Comtech EF Data XPA-200 Installation And Operation Manual page 24

XPA200-7984-I-OPT1, X-Band SSPA
1.11.1 RS-485/RS-232C Interface (COM1), Connector J6
The RS-485/RS-232C Interface connector, J6, is a 9 pin "D"
type DB9F connector socket.
contained in Table 1-1.
Pin # RS-232C
1 no connect
2 TD; Transmit Data
3 RD; Receive Data
4 no connect
5 GND; Ground
6 DSR; Unit Ready -
always high.
7 RTS; Request to
Send. Looped to
CTS
8 CTS; Clear to
Send
9 no connect
XPA200-7984-I-OPT1, REV.3
The pin-out specifications are
The mating connector is a DB9M.
Table 1-1.
J6, COM1 connector Pin-Out
RS-485 4-Wire
GND; Ground
no connect
no connect
+TX; Signal
-TX; Signal
Complement
no connect
no connect
+RX; Signal
-RX; Signal
Complement
Introduction
RS-485 2-Wire
GND; Ground
no connect
no connect
+RX/TX; Signal
-RX/TX; Signal
Complement
no connect
no connect
+RX/TX; Signal
-RX/TX; Signal
Complement
1-8