Rs-485 communications with a micrologix 1000 – Rockwell Automation 2707-L40X_L8X_V40X DTAM Plus Operator Interface Module Installation Instructions User Manual

Page 87

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Chapter 6
Communication Connections and Setup

6–11

The DTAM Plus must be set as follows for communication to occur. The
DTAM module uses DH485 protocol but the comm port is set for RS-485
(switch 1 position 2 is on). This is a 3-node network and is not expandable.

DTAM Plus

Comm Port (RS485)

Cable (Catalog No.

1761-CBL-HM02)

RS232

MicroLogix 1000

AIC+

DH485

RS232

Com 1

Personal Computer

You will need to construct a cable that connects to the AIC+ and the DTAM
Plus/Micro. Refer to the following illustration.

Termination

AIC+

Port 3

Communications Port

DTAM Plus

9-Pin Male D Connector

A

Common

1

2

3

4

5

1

2

3

4

8

9

6

B

Shield

Chassis Ground

6-Pin Connector

RS–485/DH–485
Communications with a
MicroLogix 1000

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