Omega Vehicle Security DRA-RTM-8 - Manual (Page 5)

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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.
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.
Figure 1.
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.
WARNING: Voltage sources should not be connected to the current
inputs,as permanent damage might occur.