Omron NT31 NT31C Connection between NT31/NT31C Units RS-485, Connecting an NT-AL001 and Host

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

Connection between NT31/NT31C Units (RS-485)

1

13

The relay terminal board is not included in the figure below. Insert a relay termi- nal board so as to achieve the wiring configuration indicated below.

	NT31/NT31C				Host
	RS-485
	:
14	NT31/NT31C side				NT31/NT31C side			1	14
		Abbreviation	Pin number	Shielding wire	Pin number	Abbreviation
			Connector		Connector
		FG				FG
			hood		hood
		−	1		1	−
	RS-232C/	SD	2		2	SD	RS-232C/
	422A/485	RD	3		3	RD	422A/485
	connector						connector
		RS	4		4	RS
		CS	5		5	CS
		−	6		6	−
		SG	7		7	SG
		−	8	:	8	−
		TRM	9		9	TRM
		RDB (+)	10		10	RDB (+)
		SDB (+)	11		11	SDB (+)
		−	12		12	−
		−	13		13	−
		−	14		14	−
25		SDA (−)	15		15	SDA (−)		13	25
		RDA (−)	16		16	RDA (−)
		−			−	−
		−	−			−
		RSB (+)	23		23	RSB (+)
		RSA (−)	24		24	RSA (−)
		−	25		25	−

(25-pin type) (25-pin type)

*2

Make the connection pin numbers 9 and 10 at the terminal NT31/NT31C (marked

:in the figure above).

In order to avoid an FG ground loop, make the connection between the connec- tor hood and the shielding at the one side only.

Connecting an NT-AL001 and Host

NT31/NT31C	NT-AL001		Host
		RS-232C

Wiring when connecting a CS1-series CS1G/H Serial Communications Board, CQM1H Serial Communications Board, or C-series C200HX/HG/HE(-Z)E Com- munications Board.

Applicable PCs:

CS1G-CPU42-E(V1) CS1G-CPU43-E(V1)

CS1G-CPU44-E(V1) CS1G-CPU45-E(V1)

CS1H-CPU63-E(V1) CS1H-CPU64-E(V1)

CS1H-CPU65-E(V1) CS1H-CPU66-E(V1)

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