Specifications

SQ: 1-42
RS3: Service Quick Reference Guide
Troubleshooting
Serial (MPC) I/O Troubleshooting (continued)
Condition Action
Discrete input module does
not work. Input FIC point
LED not on. FIC
communications are OK.
1. Check the mode of the CIB; i t m ust be i n A UTO or
MANUAL. If the Status Field is blank, this
indicates an override condition, which is illegal for
aCIB.
Check if the discrete manual bypass is turned
on for this point.
Replace the FIC.
Replace the FlexTerm motherboard.
2. Measure the voltage across the i nput terminations
for the faulty point.
NOTE: If the CIB is configured for Normally
Closed (N.C.) operation, the Field State on the CIB
screen will show ON when the m odule has no
voltage across it and OFF when the module has
voltage across it.
3. If no voltage is present across the point:
Check the polarity for the DC m odule.
Replace the module.
Replace the FIC.
4. If all of the points on this FIC and the card next to it
are not working, the FIC may not be seated
properly in its connectors.
It is possible one of the two connector tabs are not
seated correctly in the FlexTerm motherboard
connectors.
WARNING
Before proceeding, remove all field voltage
from the FIC to prevent shock or equipment
damage.
Loosen the two captive screws holding the FIC in
place. Gently move the card away from the
FlexTerm mounting plate and verify that both card
connector tabs are properly plugged into the
motherboard connectors.