SKF Multilog On-line System DMx CMMA 9910/CMMA 9920

Universal distributed vibration monitor

The SKF Multilog On-line System DMx provides distributed vibration based machinery protection and condition monitoring in a single device, for use in both conventional and hazardous areas.

4-channel•Intrinsically safe•Integral eddy current probe drivers•Reduced installation costs•

SKF Reliability Systems – class leaders in condition monitoring, have joined forces with intrinsic safety experts Pepperl+Fuchs to develop the SKF Multilog On-line System DMx.

The SKF Multilog DMx offers a 4-channel vibration monitoring solution that for the first time allows the requirements of critical machinery monitoring, from transducer to dynamic data processing, to be fulfilled by an intrinsically safe device located on the machine skid.

Protection and condition monitoring

The SKF Multilog DMx provides two distinct vibration monitoring capabilities in the same module:

Machine protection• measurements to react to a vibration alarm that may signify a looming catastrophic failure, in compliance with the API 670 standard.Condition monitoring• measurements to be used by sophisticated software to predict a potential catastrophic failure.

Intrinsic safety

The complexity of vibration measurements has previously forced the monitoring electronics into the safe area. The SKF Multilog DMx takes the step into the Zone 1 hazardous area. This breakthrough allows the benefits of distributed modularity – enjoyed by process IO and transmitter systems – to be extended to fully featured vibration monitoring.

The low power consumption requirements of intrinsically safe devices also provide energy savings when compared to control room monitor racks.

Reliability

A reliable machine shutdown command is a prerequisite, and the SKF Multilog DMx offers Functional Safety compliant PFD data to IEC 61508 (SIL levels).

Reduced installation costs

When compared to the traditional control room architecture, distributing modular vibration monitors at each machine across the plant provides cost savings from:

Modularity and configurability•The selection and configuration of the vibration monitor stays in the scope of the machine package, without need to interface at a sensor level with instrumentation outside that package.

Field cabling•The many multi-pair cables between machine and control/instrument room, carrying analogue signals, are replaced with single or dual-pair communications cables carrying digital data. A significant reduction in copper costs is realized.

Instrument room space•Costly cabinets can be eliminated. Semi-populated 19” monitor racks are no longer required to achieve safety system segregation.

Installation man-hours•Physical loop-checking of many hundreds of sensor points on a plant can be reduced to a few data link chains, saving significant man-hours for the machine manufacturer, LSTK contractor, and the end user maintenance team.

FeaturesDigital technology processing

Combined machine protection and analysis capabilities.•Typical applications are for vibration, thrust or pressure •monitoring (any engineering units possible).Vector data. Up to four user programmable amplitude and phase •vectors per channel.Overall level data.•Dynamic data – FFT and time waveform.•Steady-state and transient machine operation.•All configuration data is held on board the module, no •pre-knowledge or database look-up required.Multi-configuration storage capability advantageous to OEMs.•Configuration data is stored in non-volatile memory and restored •on power-up.Sophisticated and flexible alarming capability, any logical •combination of measurements allowed.Multiple LEDs for local indication of module, channel and alarm •status and diagnostic data.Integrated self test and calibration features, potentiometer free.•Storage of individual names/tags for channels, alarms, •tachometer and configuration sets.

Transducer systems

On-board digital eddy current probe drivers, which can be •configured to accommodate a range of probe types, cable lengths and target materials.Built-in barriers for direct connection to Zone 0 mounted sensors •Ex [ia] IIC.Universal inputs: dynamic and position measurements (any •combination) within the same module.Fully configurable for any engineering units, transducer sensitivity •or any filter cut-off frequencies.Independent transducer power supply circuits for each channel.•

Communications

Dual redundant, intrinsically safe, RS 485 links.•Both links support transfer of any data type: status, level, analysis •data or configuration.Single master, multiple slave protocol with message CRC.•Fast messaging scheme for shutdown commands, dynamic •module control and data acquisition.Duplicate terminals for serial communications and transducer •inputs to ease wiring congestion.

2

SKF Distributed system advantageNew technology reduces installation costs without compromising functionality.

Haz

ardo

us a

rea

Haz

ardo

us a

rea

Safe

are

a Sa

fe a

rea

Conventional

NEW

API-670 Style 19" Rack-Mount System Architecture

SKF Multilog DMx System Architecture

Field mounted, distributed monitors reduce costly control room cabinets and rack hardware.

Digital processing within a vibration monitor located on the machine skid significantly reduces field wiring.

Universal vibration monitor – protection and condition monitoring in a single device, for use in both conventional and hazardous areas.

Easy connection to plant control and information networks by common protocols.

