Omron Programmable Terminals NT31 NT31C Setup Manual page 135

Connecting to the Host's RS-422A/485 Port
1
13
124
Wiring When Connecting a CS1-series CS1G/H Serial Communication
Board, C Series C200HX/HG/HE(-Z)E Communication Board, or CQM1H
Serial Communications Board
Applicable units:
14
NT31/NT31C side
Abbreviation Pin number
Connector
FG
hood
−
1
SD
RS-232C/ 2
422A/485
RD 3
interface
RS 4
CS
5
−
6
SG 7
−
8
TRM 9
RDB (+)
10
SDB (+) 11
−
12
−
13
−
14
SDA (−) 15
25
RDA (−)
16
−
− −
RSB (+) 23
RSA (−) 24
−
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-422A cable.
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
C200HX-CPU65-ZE
CQM1H-CPU51
PC side
Pin number Abbreviation
Shielding wire
Connector
FG
hood
SDA (−)
1
RS-422A
interface
2 SDB (+)
−
3
−
4
−
5
RDA (−)
6
−
7
8 RDB (+)
−
9
(9-pin type)
Next PT
Section 5-2
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
C200HX-CPU85-ZE
CQM1H-CPU61
6
1
9
5