Omron NT31 NT31C manual Direct Connection between RS-485 Ports at Both Units

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

5-2-3 Direct Connection between RS-485 Ports at Both Units

The connection method in which the RS-485 ports of an NT31/NT31C and a host are connected is described here.

NT31/NT31C

CPU

25-pin connector

CS1G/H

C200HX/HG/HE(-Z)E

CQM1H

Serial port B	9-pin connector
(RS-485, 25-pin type)

RS-485 cable with connectors (max. length: 500 m)

Reference: When RS-485 is used at the PT side, only the NT link (1:N) method (standard or high-speed) can be used.

Connecting an NT31/NT31C and Host

NT31/NT31C Host

RS-485

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

Board and C Series C200HX/HG/HE(-Z)E Communications 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

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

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