Allen-Bradley micrologix 1500 User Manual

Publication 1764-UM001B-EN-P - April 2002
4-6 Communication Connections
Constructing Your Own Modem Cable
If you construct your own modem cable, the maximum cable length is
15.24 m (50 ft) with a 25-pin or 9-pin connector. Refer to the following
typical pinout for constructing a straight-through cable:
Constructing Your Own Null Modem Cable
If you construct your own null modem cable, the maximum cable
length is 15.24m (50 ft) with a 25-pin or 9-pin connector. Refer to the
following typical pinout:
AIC+ Optical Isolator
or 1764-LRP Channel 1
Modem
9-Pin 25-Pin 9-Pin
3TXD TXD2 3
2RXD RXD3 2
5GND GND7 5
1CD CD8 1
4DTR DTR204
6DSR DSR6 6
8CTS CTS5 8
7RTS RTS4 7
pins 4 and 6
are internally
connected for
1764-LRP only
Optical Isolator Modem
9-Pin 25-Pin 9-Pin
3TXD TXD2 3
2 RXD RXD 3 2
5GND GND7 5
1CD CD8 1
4DTR DTR204
6DSR DSR6 6
8CTS CTS5 8
7RTS RTS4 7

Allen-Bradley micrologix 1500 Specifications

General

Brand	Allen-Bradley
Model	micrologix 1500
Category	Controller
Language	English