Comtrol Cable - Manual (Page 32)

32 [Documentation number: 2000430 Rev B] Cable Adapters
8J RJ11 to Standard DB25 (Null-modem Configuration)
8J RJ11 to Standard DB25 (Null-modem Configuration)
The following table displays the modem wiring connection from a Comtrol 8J RJ11
to a standard DB25 connector.
Note: If your DB25 wiring differs from the one shown below, adjust the DB25
pinouts accordingly.
8J RJ11 to Standard DB9 (Null-modem Configuration)
The following table displays the modem wiring connection from a Comtrol 8J RJ11
to a standard DB9 Connector.
Note: If your DB9 wiring differs from the one shown below, adjust the DB9
pinouts accordingly.
8J RJ11 Connector Pinouts
a
a. RJ11 does not have all of the signals for RTS CTS (hardware handshaking). Use the cable for
XON/XOFF (software handshaking).
DB25 Connector Pinouts
Pin RS-232 Signal Pin RS-232 Signal
1 NC
4 RxD 2 TxD
3 TxD 3 RxD
6 CTS 4 RTS
b
b. RTS and CTS may be jumpered together.
5 CTS
b
1 DTR 6 DSR
2 SigGnd 7 SigGnd
5 DCD 8 DCD
20 DTR
8J RJ11 Connector Pinouts
a
a. RJ11 does not have all of the signals for RTS CTS (hardware handshaking). Use the cable for XON/
XOFF (software handshaking).
DB9 Connector Pinouts
Pin RS-232 Signal Pin RS-232 Signal
5 DCD 1 DCD
3 TxD 2 RxD
4 RxD 3 TxD
4 DTR
2 Signal GND 5 Signal GND
1 DTR 6 DSR
6 CTS 7 RTS
b
b. RTS and CTS may be jumpered together.
8 CTS
b
9 NC