Omron NT631C manual Wiring When Connecting a CVM1/CV-series CPU Unit

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

RDA	NT631/NT631C side
TRM			Abbreviation	Short-circuit tool
			RDA (-)		Shielding wire
RDB
			TRM
SDA			RDB (+)
		RS-422A/
			SDA (-)
		485
SDB		terminal	SDB (+)
		block
RSA			RSA (-)
			RSB (+)
RSB			Functional
			ground

	PLC side
Pin number	Abbreviation
Connector	FG
hood
1	SDA (-)
2	SDB (+)	RS-422A
	−	terminal
3		block
4	−
5	−
6	RDA (-)
7	−
8	RDB (+)
9	−

16

24V	(9-pin type)
+DC

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For details on handling shield wires, refer to 5-2-8 Handling the Shield on RS- 422A/485 Cables on page 125.

Wiring When Connecting a CVM1/CV-series CPU Unit

Applicable Units:

CV500-CPU01-EV1CV1000-CPU01-EV1

CV2000-CPU01-EV1

CVM1-CPU01-EV@CVM1-CPU11-EV@

CVM1-CPU21-EV@

CVM1/CV-series CPU Units whose model names do not have the suffix -EV@cannot be connected by any connection method.

RDA	NT631/NT631C side
TRM			Abbreviation	Short-circuit tool
				Shielding wire
			RDA (-)
RDB
			TRM
SDA			RDB (+)
		RS-422A/
			SDA (-)
		485
SDB		terminal	SDB (+)
		block
RSA			RSA (-)
			RSB (+)
RSB			Functional
			ground

	PLC side
Pin number	Abbreviation
Connector	FG
hood
1	SDA (-)
2	SDB (+)	RS-422A
	−	terminal
3		block
4	PS
5	CS
6	RDA (-)
7	−
8	RDB (+)
9	−

16

24V	(9-pin type)
+DC

59

For details on handling shield wires, refer to 5-2-8 Handling the Shield on RS- 422A/485 Cables on page 125.

Wiring for a Memory Link Connection

Prepare the adapter cable while referring to the following diagram.

RDA	NT631/NT631C side
TRM			Abbreviation	Short-circuit tool
					Shielding wire
			RDA (-)
RDB
			TRM
SDA		RS-422A/	RDB (+)
		485
			SDA (-)
		interface
SDB			SDB (+)
RSA			RSA (-)
			RSB (+)
RSB			Functional
			ground

Host side

Abbreviation
Connector
hood
SDA (-)
SDB (+)	RS-422A
	connector
RS
CS
RDA (-)
RDB (+)

24V

+DC

For details on handling shield wires, refer to 5-2-8 Handling the Shield on RS- 422A/485 Cables on page 125.

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