Mitsubishi Electric GOT1000 Series Connection Manual page 242

RS422/485 cable 8) (2 pair wiring)
GOT side (terminal block)*)
SDA
SDB
RDA
RDB
SG
*1 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.
*2 Some MODBUS
In this case, the wiring between GOT and SG is unnecessary.
*3 For the terminating resistor of MODBUS
*4 Set the 2-wire/4-wire terminating resistor setting switch of the RS-232/485 signal conversion adaptor as follows.
2-wire type/4-wire type: 4-wire type (2Pair)
<When placing GOT to the terminal>
Set the same terminating resistor value as that of MODBUS
terminating resistor of GOT.
If the terminating resistor value of MODBUS
side to "OPEN" and install the terminating resistor set according to the terminating resistor value of MODBUS
the RS-232/485 signal conversion adaptor externally.
<When placing GOT to other than the terminal>
Set the terminating resistor of the GOT to "OPEN".
*5 Some MODBUS
232/485 signal conversion adaptor is unavailable.
RS422/485 cable 8) (1 pair wiring)
GOT side(terminal block)
SDA
SDB
RDA
RDB
SG
*1 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.
*2 Some MODBUS
In this case, the wiring between GOT and SG is unnecessary.
*3 For the terminating resistor of MODBUS
*4 Set the 2-wire/4-wire terminating resistor setting switch of the RS-232/485 signal conversion adaptor as follows.
2-wire type/4-wire type: 2-wire type (1Pair)
<When placing GOT to the terminal>
Set the same terminating resistor value as that of MODBUS
terminating resistor of GOT.
If the terminating resistor value of MODBUS
side to "OPEN" and install the terminating resistor set according to the terminating resistor value of MODBUS
the RS-232/485 signal conversion adaptor externally.
<When placing GOT to other than the terminal>
Set the terminating resistor of the GOT to "OPEN".
*5 Some MODBUS
232/485 signal conversion adaptor is unavailable.
4 - 10
4. MODBUS(R)/RTU CONNECTION
4.3 Connection Diagram
MODBUS
*4*5
®
/RTU equipment doesn't have SG.
1.4.4 Setting the RS-232/485 signal conversion adaptor
®
/RTU equipment require the control line (CS, RS) to be controlled. In this case, the connection using the RS-
*4*5
®
/RTU equipment doesn't have SG.
1.4.4 Setting the RS-232/485 signal conversion adaptor
®
/RTU equipment require the control line (CS, RS) to be controlled. In this case, the connection using the RS-
*1*2*3
/RTU equipment side
®
(1st)
RDA(+)
RDB(-)
SDA(+)
SDB(-)
SG
®
/RTU equipment may differ from the example shown above. SDA/B(+/-) and RDA/
®
/RTU equipment, refer to the manual of MODBUS
®
/RTU equipment. However, only "110 "/"330 " can be set as the
®
/RTU equipment is other than "110 "/"330 ", set the terminating resistor of GOT
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
®
/RTU equipment. However, only "110 "/"330 " can be set as the
®
/RTU equipment is other than "110 "/"330 ", set the terminating resistor of GOT
MODBUS /RTU equipment side
®
(2nd)
RDA(+)
RDB(-)
SDA(+)
SDB(-)
SG
®
/RTU equipment to be used.
*1*2*3
MODBUS /RTU equipment side
®
(2nd)
(+)
(-)
SG
®
/RTU equipment to be used.
*1*2*3
®
/
®
/RTU equipment to
*1*2*3
®
/
®
/RTU equipment to