Omron Programmable Terminals NT31 NT31C Setup Manual page 138

Connecting to the Host's RS-422A/485 Port
1
13
5-2-6 Recommended Connectors, Cables and Crimp Terminals
14 NT31/NT31C side
Abbreviation Pin number
Connector
FG
hood
−
1
RS-232C/ SD 2
422A/485
RD 3
connector
RS 4
CS 5
−
6
SG 7
−
8
9
TRM
RDB (+) 10
SDB (+) 11
−
12
−
13
−
14
25 SDA (−) 15
RDA (−) 16
−
− −
RSB (+) 23
24
RSA (−)
−
25
(25-pin type)
In order to avoid an FG ground loop, do not connect the functional ground of the
NT31/NT31C to the shielding of the RS-485A cable.
Connectors and Cables Recommended for RS-422A/485
When making an RS-422A/485 connecting cable, as far as possible use the rec-
ommended parts indicated in the table below. When using the memory link
method, however, use a connector that matches with the RS-422A port at the
CPU (CP) side. Some units come supplied with one connector and connector
hood.
Check the required parts and prepare them in advance.
Name
XM2A-2501
Connector
DB-25P F-N
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
C200HX-CPU65-ZE
CQM1H-CPU51
PC (CPU) side
Pin number Abbreviation
Shielding wire
Connector
FG
hood
SDA (−)
1
2 SDB (+)
−
3
−
4
−
5
RDA (−)
6
−
7
RDB (+)
8
−
9
(9-pin type)
Next PT
Model Maker
25-pin type
Made by OMRON
25-pin type
Made by JAE
Section
CS1H-CPU66-E(V1)
C200HE-CPU42-(Z)E
C200HG-CPU43-(Z)E
C200HG-CPU63-(Z)E
C200HX-CPU44-(Z)E
C200HX-CPU64-(Z)E
C200HX-CPU85-ZE
CQM1H-CPU61
1
RS-422A
connector
5
Remarks
Delivered with the following
units:
C500-LK203
Delivered with the following
units:
3G2A6-LK201-EV1
3G2A5-LK201-EV1
5-2
6
9
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