(7) RS-422 connection diagram 7)
*1
Terminating resistors should not be provided for a PLC and an RS-232/RS-422 interface converter which will be terminals.
*2
Set the terminating resistor of GOT side which will be a terminal.
➠ ■3.
*3
Connect FG grounding to the appropriate part of a cable shield line.
■2. Precautions when preparing a cable
(1) Cable length
The maximum length of the RS-422 cable must be 500m or less.
(2) GOT side connector
For the GOT side connector, refer to the following.
➠
1.4.1 GOT connector specifications
(3) JTEKT PLC side connector
Use the connector compatible with the JTEKT PLC side module.
For details, refer to the JTEKT PLC user's manual.
■3. Connecting terminating resistors
(1) GOT side
(a)
For GT27, GT25(Except GT2505-V), GT23
Set the terminating resistor setting switch of the GOT main unit to "Disable".
(b)
For GT2505-V
Set the terminating resistor selector to "330Ω".
For the procedure to set the terminating resistor, refer to the following.
➠
1.4.3 Terminating resistors of GOT
* 2
GOT side
RDA
2
RDB
7
SDA
1
SDB
6
SG
5
RSA
3
CSA
4
RSB
8
CSB
9
FG
-
Connecting terminating resistors
Link unit
* 1
* 1
PLC side
side
L1S+
S+
L1S-
S-
L1R+
R+
L1R-
R-
0V
0V
FG
FG
* 3
8.3 Connection Diagram
8
8 - 13