Mitsubishi Electric GT1685 Connection Manual page 706

21.3.2 RS-422 cable

Connection diagram
RS-422 connection diagram 1)
GOT side
SDA
1
RDA
2
RSA
3
CSA
4
SG
5
SDB
6
RDB
7
RSB
8
CSB
9
RS-422 connection diagram 2)
First GOT side
RDA
2
RDB
7
SDA
1
SDB
6
SG
5
CSA
4
CSB
9
RSA
3
RSB
8
21 - 6
21. MULTIPLE-GT14, GT12, GT11, GT10 CONNECTION FUNCTION
21.3 Connection Diagram
GOT side
RDA
2
SDA
1
CSA
4
RSA
3
SG
5
RDB
7
SDB
6
CSB
9
RSB
8
Second GOT side
(terminal block)
SDA
1
SDB
2
RDA
3
RDB
4
SG
5
RSA
6
RSB
7
CSA
8
CSB
9

Precautions when preparing a cable
(1) Cable length
The length of the RS-422 cable must be 30m or less.
(2) GOT side connector
For the GOT side connector, refer to the following.
1.4.1 GOT connector specifications

Connecting terminating resistors
(1) GOT side
When connecting a PLC to the GOT, a terminating
resistor must be connected to the GOT.
Set the terminating resistor selector of the GOT main
unit to "300 ".
For the procedure to set the terminating resistor, refer
to the following.
1.4.3 Terminating resistors of GOT