Omega Vehicle Security DRA-RTM-8 manual Current Inputs, Connecting Transmitters to the Multiplexer

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Insert the two printed cards into their slots. Connect the flat cable between them. Connect the front panel flat cables. The panel must be inserted into the grooves on both sides of the case while pressing down until a distinct "click" is heard. Assembly is completed by laying the terminal strips in

place.

Figure 1.

Note: The terminal strips are polarized and must not be placed backwards.

5. CURRENT INPUTS

The eight 4-20mA current inputs are marked as channels 9-16. These inputs are for current only. The "COM" input is the return for all the current channels. It is possible to connect any current source, as long as a closed loop is maintained.

WARNING: Voltage sources should not be connected to the current

inputs,as permanent damage might occur.

6. CONNECTING TRANSMITTERS TO THE MULTIPLEXER

6.1 TWO WIRE TRANSMITTER

A Two-Wire transmitter is connected so that its

 

positive terminal is connected to the positive

 

terminal of the power supply, and its negative

 

terminal is connected to the "I" terminal.

 

(see fig 2)

Figure 2.

6.2 FOUR WIRE TRANSMITTER

A Four-Wire transmitter is connected so that its positive terminal is connected to the "I" terminal, and its negative terminal is connected to the "COM" terminal. (see fig 3)

Figure 3.

3

 

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Contents User’s Guide Omega.comTM Contents General Description AssemblyMounting Instructions Replacing FusesTWO Wire Transmitter Connecting Transmitters to the MultiplexerFour Wire Transmitter Current InputsControl Connecting the DRA-RTM-8 to a PLCEnable Address Polarity see fig AddressCalibration True High SettingCalibration Procedure Span Coarse Calibration Tables Calibration Tables Zero Coarse Calibration TablesAnalog Inputs RTD Input Multidrop ConfigurationWARRANTY/DISCLAIMER Temperature
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