Omron CPM1A operation manual One-to-N Host Link Connection

Wiring and Connections Section 3-4

The following diagram shows the wiring in the RS-232C cable used to connect a

CPM1A to a host computer or Programmable Terminal.

IBM PC/AT compatible computer or Programmable Terminal (9-pin)

Signal	Pin No.
CD	1
RD	2
SD	3
ER	4
SG	5
DR	6
RS	7
CS	8
CI	9

RS-232C Adapter

Pin No. Signal

1/Cover FG

2SD

3RD

4RS

5CS

6–

7–

8–

9SG

One-to-N Host Link Connection

The type of connector used will vary depending on the PT. Check the PT manual to ensure the correct connector is used.

Note When the CPM1A is connected to a host computer or OMRON PT, set the RS-232C Adapter’s mode setting switch to “HOST.”

Up to 32 CPU Units can be connected to an IBM PC/AT compatible computer or a Programmable Terminal with a 3G2A9-AL004-E Link Adapter and RS-422 Adapters, as shown in the following diagram.

RS-232C cable

Link Adapter 3G2A9-AL004-E

RS-422 cable

RS-422	RS-422	RS-422
Adapter	Adapter	Adapter
CPM1A	CPM1A	CPM1A
CPU Unit	CPU Unit	CPU Unit

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