Rs-422/485 Cable - Mitsubishi Electric GOT2000 Series Connection Manual

5.3.2

RS-422/485 cable

The following shows the connection diagrams and connector specifications of the RS-422/485 cable used for connecting the
GOT to a PLC.
■1. RS-422/485 cable 1)
CON side(20 pin)
*5
SDA1(TXD1+)
6
SDB1(TXD1-) *5
R
8
*3 RDA1(RXD1+) *5
10
RDB1(RXD1-) *5
R
12
*3
SG
2
NC
1
NC
3
NC
4
SDA2(TXD2+)
5
SDB2(TXD2-)
7
RDA2(RXD2+)
9
RDB2(RXD2-)
11
NC
13
RSA(RTS+)
14
NC
15
RSB(RTS-)
16
NC
17
CSA(CTS+)
18
NC
19
CSB(CTS-)
20
*1
*2
*3
*4
*5
5 - 6
5.3 Connection Diagram
*3
Some MODBUS/RTU equipment doesn't have SG.In this case, the wiring between GOT and SG is unnecessary.
Some MODBUS/RTU equipment require the control line (CS, RS, etc.) to be controlled. Make sure to connect the cables and
wires as described in the MODBUS/RTU equipment manual.
A terminating resistor is required. Set the terminating resistor selector of the main unit to "Disable" and connect a 110
terminating resistor.
➠
1.4.3 Terminating resistors of GOT
For the terminating resistor of MODBUS/RTU equipment, refer to the manual of MODBUS/RTU equipment to be used.
Use the twisted pair cable for SDA1/SDB1 and RDA1/RDB1.
MODBUS/RTU equipment side
RDA(+)
RDB(-)
SDA(+)
SDB(-)
SG
*1*2*4
MODBUS/RTU equipment side
RDA(+)
SDA(+)
*1*2*4
RDB(-)
SDB(-)
SG