Data I/O; Remote (J6); Fault (J7) - Comtech EF Data SDM-650B Installation And Operation Manual

SDM-650B Satellite Modem

2.2.1 DATA I/O

For information and pinouts on the data connectors, refer to Chapter 3.

2.2.2 Remote (J6)

The remote connector on the modem is used to interface the Monitor and Control (M&C)
functions to a remote location. This interface can be either RS-232-C or RS-485. For a
complete discussion on the remote interface, refer to Chapter 3.
The remote interface is provided on a 9-pin female D connector. Screw locks are
provided for mechanical security of the mating connector. The remote connector is a Data
Circuit Terminating Equipment (DCE) interface.
Pin #

2.2.3 Fault (J7)

The fault connector on the modem is used to provide FORM C contact closures for the
purpose of fault reporting.
There are three FORM C summary fault contacts:
•
•
•
Refer to Chapter 4 for a complete discussion on monitored faults.
To obtain a system summary alarm, connect all FORM C contacts in parallel.
Rev. 5
RS-485 RS-232-C
Name Pin #
1 GND 1
2 2
3 3
4 +RX/TX 4
5 -RX/TX 5
6 6
7 7
8 +RX/TX 8
9 -RX/TX 9
Modulator
Demodulator
Common equipment
Name
RD (RX)
TD (TX)
GND
DSR
RTS
CTS
Installation
2–3