DMx monitors with integral safety circuits almost eliminate traditional barriers.

Sensor

Sensor

Sensor

Sensor

Barrier

Monitor

Barrier

Driver and monitor

Driver

3

Figure 1. SKF Multilog DMx module dimensions.

156 mm

116 mm 104 mm

Frequency band monitoring: • Four independent, configurable bands for each FFT all with their band RMS, maximum line and frequency values.Vector data: • Four user definable n.nX amplitude and phase vectors per channel (e.g. 1x, 2x, 0.4x, 7x) for monitoring or balancing.Transient data acquisition: • Data capture triggered on transient window low, transient window high, ∆RPM, ∆time or ∆RPM + ∆time.

Power requirementsOperating voltage: • 8,6 to 9,5 V supplied by an I-S power supply.Power consumption: • 4 W typical.

PhysicalTwo part system: • Module consists of a removable processing unit and a terminal base mounted on DIN-rail.Dimensions:•

Height: 156 mm – (6.14 in.)Width: 104 mm – (4.09 in.)Depth: 116 mm – (4.57 in.)

Weight: • 0,5 kg (1.1 lb.) maximum.Mounting information: • See Figure 1 for DIN-rail mount.Enclosure requirements:•

Minimum IP 20 for II 2 (1) G Ex ib [ia] IIC T4 and II (1D) [Ex iaD]. –Minimum IP 54 for I M2 (M1) Ex ib [ia] I. –

Hot swappable: • Yes. Processing unit hot swappable on terminal base without disturbance to wiring.

EnvironmentalHazardous area:•

ATEX approved –IECEx approved –cULus approved –

EMC: • EMC tested to EN 61326, EN 61000-6-2 and NAMUR NE21.Compliance: • CE mark compliant, conforms to 94/9/EC ATEX Directive and to 89/336/EG EMC Directive.Operating temperature range: • –20 to +65 °C (–4 to +149 °F).Storage temperature range: • –20 to +100 °C (–4 to +212 °F).Humidity: • 93% relative humidity, non-condensing.Shock resistance: • 15 g peak for 11 ms.Vibration resistance: • 1 g, 10 to 150 Hz to IEC 60068-2-6.

NetworkSKF software interfaces for:•

Configuration and data display software. –Condition monitoring and plant asset management software. –Decision support software. –Common control protocols. –

Technical specificationsInputs

Sensors: • 4-channels dynamic.Sensor types: • Inputs from, and power to, 2-wire or 3-wire accelerometers, velocity transducers or eddy current probe systems. Integral driver circuits for directly connected eddy current probes.Sensor power: • 3,3 or 14 mA constant current, +20 V constant voltage at up to 14 mA.Logic input: • Single logic TTL level input for tachometer input or tachometer cascade from another SKF Multilog DMx module.Tachometer input: • Analog tachometer input (range 0 to +5 V) with programmable threshold level.Keyway phase reference input: • Two internal eddy current probe drivers on dynamic inputs may be routed to tachometer processing, with programmble thresholds.

Data acquisition and evaluation

GeneralSampling: • Parallel A/D conversion, digital signal processing, on-board clock calendar.Input frequency range: • DC to 20 kHz.Vibration acceleration, velocity and displacement: • Fully programmable AC and DC measurement units and sensitivities.Detection types: • True RMS, peak, peak-to-peak and rectified average signal assessments are concurrently available.Axial thrust and process variables: • Fully programmable DC measurement units and sensitivities.Turbine Supervisory Instrumentation: • Eccentricity, absolute shaft vibration, Smax, differential expansion, rotor acceleration (RPM/minute) and peak speed measurements.Speed: • Two tachometer processing channels, sourced from analog speed sensor or internal eddy current probe driver circuit, calculating actual and factored machine speed. One event per revolution target is required for vector data. Maximum event rate is 87 000 pulses per minute.Filter ranges: • Low pass and high pass filters (with 2-level integration if required) are implemented digitally.Accuracy: • ±1% excluding transducer circuit.

OutputsCommunications link: • Independent and isolated dual high speed RS 485 links.Communication speed: • Up to 125 kbaud (1.5 Mb/s capable).Digital output: • Five opto-isolated outputs for local alarm, shutdown or tachometer cascade between modules.

Machinery protectionResponse to alarm condition: • <100 ms in typical applications.Alarm delay: • Programmable 0 to 15 seconds, pre- or post-voting.Alarms: • High, low, in window, out of window for any measurement.Alarm voting: • Configurable voting in any logical combination of any measurement. Result transferred by communications link and opto-isolated output.Transducer OK: • Frequency monitoring provides enhanced OK detection, in addition to regular DC gap voltage monitoring, for directly connected eddy current probes. Bias voltage check for standard eddy current probe systems and accelerometers.Trip multiply: • User definable factors independent for each alarm parameter activated by communications link.Danger bypass: • Activated by communications link.Local indication: • LEDs on module; 4x Tx OK, 5x alarm, 1x power, 1x module run, 1x module status.

