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Two or more modules can be set to the same channels (1-8 or 9-16)
4. Connect the signal outputs. Unused outputs can be left unconnected.
MAINTENANCE
Check the module for correct operation at regular intervals.
Fault finding
Fault
No signal from all
outputs; green
LED not lit.
No signal from all
or some outputs;
green LED is lit.
Output constant
approx. 1mA
Output constant
but gas level
display changing
Output current too
low or will not
reach 20mA
Red LEDs unlit or
permanently lit
6
Cause
No DC supply to
module
Faulty module
No signal from
input modules
Wrong channels
selected on 4-
20mA module
No signal from
input module(s)
Fault on output
module.
System in inhibit
Load resistance
too high
Fault on output
module or input or
relay modules
Remedy
Connect system ribbon cable to module
Replace module
Check input modules
Check position of Channels link
Press Acknowledge
Check connection to input module(s)
If fault persists then replace module.
Return Inhibit switch to position 0
Reduce load resistance
Check all modules
Issue 1 – November 2006
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