Recommended User-Supplied Components - Allen-Bradley MicroLogix 1400 User Manual

Chapter 4 Communication Connections
80

Recommended User-Supplied Components

These components can be purchased from your local electronics supplier.
User Supplied Components
Component
external power supply and chassis ground
NULL modem adapter
straight 9-25 pin RS-232 cable
Port 1
DB-9 RS-232
6 1
2
7
3
8
4
9 5
Pin Port 1: DB-9 RS-232
1 received line signal detector
(DCD)
2 received data (RxD)
3 transmitted data (TxD)
(1)
4 DTE ready (DTR)
5 signal common (GND)
(1)
6 DCE ready (DSR)
7 request to send (RTS)
8 clear to send (CTS)
9 not applicable
(1)
On port 1, pin 4 is electronically jumpered to pin 6. Whenever the AIC+ is powered on, pin 4 will match the
state of pin 6.
(2)
An 8-pin mini DIN connector is used for making connections to port 2. This connector is not commercially
available. If you are making a cable to connect to port 2, you must configure your cable to connect to the
Allen-Bradley cable shown above.
(3)
In the 1761-CBL-PM02 cable, pins 4 and 6 are jumpered together within the DB-9 connector.
Recommended Model
power supply rated for 20.4...28.8V dc
standard AT
see table below for port information if making
own cables
1761-CBL-AP00 or 1761-CBL-PM02
Port 2
cable straight D connector
6 7 8
3
5
4
1 2
(2)
Port 2 : (1761-CBL-PM02
cable)
24V dc
ground (GND)
request to send (RTS)
(3)
received data (RxD)
received line signal detector
(DCD)
(3)
clear to send (CTS)
transmitted data (TxD)
ground (GND)
not applicable
Rockwell Automation Publication 1766-UM001I-EN-P - June 2015
Port 3
RS-485 connector
6
5
4
3
2
1
Port 3: RS-485
Connector
chassis ground
cable shield
signal ground
DH-485 data B
DH-485 data A
termination
not applicable
not applicable
not applicable