5ć10 – Rockwell Automation 1785-LTx,D17856.2.1 Classic PLC-5 Programmable Controllers Users Manual User Manual

Page 68

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Choosing Communication

Chapter 5

5-10

The PLC-5 processor has two connectors that are electrically identical.
Connection to either one provides the same communication link. These
connectors are:

9-pin D-shell DH+ COMM INTFC connector
3-pin DH+ COMM INTFC connector

You can connect DH+ links to Data Highway via a communication
interface such as the 1785-KA module. The 1785-KA module allows
nodes on a DH+ link to communicate with nodes on Data Highway or on
another DH+ link.

See your local Allen-Bradley sales office or distributor for more
information on connecting DH+ to Data Highway. Also, see the Data
Highway/Data Highway Plus Protocol and Command Set, publication
1770-6.5.16, for more information.

You can connect your programming terminal to a PLC-5 processor in
several ways:

direct connect to the DH+ link
remote connection (DH+ to Data Highway to DH+)
serial connections

Direct Connect to DH+ Link

Use a 1784-KT to connect a T53 or IBM-compatible programming
terminal directly to a processor or to a DH+ link that connects processors
(Figure 5.8).

Connecting a DH+ Link

to Data Highway

Choosing Programming

Terminal Connection

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