Comtech EF Data CRS-180 - Manual (Page 41)

CRS-180 70/140 MHz IF 1:1 Redundancy Switch MN/CRS180.IOM
Switch Connectors and Pinouts Revision 11
3–5
3.2.1.2 ‘J3 | Control A’ Connector (Top) – Modem ‘A’ (DB-9F)
The Modem ‘A’ Control connector is a 9-pin Type ‘D’ female interface. Pins 2, 3,
and 4 carry signals looped through the switch module from Modem ‘B’ to Modem
‘A’, while pins 6, 7, and 8 loop the same signals from Modem ‘A’ through to
Modem ‘B’. The 12VDC input, which is diode OR’ed with the corresponding 12VDC
input from Modem ‘B’, powers the switch module.
Table 3-2. ‘J3 | Control A’ Modem Connector Pinouts
Pin Signal Name Signal Function Direction
5 Ground Signal Ground -
9 +12VDC +12 VDC In
4 ONLINE_OUT_B Modem ‘B’ Online Indication Out
8 /FAIL_OUT_A Modem ‘A’ Fault Indication In
3 ONLINE_OUT_B Modem ‘B’ Online Indication Out
7 ONLINE_OUT_A Modem ‘A’ Online Indication In
2 AUX_SER_TX_B Modem ‘B’ Serial Tx Out
6 AUX_SER_TX_A Modem ‘A’ Serial Tx In
1 Ground Signal Ground -
3.2.1.3 ‘J4 | Control B’ Connector (Bottom) – Modem ‘B’ (DB-9F)
The Modem ‘B’ Control connector is a 9-pin Type ‘D’ female interface. Pins 2, 3,
and 4 carry signals looped through the switch module from Modem ‘A’ to Modem
‘B’, while pins 6, 7, and 8 loop the same signals from Modem ‘B’ through to
Modem ‘A’. The 12VDC input, which is diode OR’ed with the corresponding 12VDC
input from Modem ‘A’, powers the switch module.
Table 3-3. ‘J4 | Control B’ Modem Connector Pinouts
Pin Signal Name Signal Function Direction
5 Ground Signal Ground -
9 +12VDC +12 VDC In
4 /FAIL_OUT_A Modem ‘A’ Fault Indication Out
8 /FAIL_OUT_B Modem ‘B’ Fault Indication In
3 ONLINE_OUT_A Modem ‘A’ Online Indication Out
7 ONLINE_OUT_B Modem ‘B’ Online Indication In
2 AUX_SER_TX_A Modem ‘A’ Serial Tx Out
6 AUX_SER_TX_B Modem ‘B’ Serial Tx In
1 Ground Signal Ground -