Comtech EF Data SDM-300L3 - Manual (Page 57)

SDM-300L3 Satellite Modem Revision 1
Connector Pinouts MN/SDM300L3.IOM
3–3
Note: The European EMC Directive (EN55022, EN50082-1) requires using properly shielded
cables for DATA I/O. These cables must be double-shielded from end-to-end, ensuring a
continuous ground shield.
3.2 Connector Description
3.2.1 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 Table 3-2 for pinout information.
Table 3-2. 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 -).