Rs-422 Cable - Mitsubishi Electric GOT2000 Series Connection Manual

2.3.2

RS-422 cable

■1. Connection diagram
(1) RS-422 connection diagram 1)
■2. Precautions when preparing a cable
(1) Cable length
The length of the RS-422 cable must be 200m or less.
(2) GOT side connector
For the GOT side connector, refer to the following.
➠
(3) HITACHI IES PLC side connector
Use the connector compatible with the HITACHI IES PLC side module.
For details, refer to the HITACHI IES 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, GT21
Set the terminating resistor selector to "330Ω".
For the procedure to set the terminating resistor, refer to the following.
➠
(2) HITACHI IES PLC side
When connecting an intelligent serial port module to a GOT, a terminating resistor has to be connected to the
intelligent serial port module.
➠
2 - 6
2.3 Connection Diagram
GOT side
RDA
2
RDB
7
SDA
1
SDB
6
RSA
3
RSB
8
CSA
4
CSB
9
- -
SG
5
- -
FG -
1.4.1GOT connector specifications
1.4.3Terminating resistors of GOT
HITACHI IES PLC user's Manual
HITACHI IES PLC side
TXDP
TXDN
RXDP
RXDN
R
TXDG
-
-
-
-
RXDG
-
-