Audio Interface Connector (P4A); Remote Control Interface Connector (P4B); Table 5-5. Audio Interface Connector Pin Assignments; Table 5-6. Remote Control Interface Connector Pin Assignments - Comtech EF Data CDM-600 Operating Instructions Manual

CDM-600 Satellite Modem
Connector Pinouts
5.5

Audio Interface Connector (P4A)

The Audio interface connection is a 9-pin female D connector located on the rear panel of
the modem. Refer to Table 5-5 for pin assignments.
Pin #
1
6
2
7
8
4
9
5
3
5.6

Remote Control Interface Connector (P4B)

The remote control interface connection is a 9-pin male connector located on the rear
panel of the modem. Refer to Table 5-6 for pin assignments.The remote control port is
intended for connection to an M&C computer, or terminal device. This interface is user
selectable for either EIA-232 or EIA-485.

Table 5-6. Remote Control Interface Connector Pin Assignments

Pin #
1
2
3
4
5
6
7
8
9
* Use for 2-wire EIA-485 operation

Table 5-5. Audio Interface Connector Pin Assignments

Signal Function
Tx Audio 1 +
Tx Audio 1 -
Rx Audio 1 +
Rx Audio 1 -
Tx Audio 2 +
Tx Audio 2 -
Rx Audio 2 +
Rx Audio 2 -
Common
Description
Ground
EIA-232 Transmit Data
EIA-232 Receive Data
Reserved - do not connect to this pin
Ground
EIA-485 Receive Data B
EIA-485 Receive Data A
EIA-485 Transmit Data B
EIA-485 Transmit Data A
*
*
5–4
Revision 7
MN/CDM600.IOM
Direction
In
In
Out
Out
In
In
Out
Out
Direction
Out
In
In
In
Out
Out