Gebrder Trox GmbH Telephone +49 (0) 28 45/2 02-0Telefax +49 (0) 28 45/2 02-2 65

Heinrich-Trox-Platz www.troxtechnik.comD-47504 Neukirchen-Vluyn e-mail trox@trox.de

Pressure Monitoring DeviceTPM

2Contents

Subject Page

Description 3

Schematic Diagram of Function 4

Description of Function 4

Diagram of Function 4

Terminal Assignment, Commissioning 5

Specification Text 6

3TPM Pressure Monitoring Device Description

The TPM Pressure Monitoring Device has been designed tomonitor pressure-controlled rooms and comprises a basicunit with the FCCU-T Operator Terminal. As a supplemen-tary option a matching pressure transducer can be suppliedif there is not one, i.e. to provide an independent monitoringfunction.

The Monitoring includes:

indication of power supply failure

an visual alarm that cannot be deleted

an acoustic alarm

alarm via potential-free contact

The TPM uses the actual value output (analogue signal) of the room pressure differential transducer, that is eitherexisting or is available as a supplementary option.

It provides a visual and acoustic alarm if the requiredpressure is not reached. The acoustic alarm can be sup-pressed via a button on the operator terminal or stops automatically after a period of time that can be set. Thealarm can be passed on via a potential-free contact.

Basic Unit

The basic unit with the dimensions W x H x L = 110 x 180 x 90 mm contains the control electronics and the connections for the room pressure differentialtransducer, operators terminal and the volt-free contactsfor sending messages to the building management system.

FCCU-T Operator Terminal

The three LEDs (red, yellow and green), the piezoelectricloudspeaker for the acoustic alarm and the alarm suppressbutton are integrated in the operators terminal.

Meaning of the LED function displays:

Green Pressure OKRed Alarm (falling below required pressure)

Simultaneous acoustic alarm, alarm passed on via relay

Yellow Required pressure exceeded

The operators terminal should be mounted in a clearlyvisible place in the room, e.g. next to a door.

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FCCU-T Operator Terminal

Alarm suppress button, red LED

Display normal mode, green LED

Display pressure not reached,yellow LED

Service terminal connection (laptop)

Power supply failure,red LED flashing

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Schematic Diagram of TPM Functions Description of Function

The TPM monitoring device is used to visualise and monitor the room pressure. For this purpose the pressure-linear analogue output signal of a pressure trans-ducer is connected. This transducer usually simultaneouslyacts as an actual value sensor for room control. In especial-ly sensitive areas the use of an additional separate pressuretransmitter (recording of independent measured values) is recommended. All standard diaphragm pressure trans-ducers (possibly with a digital display) can be used becausethe TPM can be programmed accordingly.

The actual value is recorded permanently and compared to the set value. If the required pressure is exceeded in thesafe direction, a yellow LED on the operator terminalindicates the deviation. In the case of deviations in theunsafe direction, in other words against neutral pressure(0 Pa), the red alarm LED lights up. In addition, an acousticsignal sounds. This signal stops after a period that can be pre-set or after the suppress button on the operatorterminal has been pressed. The red alarm LED lights upuntil the pressure conditions once again comply with theset value.

The TPM monitoring device allows pressure reversalswitching with an external normally open contact. Then, for example, it is possible to switch from a pressure to bemonitored to 20 Pa to + 20 Pa.

An alarm contact (changeover contact) is available to passon the alarm message to the building management system.

Room

Referenceroom

TPM

Operator terminal

Diaphragm pressure transducer

VAV unit supply air, controlling room pressure

VAV unit extract air

Switch to changeover pressure

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TPM Diagram of Function

Tolerance

Red LED +acoustic alarm

Tolerance

Green LEDYellow LED

Yellow LED

GreenLED

5KeyN : NeutralL : Supply voltage (230 VAC, depending on

device configuration, see sample order, page 6, 24 VAC optional)

PE : Technical earthingGND : Signal GroundRC1 : Switching input changeoverRC2 : Not assignedRC3 : Not assigned1 : Input reference signal2 : Not assignedNO, C, NC: Alarm output to building central control, (BMS) volt-free, changeover contact

TPM Terminal Connection

Computer Connection to TPM Commissioning the TPM

The system is commissioned via the serial RS232 interfaceof a standard PC with a terminal program, such as Hyper-terminal, which is in the scope of supply of Windows.

The terminal cable needed with a connecting plug toconnect the RS232 interface is available separately.Detailed instructions for downloading the parameters are also supplied.

Basic requirements for commissioning are:

PC (laptop) with serial interface

The TPM must be correctly connected

The power supply must be ensured

Powersupply

Switching inputs Operator terminal connection

COM1 or COM2

Operator terminal

Terminal cable *

* Terminal cable, Art. No. M546EW5, to be ordered separately

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Specification Text

TPMPressure monitoring device to control room pressure, visualand acoustic indication if required pressure is not reachedand visual indication if pressure is exceeded. Evaluation ofthe actual output signal of an existing or optionally availablean additional pressure transducer to independently recordthe room pressure.

The following values are monitored:

Pressure below the set/required pressure, visual alarmred LED and acoustic alarm with adjustable acousticalarm time that can be suppressed on the operator terminal, as well as passing on via potential-free contact.

Exceeding the set/required pressure, yellow LED

Set pressure OK, green LED

Special function:

Pressure reversal via switching input.Supply voltage 230 VACDegree of protection IP21

Sample Order

Type TPM, 230 VAC, M546EY2

Terminal cable, Art. No. M546EW5

Disclaimer

Purchase of goods and services is subject to Gebrder Trox GmbH standard terms and conditions.

Warranties only apply to explicit contracts between customers and the Company. Thedetails provided in this brochure are for general information purposes only. They are not intended to guarantee any particular product properties or suitability for particular purposes of use. They are only intended as general information. Illustrated products andsystems are only intended to show possible product alternatives. The illustrations may

also show products and systems that were customised to specific customers requirementsand are only available in this form as customer-specific solutions. Some products andsystems provided in this brochure may show special equipment that is only available at anadditional charge.

The details on scope of delivery, appearance, performance as well as weights and measures are valid at the time of the printing of this brochure and they are subject to changeat any time. All previous releases are now superseded.

Pressure Monitoring Device TPMContentsDescriptionBasic UnitDescription of FunctionTPM Diagram of FunctionKeyCommissioning the TPMSpecification TextSample Order