Omron Programmable Terminals NT31 NT31C Setup Manual page 95

Connecting to the RS-232C Port at the Host
84
Serial Port B
Prepare the adapter cable while referring to the following diagram.
1 14
13 25
NT31/NT31C
Abbreviation Pin number
Shielding wire
Connector
FG
hood
–
1
SD 2
RS-232C
RD
3
/422A/485
RS
connector 4
CS
5
–
6
SG
7
–
8
TRM
9
10
RDB (+)
SDB (+) 11
–
12
–
13
–
14
SDA (–)
15
RDA (–)
16
–
– –
23
RSB (+)
24
RSA (–)
– 25
(25-pin type)
Section 4-1
PC (Host link unit)
Abbreviation
Connector
hood
SD
RS-232C
RD
connector
RS
CS
SG