Connecting to the Host's RS-422A/485 Port
1
13
5-2-4 1:N Connection among RS-422A Ports
120
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
TRM
9
RDB (+)
10
SDB (+)
11
−
12
−
13
−
14
SDA (−)
15
25
RDA (−)
16
−
−
−
RSB (+)
23
RSA (−)
24
−
25
(25-pin type)
For details on handling shield wires, refer to 5-2-8 Handling the Shield on
RS-442A/485 Cables on page 127.
The connection method in which the RS-422A ports of multiple NT31/NT31Cs
and one host are connected in a 1:N connection is described here.
24V
DC
PRINTER PORT B
C200HX-CPU65-ZE
CQM1H-CPU51
PLC (CPU) side
Pin number
Abbreviation
Shielding wire
Connector
FG
hood
1
SDA (−)
RS-422A
connector
2
SDB (+)
−
3
−
4
−
5
6
RDA (−)
−
7
8
RDB (+)
−
9
(9-pin type)
NT31/NT31C
Serial port B
(RS-422A, 25-pin
type)
25-pin connector
Relay terminal block
Max. 2 m
RS-422A cables
(max. total length 500 m)
Section
5-2
C200HX-CPU85-ZE
CQM1H-CPU61
6
1
9
5
CPU
CS1G/H
C200HX/HG/HE(-Z)E
CQM1H
9-pin connector