Mitsubishi Electric GOT2000 Series Connection Manual page 256

■4. RS-422/485 cable 4)
GOT side (D-Sub 9-pin)
SDA
1
SDB
6
RDA
2
RDB
7
SG
5
RSA
3
RSB
8
CSA
4
CSB
9
*1
*2
*3
*4
■5. RS-422/485 cable 5)
GOT side (terminal block)
SDA1 1
SDB1 2
RDA1 3
RDB1 4
SDA2 5
SDB2 6
RDA2 7
RDB2 8
SG 9
FG 10
*1
*2
*3
*4
5 - 8
5.3 Connection Diagram
*3
The actual terminal layout on the MODBUS/RTU equipment may differ from the example shown above. SDA/B(+/-) and RDA/B(+/
-) terminals can be separated from each other. Make sure to connect the cables and wires as described in the MODBUS/RTU
equipment manual.
Some MODBUS/RTU equipment doesn't have SG. In this case, the wiring between GOT and SG is unnecessary.
When placing the GOT to the terminal in the system configuration, set the terminating resistor to "110 ".
When placing the GOT to the position other than the terminal, set the terminating resistor of the GOT to "OPEN".
➠
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.
*3
The actual terminal layout on the MODBUS/RTU equipment may differ from the example shown above. SDA/B(+/-) and RDA/B(+/
-) terminals can be separated from each other. Make sure to connect the cables and wires as described in the MODBUS/RTU
equipment manual.
Some MODBUS/RTU equipment doesn't have SG. In this case, the wiring between GOT and SG is unnecessary.
When placing the GOT to the terminal in the system configuration, set the terminating resistor to "100 OHM".
When placing the GOT to the position other than the terminal, set the terminating resistor of the GOT to "No".
➠
1.4.3 Terminating resistors of GOT
For the terminating resistor of MODBUS/RTU equipment, refer to the manual of MODBUS/RTU equipment.
MODBUS/RTU equipment side
(1st)
(+)
(-)
SG
MODBUS/RTU equipment side
(1st)
(+)
(-)
SG
*1*2*4
MODBUS/RTU equipment side
*1*2*4
MODBUS/RTU equipment side
*1*2*4
(2nd)
(+)
(-)
SG
*1*2*4
(2nd)
(+)
(-)
SG