Omron NT31 NT31C manual Type of Host and Settings, Method Reference

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

Note One end of the wire must always be connected to the host (PC), and there must be no branching. Branching will cause problems such as transmission delays and communication failures.

PC	(At termination)
				Relay terminal block
					Max. 2 m
NT31C		NT31				NT31
			NT31
(Not at		(Not at				(At
termination)		termination)	(Not at			termination)
			termination)

NT31

PC

NT31C

NT31

NT31

PC

Relay terminal block

NT31C NT31

Example of Good Connection Examples of Bad Connections

Reference: CS1 series CPUs cannot be connected with the 1:1 connection NT link method. Use the 1:N connection NT Link method (standard or high-speed) instead to make the 1:1 connection. For details, refer to Using the NT link (1:N) method (page 72) or Using the High-speed NT link (1:N) method (page 75).

5-1-1 The Type of Host and Settings

The using condition is the same as the connecting PT side RS-232C and the host side RS-232C.

For the available type and settings of the host, refer to the pages listed below.

Method	Reference
Host link	Host Link Method (page 54)
NT link (1:1)	NT Link (1:1) method (page 67)
NT link (1:N)	Using the NT Link (1:N) Method (page 72)
High-speed NT link (1:N)	Using the High-speed NT Link (1:N) Method (page 75)
Memory link	Memory Link Method (page 78)

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