Comtech EF Data CRS-150 - Manual (Page 34)

CRS-150 1:1 Redundancy Switch Revision 2
Connector Pinouts MN/CRS150.IOM
3–8
3.2.3 Front Panel Utility Connectors
3.2.3.1 Ext Ref, 50Ω BNC
This is 50 Ω BNC female connector is used for operating an external station reference. It
requires an EIA-422 compatible level, so this unbalanced input should have a zero volt
(0V) offset and a swing of at least
±2V into the 120Ω termination provided.
3.2.3.2 IDR Alarms Connector, DB-15F
The 15-pin Type ‘D’ female (DB-15F) IDR Alarms interface connection
provides four Form-C backward alarm outputs specified by Intelsat.
IDR Alarms Connector (DB-15F)
Pin # Signal Function Name
2
9
1 Backward Alarm 1 is active
Backward Alarm 1 is not active
BA-1-NO
BA-1-COM
BA-1-NC
10 TBD MON-A
4
11
3
Backward Alarm 2 is active
Backward Alarm 2 is not active
BA-2-NO
BA-2-COM
BA-2-NC
6
13
5
Backward Alarm 3 is active
Backward Alarm 3 is not active
BA-3-NO
BA-3-COM
BA-3-NC
14 TBD MON-B
8
15
7
Backward Alarm 4 is active
Backward Alarm 4 is not active
BA-4-NO
BA-4-COM
BA-4-NC
12 Ground GND
3.2.4 Front Panel Power Connections – Aux DC Inputs
The front panel of the CRS-150 incorporates two independent DC inputs (using 2.1
mm sockets, with the outer conductor grounded). Comtech EF Data can supply the
appropriate AC/DC supply, complete with IEC power input connector (Part number
PS/AC18W01P01).
For more information about Comtech EF Data accessories that make use of this interface, see
Chapter 1. INTRODUCTION.