safety-related electrical control system into

safety-relatedcontrolfunctionsandinterpretationoftheSILclassifi-cation (SafetyIntegrityLevel)

Determination of the required safety integrityResult of the risk analysis = required system safetySafetyfunctionswithassociatedSafetyPerformance: ENISO13849-1: Riskgraph,result=PLrpersafetyfunction IEC/EN62061: Risk assessment and safety measures form Result=SILofthesafetymeasurementperunitofrisk

Risk parameters

S - Severity of injury S1-Slight(normallyreversible)injury S2-Serious(normallyirreversible)injury,includingdeath

F - Frequency and/or duration of exposure to hazard F1-Seldomtolessoftenand/orexposedtimeisshort F2 - Frequent to continuous and/or exposed time is long

P - Possibility of avoiding the hazard or limiting damage P1-Possibleunderspecificconditions P2-Scarcelypossible

Preferred category for reference points

Possible categories that require additional measures

OMeasuresthatmaybeoversizedfortheriskconcerned


B 1 2 3 4

Category selection

S1

S2

F1

F2

P1

P2

P1

P2

Risk graph according to EN 954-1: 1997, Annex B

2.2 Risk assessment and selection of an appropriate category

2.2.1 Standard EN 954-1


2.2.2 Standard EN ISO 13849-1

ThePLisdeterminedbyevaluatingthefollowingaspects: Quantitative: - MTTFd - DC - CCF -Safety related part of the central system. Other parameters can

have an influence, i.e. specification level, test cycles, etc. Qualitative: - Behaviour of safety functions under fault conditions - Ability to perform the safety functions under foreseeable environ-

mental conditions, etc.

Definitions of sub- category

CategoryB(PLa,b): - Usually single-channel - CCF not relevant - A single failure results in loss of the safety function

Category1(PLc): -SatisfiescategoryB - A single failure results in the loss of the safety function, but the

probability for this is lower than for category B

Category2(PLa,b,c,d): -SatisfiescategoryB - Test of functionality at appropriate time intervals - In the event of failure, initiation of a safe condition with at least

signalling of a fault -MeasuresagainstCCF(e.g.diversity) - Test itself must not cause any danger - A failure between tests may result in the loss of the safety function,

but is detected during the test.

Category3(PLb,c,d): -SatisfiescategoryB - Measures against CCF - A single failure does not result in the loss of the safety function and

must be detected before a new request if possible - An accumulation of non-detected failures can result in loss of the

safety function

Category4(PLe): -SatisfiescategoryB - Measures against CCF - A single failure does not result in loss of the safety function. It

must be detected before a new request or the accumulation of unrecognised failures does not result in loss of the safety function.

- Failures are detected in good time to prevent the loss of the safety function.

- An accumulation of unrecognised failures is taken into account.

Note:Forproductswithahighqualitativevalue,reliabilitycanleadtoaPLefor a category 3 structure.

New risk graph in standard EN ISO 13849-1

S1

1

F1

F1

P1

PLr

P1

P1

P1

F2

F2

P2

P2

P2

P2

S2

a

b

c

d

e

low risk

high risk

Risk parameters

S - Severity of injury S1-Slight(normallyreversibleinjury S2-Serious(normallyirreversible)injury,includingdeath

F - Frequency and/or duration of exposure to hazard F1-Seldomtolessoftenand/orexposedtimeisshort F2 - Frequent to continuous and/or exposed time is long

P - Possibility of avoiding the hazard or limiting damage P1-Possibleunderspecificconditions P2-Scarcelypossible

a,b,c,d,e Safety-relatedPerformanceLeveldesignations

The risk assessment allows the manufacturer to optimise the basic safety- related requirements for the machine-specific data depending on the machine operating conditions.

Both the manufacturer and the user are responsible for interpreting the risk correctly.Quantitative determination of the risk is difficult. For this reason, theacceptable risk can be determined within a wide range when it comes to selecting the category.

This clarifies why we select F2 - Frequent to continuous rather than F1 -Seldom to lessoften for the riskparameterF -Frequencyandexposuredurationintheriskgraph(seefigure).Thereisawiderangeof safety levels between the assessments less often and frequent.

3. Further safety measureCut-off delayFor controlled stopping according to stop category 1, it may beadvisable to have a cut-off delay, e.g. a motor braking function designed to stop a dangerous movement quickly.


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Glossary

Terminology

B B10dNumber of cycles until 10% of the components have faileddangerously (for pneumatic and electromechanical components).[ENISO13849-1]

Basic deviceEvaluation unit that includes all basic functions required in safety systems as a minimum to generate a safety-related output signal.

C CategoryClassification of safety-related parts of a control system with respect to their resilience to faults (B, 1, 2, 3, and 4) andbehaviour during faults. This classification derives from the structural arrangement of the parts and/or their reliability [EN954-1,seealsoENISO13849-1].

CCFCommon Cause FailureFailure of different units following a single event, with the failures not being caused by one another.

Concurrency controlConcurrency control of signal transmitters by the safety-related evaluation unit is used to increase the functional safety of the protective safety device. It monitors signal changes in the signal transmitters for a specified time - the synchronous monitoring time. If this time is exceeded, no enable signal will be issued. Concurrency control is required for several safety devices (Two-handcontrols,forexample).

