Comtech EF Data CST-5000 - Manual (Page 95)

Theory of Operation CST-5000 C-Band Satellite Terminal
5–6 Rev. 9
5.1.5 M&C Board Connector Pinouts
5.1.5.1 EIA-232/485 Remote Control (J1)
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. Refer to the following listing for pin
assignments:
Pin # EIA-232 EIA-485 Description
1 GND GND Ground
2 TD/TX Transmit Data
3 RD/RX Receive Data
4 +RX/TX Plus Transmit or Receive
5 GND -RX/TX Negative Transmit or Receive
6 DSR Data Set Ready
7 RTS Ready to Send
8 CTS +RX/TX Clear to Send (EIA-485 - Plus Transmit or Receive)
9 -RX/TX Negative Transmit or Receive Data
Notes:
1. Clear to Send (CTS) is tied to Ready to Send (RTS) in EIA-232 mode.
2. The pinout for Data Terminal Equipment (DTE) interface is provided for
EIA-232.
5.1.5.2 Remote Relay Control, J2 DB15-Female
Pin # Name Description
1 EXT PWR Output voltage, 11V, 1A
9 LNA_PWR 10V to LNA
2 NO A Summary fault relay A
10 COM A Normal operation, common connects to NO
3 NC A Fault mode, common connects to NC
11 NO B Summary fault relay B
4 COM B Normal operation, common connects to NO
12 NC B Fault mode, common connects to NC
5 SPARE
13 SPARE
6 ALOG TST Analog voltage output, TBD
14 LNA_PWR_RTN Ground Return for LNA
7 EXT INPUT2 Input, logic 0 (normal) or 5V (fault)
15 EXT TWT FLT Input, logic 0 or 5V, used for TWT.FLT
8 GND Ground