Comtech EF Data OMS11 User Manual
Page 38
OMS11 1:1 Redundancy Switch
Connector Pinouts
TM133 – Rev. 1.1
5-5
H
Ground
GND
---
J
Switch Fault – C
SF-C
---
K
Switch Fault – NC
SF-NC
---
L
Switch Fault – NO
SF-NO
---
M
No Connect
---
---
N
No Connect
---
---
S
DSR
---
R
No Connect
---
---
U
No Connect
---
---
P
Modem A Online Relay – NC
MO-NC
---
T
Modem B Online Relay – NO
MO-NO
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5.4.3.1 Fault Detection
The OMS11 & OM20 work simultaneously to determine the status of all the components within
this system. The OMS11 & OM20 are capable of monitoring BUC and LNB redundancy system.
Faults detection is established by the OM20 and forwarded to the OMS11. Fault detection for a
redundant BUC system will be different based on whether the BUC Power is supplied by the
OM20 or if the BUC Power is supplied by an external power source. If the BUC power is supplied
externally, then the BUC must have Normally Closed Form C Fault contacts so the OMS11/OM20
can monitor the BUC fault status.
Figure 5-2 reflects the BUC fault detection connector which is required for BUC that are using
external Power supplies.
Figure 5-2 External BUC fault detection on CAR5902 or CAR5918