Omron NT631C manual 108

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

Using the NT Link (1:N) Method

Setting the DIP Switches on a C200HX/HG/HE(-Z)E Communications Board

Set the switches on a C200HX/HG/HE(-Z)E Communications Board as fol- lows.

Switch 1: 4 (4-wire = RS-422A)

Switch 2: ON (terminator ON = terminating resistance enabled).

Setting Switches on a CQM1H Serial Communications Board

Set the switches on a CQM1H Serial Communications Board as follows.

2-wire or 4-wire selector (WIRE): 4 (4-wire = RS-422A)

Terminating resistance switch (TERM): ON (terminator ON = terminating resistance enabled).

Serial Communications Board (Inner Board slot 1)

Terminator Switch (TERM)

Set to ON (right side).

Wire Selection Switch (WIRE)

Set to 4 (right side).

Compatible Host Units

The OMRON PLCs that can be connected using the RS-422A/485 NT Link (1:N) method are the CS/CJ-series, C200HX/HG/HE(-Z)E, and CQM1H mod- els only. A Serial Communications Board/Unit or a Communications Board must be installed to make the connection.

Check the model and series of the PLC against the type of CPU Unit or com- munications board before making the connections.

The hosts that can be connected to the RS-232C port of the NT631/NT631C by the RS-422A NT Link (1:N) function via an Adapter are indicated in the table below.

PLC	CPU Units with	CPU Unit that becomes	Model Name
Series	Built-in NT Link	connectable by installing a
	(1:1) Function	Communications Board/Unit
CS		CS1G-CPU42/43/44/45-E(V1)(*1)	CS1G
Series		CS1H-CPU63/64/65/66/67-E(V1)(*1)	CS1H
		CS1G-CPU42H/43H/44H/45H(*1)	CS1D
		CS1H-CPU63H/64H/65H/66H/67H(*1)
		CS1D-CPU65H/67H(*2)
CJ		CJ1G-CPU44/45(*3)	CJ1G
Series		CJ1G-CPU42H/43H/44H/45H(*3)	CJ1H
		CJ1H-CPU65H/66H/67H(*3)	CJ1M
		CJ1M-CPU11/12/13/21/22/23(*3)

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