Comtech EF Data SDM-300A, Installation And Operation Manual

Page: 39 / 398

Installation SDM-300A Satellite Modem
2–6 Rev. 4
2.3.1 Remote Connector and Pinouts (J6)
The remote connector is a 9-pin subminiature female D connector (J6) located on the rear
panel of the modem. Screw locks are provided for mechanical security of the mating
connector.
The remote connector interfaces the M&C functions to a remote location. The remote
location can be an M&C computer located away from the modem, but attached via cable to
the remote connector. This DCE interface is user selectable for either EIA-232 or EIA-484.
Refer to
Appendix B for a description of the remote interface commands.
Refer to Table 2-2 for pinout information.
Table 2-2. Remote Connector and Pinouts (J6)
Pinout
EIA-232 EIA-485
Pin # Name Pin #
Name
(2-Wire)
Name
(4-Wire)
1 1 GND
2 RD (RX) 2
3 TD (TX) 3
4 4* +RX/TX +TX
5 GND 5* -RX/TX -TX
6 DSR 6
7 RTS 7
8 CTS 8* +RX/TX +RX
9 9* -RX/TX -RX
*For 2-Wire Operation:
•
Only two wires are required.
•
Tie pins 4 and 8 together (both +).
•
Tie pins 5 and 9 together (both -).