Comtech EF Data KST-12025 - Manual (Page 92)

Theory of Operation KST-12025 Ku-Band Satellite Terminal
5–6 Rev. 1
5.1.5 M&C Board Connector Pinouts
5.1.5.1 EIA-232-C/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.
Pin # EIA-232-C 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-C mode.
2. Pinout for Data Terminal Equipment (DTE) interface is provided for EIA-
232-C.
5.1.5.2 Remote Relay Control, J2 DB15-Female
Pin # Name Description
1 EXT 10V Output voltage, 10V at 1000 mA
9 LNA PWR Output, 11V
2 DL FLT NO Downlink FLT, Opens on FLT
10 DL COM DL
3 DL FLT NC DL
11 UL FLT NO Uplink FLT, Opens on FLT
4 UL COM UL FLT Common
12 UL FLT NC UL FLT Closes on FLT
5 SPARE
13 SPARE
6 ALOG TST Analog voltage output, TBD
14 LNA PWR RTM Ground, Return for LNA Power
7 EXT INPUT2 Input, logic 0 or 5V
15 EXT TWT FLT Input, logic 0 or 5V, TWT Fault
8 GRD Ground