Cross-circuit faultShort-circuit between the input channels of an emergency stopmodule.NOTE:Thistypeofshort-circuitcanonlyoccurwithmulti-channelcontrols.

Cross-circuit fault detectionThis is the ability of a safety relay to go into a defined safe condition either immediately or as a part of a cyclical check, after the fault has been detected.

D DC Diagnostic CoverageRatio between the failure rate of detected dangerous incidents and the failure rate of all dangerous incidents.

Discrepancy controlTolerates lack of synchronization of related signals in the same assembly during a defined time window.Note1:ThetermConcurrencycontrolisalsoused.Note 2: The signal transmitters are monitored to increasefunctional safety. This consists of checking the signal change over a specified time.If this time is exceeded, no enable signal will be issued. This type of control is required for some safety systems (e.g. two-handcontrols).

Door guardMonitors the state of position sensors on an isolating switch. It generates a safety-related output signal when the door is closed.

E Emergency stopShutdownintheeventofanemergency.Emergency stop buttons Signaltransmitters.

Emergency stop deviceAn emergency stop device is an arrangement of components to perform the emergency stop function.(EN13850/EN60947-5-5/EN60204-1)

F Fault tolerance timeTime interval during which the process can receive incorrect control signals without a hazardous state occurring.

Feedback loopMonitors controlled actuators.NOTE:TheSRECScanonly beactivatedwhen the feedbackloop is closed. Feedback for relays or contactors, for example, is via positively-driven contacts. Normally closed contacts areconnected in series and integrated in the feedback loop of the SRECS.Ifacontactisweldedintheenablecircuit,thenitwillnolongerbepossibletoreactivatetheSRECSbecausethefeedbackloop remains open.

First fault occurrence time:This is the time interval during which the probability of a safety-critical first fault occurring in the relevant requirement class is sufficiently low. The time interval starts at the moment when the relevant system was in a fault-free state as defined for the relevant category.NOTE:Measurestoeliminatefaultsarenottakenintoaccountatthis stage.

FITFailure in TimeDescribes the failure rate of technical components, especially electronic components. The FIT indicates the number of components that fail within 109 hours. Statistically, componentshaving a high FIT value fail more frequently than those having a lower FIT value. Failure rate for a FIT value = 1/109 hoursmeansonceinapprox.114,000years.

Failure rateFailure rate of a component expressed in FIT.

totalFailure rate totalFailure rate of the device expressed in FIT.

M MTTFd(MeanTimeTodangerousFailure)Average running time before dangerous failure.


Glossary

O Occurrence time for multiple faults:This is the time interval during which the probability of a combination of safety-critical multiple faults occurring is sufficiently low for the relevant requirement class. The time interval starts at the moment when the relevant system was in a fault-free state as defined for the relevant category.

Output expansion module SRECS unit that can only be used in connection with a basic device in order to increase the number of outputs.Outputexpansion modules are included in the cyclical self-check.

P PFDProbability of Failure on Demand = probability of a safety function not being executed on demand.

PFHdProbability of Dangerous Failure per Hour.The failure threshold PFD is used for low failure rates, while the failure threshold PFH is used for high or continuous failure rates.

PLPerformance LevelDiscrete level of safety-related capability.PLaisthelowestandPLethehighestlevel[ENISO13849-1].

PLr

Performance Level requiredPLapplied toobtain thenecessaryriskreduction foreachsafetyfunction.

Position controlControls the position of a guard (i.e. protective door) using a Signaltransmitterandinterpretationunit.

Positively-driven contactsPositively-drivenmeans thatnoNCcontactmayclose ifanyNOcontact isnotopen.Also,noNOcontactmayclosewhenanNCcontact is not open. Example:IfanNOcontactiswelded,alltheotherNCcontactsofthe relay/contactor concerned remain open no matter whether the relay/contactor is energised or not.

Positive openingContact opening as a direct result of a defined movement of aswitchsoperatingelementusingnon-sprungparts[EN60204-1].NOTE1:Forelectricalequipmentonmachinery,positiveopeningofNCcontacts is expressly required for all safety circuits. NOTE2:According to EN 60947-5-1-k, positive opening is designated bythesymbol(arrowinacircle)(protectionofpersonsfunction).

R RedundancyThe availability of more devices or systems than necessary for a function.NOTE: Several functional groups are used for the samefunction (i.e. multi-channel structure). In particular in safetyengineering, this means the duplication of critical components [ENISO12100-2].

ResetResetting to a defined condition.

Restart inhibitThe restart inhibit prevents an SRECSfrom issuinganenablesignal after a failure, change of machine operating mode or change of the actuation type.NOTE:Therestart inhibit isonlyremovedbyanexternalcommand(e.g. Resetpushbutton).

RiskThe combination of probability that damage will occur and the extentofthedamage[ENISO12100-1].NOTE:Severityof thedamage,exposure toahazard,probabilityof occurrence and lack of fallback procedures are all influencing factors[ENISO14121].

Risk assessmentThis is the evaluation of safety-related requirements taking account of the extent of damage, probability of occurrence and risk classif

safety relays

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