Comtech EF Data CRS-170A - Manual (Page 47)

CRS-170A L-Band 1:1 Redundancy Switch MN/CRS170A.IOM
Switch Connectors and Pinouts Revision 13
3–5
3.2.1.2 J3 | Control 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_A Modem ‘A’ Online Out
8
SERIAL_FAULT_A Modem ‘A’ Serial Faults In
3
CLK_OUT_B Modem ‘B’ Clk Out Out
7
CLK_IN_A Modem ‘A’ Clk In In
2
AUX_SER_TX_B Modem ‘B’ Tx Comms Out
6
AUX_SER_TX_A Modem ‘A’ Tx Comms In
1
Ground Signal Ground
---
3.2.1.3 J4 | Control 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 12 VDC 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 +12VDC
In
4
ONLINE_B Modem ‘B’ Online
Out
8
SERIAL_FAULT_B Modem ‘B’ Serial Faults
In
3
CLK_OUT_A Modem ‘A’ Clk Out
Out
7
CLK_IN_B Modem ‘B’ Clk In
In
2
AUX_SER_TX_A Modem ‘A’ Tx Comm
Out
6
AUX_SER_TX_B Modem ‘B’ Tx Comm
In
1 Ground Signal Ground ---