Comtech EF Data OMS11 - Manual (Page 39)

Connector Pinouts OMS11 1:1 Redundancy Switch
TM133 – Rev. 1.1 5-6
Fault detection with the OM20 supplying power to BUC:
• BUC Faults - OM20 uses internal fault detection circuitry to determine BUC status and
initiates a fault that is forwarded to the OMS11
• OM20 uses internal fault detection circuitry to determine LNB status and initiate fault
Fault detection with BUC power supplied externally:
• BUC must have Form C contacts in order for BUC fault detection to work
• OM20 data cable CAR5902 or CAR5918 has an external connector that is used to
connect and monitor Form C Contacts from the BUC.
• OM20 uses internal fault detection circuitry to determine LNB status and initiate fault