Mitsubishi Electric GOT2000 Series Connection Manual page 254

■8. RS-422/485 cable 8)
GOT side (terminal block)
SDA
SDB
RDA
RDB
SG
*1
*2
*3
*4
■9. RS-422/485 cable 9)
GOT side (terminal block)
SDA
SDB
RDA
RDB
SG
*1
*2
*3
*4
5 - 10
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
When placing the GOT to the terminal in the system configuration, set the terminating resistor to "330 ".
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
Set the 1pair/2pair signal selection switch to "1pair" when using the connection conversion adapter.
➠
Connection Conversion Adapter User's manual
For the terminating resistor of MODBUS
*3
The actual terminal layout on the MODBUS
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
Set the 1pair/2pair signal selection switch to "1pair" when using the connection conversion adapter.
➠
Connection Conversion Adapter User's manual
For the terminating resistor of MODBUS
®
MODBUS /RTU equipment side
(1st)
RDA(+)
RDB(-)
SDA(+)
SDB(-)
SG
®
/RTU equipment, refer to the manual of MODBUS
®
MODBUS /RTU equipment side
(1st)
(+)
(-)
SG
®
/RTU equipment may differ from the example shown above. SDA/B(+/-) and RDA/
®
/RTU equipment, refer to the manual of MODBUS
*1*2*4 ®
MODBUS /RTU equipment side
RDA(+)
RDB(-)
SDA(+)
SDB(-)
®
/RTU equipment manual.
®
/RTU equipment.
*1*2*4 ®
MODBUS /RTU equipment side
®
/RTU equipment.
*1*2*4
(2nd)
SG
*1*2*4
(2nd)
(+)
(-)
SG
®
/