Omron NT31 NT31C manual CS1G/H C200HX/HG/HE-ZE

Connecting to the Host’s RS-232C Port Section 5-1

If there is +5 V output at the PC side, no external power supply is required for the NT-AL001.

Wiring for a Memory Link Connection

Prepare the adapter cable while referring to the diagram shown below.

	NT-AL001 side
1	6	Abbreviation	Pin number
		FG	Connector
			hood
		−	1
	RS-232C	SD	2
	connector	RD	3
		RS	4
		CS	5
		+5V	6
		−	7
		−	8
		SG	9
		(9-pin type)	Shielding wire

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No +5 V output is at the host side

Host side

Abbreviation

Connector

hood

SD

RD RS-232C

connector

RS

CS

(+5V)

SG

A +5 V output is present at the host side

Since it is necessary to input a voltage of +5 V to the number 6 pin of NT-AL001, supplying a voltage of 5 V from the host or an external voltage supply for NT- AL001 is required.

5-1-3 1:N Connection between RS-422A/485 at the PT and RS-232C at the Host

The connection method in which the RS-422A/485 ports of multiple NT31/NT31Cs are connected to the RS-232C port of one host in a 1:N connec- tion is described here.

An RS-232C/RS-422A convertor unit (NT-AL001) is used to convert between the RS-232C and RS-422A/485 communication methods.

NT31/NT31C

Serial port B (RS-422A/485, 25-pin type)

Host link unit/CPU

CS1G/H

C200HX/HG/HE(-Z)E

	RS-232C/RS-422A	9-pin connector
25-pin connector convertor unit
	(NT-AL001)
Relay terminal block
Max. 2 m	RS-232C cable with
	connectors
	RS-422A terminal 9-pin connector
	block
RS-422A/485 cable
(max. total length: 500 m)

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