Table 2-2. J1, 2 Wire Rs-485 Interface Pin-Out; Table 2-3. J1, 4 Wire Rs-485 Interface Pin-Out; Table 2-4. J1, Rs-232C Interface Pin-Out - Comtech EF Data LBC-4000 Installation And Operation Manual

L-Band Up/Down Converter System
Installation
2.5.2 RS-485/RS-232 I
The RS-485/RS-232 Interface connector, J1, is 9 pin "D" type DB9F connector socket. The pin-
out specifications for RS-485 are contained in Table 2-2 and Table 2-3. The specification for RS-
232 is contained in Table 2-4. The mating connector is a DB9M.
Table 2-2. J1, 2 Wire RS-485 Interface
Pin # Description
1 GND; Ground
2
3
4 +RX/TX; Signal
5 -RX/TX; Signal Complement
6
7
8 +RX/TX; Signal
9 -RX/TX; Signal Complement
Note: Pins 8 & 9 are the loop to the next
converter.

Table 2-4. J1, RS-232C Interface Pin-Out

Pin # Description
1
2 TD; Transmit Data
3 RD; Receive Data
4
5 GND; Ground
6 DSR; Unit Ready - always high.
7 RTS; Request to Send. Looped to CTS.
8 CTS; Clear to Send
9
(COM 1), C
NTERFACE
Pin-Out
ONNECTOR
Table 2-3. J1, 4 Wire RS-485 Interface
Pin # Description
1 GND; Ground
2
3
4 +TX; Signal
5 -TX; Signal Complement
6
7
8 +RX; Signal
9 -RX; Signal Complement
2-4
MN/LBC4000.IOM
Revision 2
J1
Pin-Out