Condition monitoringFFT and time data: • Continuous and separate signal analysis paths for 2 048-point time waveforms and 800-line FFT for all channels.

4

Electrical data BVS 07 ATEX E 075 X ATEX directive group/category Gas: II 2(1)G Ex ib[ia] IIC T4 Mining: I M2(M1) Ex ib[ia] I Dust: II (1D) [Ex iaD]

IECEx BVS 07.0028 X [Zone 0] Ex ib[ia] IIC T4 Ex ib[ia] I [Ex iaD]

cULus – IS Process control equipment for use in Hazardous Locations, CL I, GP ABCD; CL II, GP EFG; CL III; CL I, Zone 1, AEx ib[ia] IIC; Ex ib[ia] IIC, T4. Providing IS circuits when installed per control drawing number 32125700.Associated Equipment [Ex ia] Appareillage Connexe.

Multi-drop configuration, dual RS 485 communications and power.

RS 485 2ARS 485 2BRS 485 1ARS 485 1BPower –Power +

Example SKF Multilog DMx schematic. 8-channel Ex installation.

Power supply(V+, V-)

RS 485(channel 1 and channel 2)

Tacho input Logic input Opto output (channel 1 to channel 5)

Connection 33 and 46 [+]

49 and 62 [–]

Channel 1:34, 36, 47, 50, 52 and 63

Channel 2:35, 37, 48, 51, 53 and 64

38, 54 39, 55 Channel 1: 41, 57Channel 2: 42, 58Channel 3: 43, 59Channel 4: 44, 60Channel 5: 45, 61

Maximum values per channel

Voltage Ui 9.5 V 4.2 V 5.4 V 5.4 V 15.0 V

Voltage Uo - - - 3.6 V 5.4 V 5.4 V - - -

Current Ii 1 A - - - - - - - - - 50 mA

Current Io - - - 103.5 mA 3 mA 2 mA - - -

Power Pi 9.5 W - - - - - - - - - 40 mW

Power Po - - - 94 mW 4 mW 3 mW - - -

Characteristic - - - linear linear linear - - -

Internal capacitance Ci 120 nF negligible negligible negligible negligible

Internal inductance Li negligible negligible negligible negligible negligible

Type of protection Exib IIC

Exib IIB

Exia I

Exia IIC

Exia IIB

Exia I

Exia IIC

Exia IIB

Exia I

Exia IIC

Exia IIB

Exia I

Exia IIC

Exia IIB

External capacitance Co [µF] - - - - - - - - - 100 1000 1000 65 1000 1000 65 1000 1000 - - - - - -

External inductance Lo [mH] - - - - - - - - - 3 10 40 1000 1000 1000 1000 1000 1000 - - - - - -

Lo / Ro [mH / Ω] - - - - - - - - - 0.38 1.52 5 8 35 100 13 52 100 - - - - - -

Apparatus supply and input/output parameters – CMMA 9910 and CMMA 9920

Up to 31 modules

RS 485 #1

RS 485 #2

RS 485isolator(s)

Power supply8.5 WX 4

Ex AreaZone 1 or Zone 2

5

Eddy Current Probe (ECP) input (channel 1 to channel 4) Two (2) wire input (channel 1 to channel 4)

Connection

Channels Channel 1 Channel 2 Channel 3 Channel 4 Channel 1 Channel 2 Channel 3 Channel 4

Terminals 1, 2, 17, 18 5, 6, 21, 22 9, 10, 25, 26 13, 14, 29, 30 (3) 19, 20 (7) 23, 24 (11) 27, 28 (15) 31, 32

Coax ECP1 ECP2 ECP3 ECP4 - - - - - - - - - - - -

Maximum values per channel

Voltage Ui 5.4 V 28.0 V

Voltage Uo 5.4 V 5.4 V

Current Ii - - - - - -

Current Io 16.3 mA negligible

Power Pi - - - - - -

Power Po 22 mW negligible

Characteristic linear linear

Internal capacitance Ci 200 nF negligible

Internal inductance Li negligible negligible

Type of protection Ex ia IIC Ex ia IIB Ex ia I Ex ia IIC Ex ia IIB Ex ia I

External capacitance Co [µF] 65 1000 1000 65 1000 1000

External inductance Lo [mH] 100 400 1000 1000 1000 1000

Lo / Ro [mH / Ω] 1.60 6.40 20 400 1000 1000

Electrical data

Apparatus supply and input/output parameters – CMMA 9910 Only

Self-generating sensor (e.g. velocity pickup).Eddy Current Probe using internal digital drivers.

