Omron NT31 NT31C manual Recommended Connectors, Cables and Crimp Terminals

Connecting to the Host’s RS-422A/485 Port Section 5-2

CS1H-CPU65-E(V1) CS1H-CPU67-E(V1) C200HE-CPU32-(Z)E C200HG-CPU33-(Z)E C200HG-CPU53-(Z)E C200HX-CPU34-(Z)E C200HX-CPU54-(Z)E C200HX-CPU65-ZE CQM1H-CPU51

CS1H-CPU66-E(V1)

C200HE-CPU42-(Z)E C200HG-CPU43-(Z)E C200HG-CPU63-(Z)E C200HX-CPU44-(Z)E C200HX-CPU64-(Z)E C200HX-CPU85-ZE CQM1H-CPU61

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1325

NT31/NT31C side

	Abbreviation	Pin number
	FG	Connector
		hood
	−	1
RS-232C/	SD	2
422A/485	RD	3
connector
	RS	4
	CS	5
	−	6
	SG	7
	−	8
	TRM	9
	RDB (+)	10
	SDB (+)	11
	−	12
	−	13
	−	14
	SDA (−)	15
	RDA (−)	16
	−
	−	−
	RSB (+)	23
	RSA (−)	24
	−	25

(25-pin type)

16

PC (CPU) side

Shielding wire	Pin number	Abbreviation
	Connector	FG
	hood
	1	SDA (−)	RS-422A
	2	SDB (+)	connector	9
	3	−	5

4−

5−

6RDA (−)

7−

8	RDB (+)
9	−
	(9-pin type)

Next PT

In order to avoid an FG ground loop, do not connect the functional ground of the

NT31/NT31C to the shielding of the RS-485A cable.

5-2-6 Recommended Connectors, Cables and Crimp Terminals

Connectors and Cables Recommended for RS-422A/485

When making an RS-422A/485 connecting cable, as far as possible use the rec- ommended parts indicated in the table below. When using the memory link method, however, use a connector that matches with the RS-422A port at the CPU (CP) side. Some units come supplied with one connector and connector hood.

Check the required parts and prepare them in advance.

Name	Model	Maker	Remarks
		25-pin type	Delivered with the following
	XM2A-2501		units:
		Made by OMRON
			C500-LK203
Connector
			Delivered with the following
	DB-25P F-N	25-pin type	units:
		Made by JAE	3G2A6-LK201-EV1
			3G2A5-LK201-EV1

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