LST Vds MEA244-1, Vds MEA244-1-TR User Manual

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MultiModule

MEA244-1

ADM loop technology with System Sensor/200 protocol

4 independent line-monitoredinputs

4 independent outputs with patented monitoring of line resistance and load resistance

Optimized for use in extinguishing systems

Supply supervised for undervoltage

Description

The Multi Module MEA244-1has been designed especially for use in extinguishing systems. It has 4 independent inputs for connection of contact detectors, and 4 independent, powerful outputs for actuation of external control devices.

The inputs are monitored to detect wire breakages and short circuits of the connection leads. On the outputs the internal resistances of the control devices and the line resistances are monitored separately. An automatic calibration procedure, which gets started by pressing a key during commissioning, determines the reference values of both resistances. The patented method of multiple monitoring makes the reliable detection of line or load faults as well as contact corrosion possible.

The multi module is used as loop element with integrated dual-isolator,in an ADM loop with System Sensor/200 protocol. The module occupies 8 consecutive

addresses on the ADM loop. During commissioning, the base address, which is assigned to input 1, gets entered using a key, all further addresses are automatically assigned by the module.

The MEA244-1and the connected control devices are supplied through an external 24V power supply. The supply voltage gets supervised for undervoltages. If the voltage drops below the threshold of the undervoltage detection, then this event is automatically signalled to the control panel, via the loop, as fault of all four outputs. Each input and each output has a status LED.

The multi module is available in two versions:

The MEA244-1/TRhas been designed for mounting on a DIN rail,

the MEA244-1/Ecan be mounted in a control panel using the supplied mounting spacers.

Building Safety. Building Security.

A

© LABOR STRAUSS SICHERUNGSANLAGENBAU GMBH • A-1231WIEN • WIEGELESTRASSE 36 • TEL +43 152114-0• FAX +43 152114-27

MEA244-1_DBL_LST_EN_0823.PDF• PAGE 1

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Specifi cations

Supply voltage

20 to 30VDC

Threshold of undervoltage detection

21.7V (can be increased to 25.3V by using a jumper)

Current consumption at 24V

35mA (quiescent)/max. 160mA (without load)

Current consumption on the loop

500µA

Number of inputs / outputs

4 / 4

Load current per output

max. 1.5A

Ambient temperature MEA244-1

-5°Cto +60°C

Ambient temperature external control equipment

+5°C to +50°C (to ensure the functioning of the fault detection)

Patent number

AT 501 215 B1

Approval

VdS G205120

Multi module for mounting on rail

 

Dimensions L × W × H

196 × 97 × 56 (mm)

Weight

310g

Order number

249092

Order name

Multi Module/Mounting Rail MEA244-1/TR

Multi module for mounting in control panel

 

Dimensions L × W × H

194 × 93 × 20 (mm)

Weight

150g

Order number

249095

Order name

Multi Module/Panel Mounting MEA244-1/E

Building Safety. Building Security.

A

© LABOR STRAUSS SICHERUNGSANLAGENBAU GMBH • A-1231WIEN • WIEGELESTRASSE 36 • TEL +43 152114-0• FAX +43 152114-27

MEA244-1_DBL_LST_EN_0823.PDF• PAGE 2

OFFICE@LST.AT • WWW.LST.AT • ALL RIGHTS RESERVED