Omron NT31 NT31C manual 124

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

Wiring When Connecting a CS1-series CS1G/H Serial Communication

Board, C Series C200HX/HG/HE(-Z)E Communication Board, or CQM1H

Serial Communications Board

Applicable units:

CS1G-CPU42-E(V1) CS1G-CPU44-E(V1) CS1H-CPU63-E(V1) 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

CS1G-CPU43-E(V1) CS1G-CPU45-E(V1) CS1H-CPU64-E(V1) 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

114

1325

NT31/NT31C side

Abbreviation Pin number

FG Connector hood

−1

RS-232C/	SD	2
422A/485
	RD	3
interface
	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 side

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

4−

5−

6RDA (−)

7−

8RDB (+)

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-422A cable.

124