Eddy Current Probe

CMSS 68-071-00-30-5A a = signal + (white)

b = signal – (black)

6

Eddy Current Probe (ECP) input(channel 3 to channel 4)

Transducer input, two (2) wire input(channel 1 to channel 4)

Transducer input, three (3) wire input(channel 1 to channel 4)

Connection

Channels Channel 3 Channel 4 Channel 1

Channel 2

Channel 3

Channel 4

Channel 1

Channel 2

Channel 3

Channel 4

Terminals 9, 10, 25, 26 13, 14, 29, 30 (3) 19, 20

(7) 23, 24

(11) 27, 28

(15) 31, 32

4, (3) 19, 20

8, (7) 23, 24

12, (11) 27, 28

16, (15) 31, 32

Coax ECP3 ECP4 - - - - - - - - - - - - - - - - - - - - - - - -

Maximum values per channel

Voltage Ui 5.4 V 28.0 V 28.0 V

Voltage Uo 5.4 V 5.4 V 26.5 V

Current Ii - - - - - - - - -

Current Io 16.3 mA negligible 90.9 mA

Power Pi - - - - - - - - -

Power Po 22 mW negligible 432 mW

Characteristic linear linear linear

Internal capacitance Ci 200 nF negligible negligible

Internal inductance Li negligible negligible negligible

Type of protection Ex ia IIC Ex ia IIB Ex ia I Ex ia IIC Ex ia IIB Ex ia I Ex ia IIC Ex ia IIB Ex ia I

External capacitance Co [µF] 65 1000 1000 65 1000 1000 0.095 0.73 3.90

External inductance Lo [mH] 100 400 1000 1000 1000 1000 3 10 50

Lo / Ro [mH / Ω] 1.60 6.40 20 400 1000 1000 0.05 0.23 0.70

Electrical data

Apparatus supply and input/output parameters – CMMA 9920 Only

Piezoelectric accelerometer (2-wire ICP type). Eddy Current Probes using external drivers (e.g. API 670).

a = signal + (white)

b = signal – (black)

Eddy Current Probe CMSS 68-071-00-30-5A

CMSS 668P-16-9

Shielded twisted triad cablee.g. Belden 8771

7

For additional information on SKF Reliability Systems products, contact:

SKF Reliability Systems5271ViewridgeCourt•SanDiego,California92123USATelephone:+1858-496-3400•FAX:+1858-496-3531

Kelvinbaan16,3439MT•Nieuwegein,TheNetherlandsTelephone:+31(0)306075957•FAX:+31(0)306043812

Web Site: www.skf.com/cm® SKF, Multilog and @ptitude are registered trademarks of the SKF Group All other trademarks are the property of their respective owners.

© SKF Group 2009The contents of this publication are the copyright of the publisher and may not be reproduced (even extracts) unless prior written permission is granted. Every care has been taken to ensure the accuracy of the information contained in this publication but no liability can be accepted for any loss or damage whether direct, indirect or consequential arising out of the use of the information contained herein. SKF reserves the right to alter any part of this publication without prior notice.

SKFPatentsinclude:#US04768380•#US05679900•#US05845230•#US05854553•#US05992237•#US06006164•#US06199422•#US06202491•#US06275781•#US06489884•#US06513386•#US06633822•#US6,789,025•#US6,792,360•US5,633,811•US5,870,699•#WO_03_048714A1

Publication CM2324 EN•April2009•Printedonenvironmentallyfriendlypaper.

Configuration and data display software (CMSW 6200-EN)

SKF Multilog DMx Manager software provides comprehensive transducer, data processing and alarm configuration in a user friendly interface. The software also provides live display of scalar value, time-waveform, FFT and orbit data from SKF Multilog DMx module monitor channels. For more comprehensive condition monitoring and analysis needs an interface into SKF’s @ptitude Monitoring Suite is available.

Ordering information

CMMA 9910 • Four (4) channel intrinsically safe SKF Multilog DMx module with 4x internal digital Eddy Current Probe drivers, 2x tacho input. No transducer power. Ex ib IIC.CMMA 9920 • Four (4) channel intrinsically safe SKF Multilog DMx module with 2x internal digital Eddy Current Probe drivers, 2x tacho input. With transducer power. Ex ib IIC.CMSW 6200-EN • SKF Multilog DMx Manager: Software for configuration and live display.