Omron NT31

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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
CS1G/H
C200HX/HG/HE(-ZE)
CPU
25-pin connector
9-pin connector
Serial port B
(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 can be used.
Connecting an NT31/NT31C and Host
NT31/NT31C
RS-485
Host
 Wiring when connecting a CS1-series CS1G/H serial communication board and
C series C200HX/HG/HE (–ZE) communication board
Applicable units:
CS1G-CPU42-E CS1G-CPU43-E
CS1G-CPU44-E CS1G-CPU45-E
CS1H-CPU63-E CS1H-CPU64-E
CS1H-CPU65-E CS1H-CPU66-E
CS1H-CPU67-E
C200HE-CPU32-(Z)E C200HE-CPU42-(Z)E
C200HG-CPU33-(Z)E C200HG-CPU43-(Z)E
C200HG-CPU53-(Z)E C200HG-CPU63-(Z)E
C200HX-CPU34-(Z)E C200HX-CPU44-(Z)E
C200HX-CPU54-(Z)E C200HX-CPU64-(Z)E
C200HX-CPU65-ZE C200HX-CPU85-ZE