Mitsubishi Electric GOT2000 Series Connection Manual page 294

(4) RS-422/485 connection diagram 4)
GOT side(slave) *3
(2nd)
SDA
1
SDB
6
RDA
2
R
RDB
7
*3
SG
5
RSA
3
RSB
8
CSA
4
CSB
9
*1
*2
*3
*4
(5) RS-422/485 connection diagram 5)
GOT side(slave) *3
(2nd)
SDA1 1
SDB1 2
RDA1 3
RDB1 4
SDA2 5
SDB2 6
RDA2 7
RDB2 8
SG 9
FG 10
*1
*2
*3
*4
7 - 8
7.3 Connection Diagram
The actual terminal layout on the MODBUS/RTU master equipment may differ from the example shown above. SDA/B(+/-) and
RDA/B(+/-) terminals can be separated from each other. In such cases, make sure to connect the cables and wires as described
in the MODBUS/RTU master equipment manual.
Some MODBUS/RTU master equipment don'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 "Enable" (Set to "110 Ω" for
GT21).
When placing the GOT to the position other than the terminal, set the terminating resistor of the GOT to "Disable" (Set to "OPEN"
for GT21).
➠
1.4.3 Terminating resistors of GOT
For the terminating resistor of MODBUS/RTU master equipment, refer to the manual of MODBUS/RTU master equipment.
The actual terminal layout on the MODBUS/RTU master equipment may differ from the example shown above. SDA/B(+/-) and
RDA/B(+/-) terminals can be separated from each other. In such cases, make sure to connect the cables and wires as described
in the MODBUS/RTU master equipment manual.
Some MODBUS/RTU master equipment don'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 "Enable".
When placing the GOT to the position other than the terminal, set the terminating resistor of the GOT to "Disable".
➠
1.4.3 Terminating resistors of GOT
For the terminating resistor of MODBUS/RTU master equipment, refer to the manual of MODBUS/RTU master equipment.
GOT side(slave) *3
(1st)
SDA
1
SDB
6
RDA
2
RDB
7
SG
5
RSA
3
RSB
8
CSA
4
CSB
9
GOT side(slave) *3
(1st)
SDA1
1
SDB1
2
RDA1
3
RDB1
4
SDA2
5
SDB2
6
RDA2
7
RDB2
8
SG
9
FG
10
MODBUS /RTU master equipment side
(+)
(-)
MODBUS /RTU master equipment side
(+)
(-)
SG
*1*2*4
*1*2*4