Mitsubishi Electric GOT1000 Series Connection Manual page 239

RS422/485 cable 3) (2 pair wiring)
*3
GOT side (D-Sub 9-pin)
SDA
1
R
SDB
6
*3
RDA
2
R
RDB
7
*3
SG
5
RSA
3
RSB
8
CSA
4
CSB
9
*1 Some MODBUS
*2 Some MODBUS
Make sure to connect the cables and wires as described in the MODBUS
*3 A terminating resistor is required. For GT16, set the terminating resistor selector of the main unit to "Disable" and connect a
330 terminating resistor. For GT15, connect a 330
*4 For the terminating resistor of MODBUS
RS422/485 cable 4) (2 pair wiring)
*3
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 Some MODBUS
*2 Some MODBUS
Make sure to connect the cables and wires as described in the MODBUS
*3 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
*4 For the terminating resistor of MODBUS
RS422/485 cable 4) (1 pair wiring)
*3
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 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
*3 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
*4 For the terminating resistor of MODBUS
®
MODBUS /RTU equipment side
RDA(+)
RDB(-)
SDA(+)
SDB(-)
®
/RTU equipment doesn't have SG. In this case, the wiring between GOT and SG is unnecessary.
®
/RTU equipment require the control line (CS, RS, etc.) to be controlled.
®
/RTU equipment, refer to the manual of MODBUS
®
MODBUS /RTU equipment side
RDA(+)
RDB(-)
SDA(+)
SDB(-)
®
/RTU equipment doesn't have SG. In this case, the wiring between GOT and SG is unnecessary.
®
/RTU equipment require the control line (CS, RS, etc.) to be controlled.
®
/RTU equipment, refer to the manual of MODBUS
®
MODBUS /RTU equipment side
®
/RTU equipment may differ from the example shown above. SDA/B(+/-) and RDA/
®
/RTU equipment doesn't have SG. In this case, the wiring between GOT and SG is unnecessary.
®
/RTU equipment, refer to the manual of MODBUS
*1*2*4
MODBUS
(1st)
SG
®
/RTU equipment manual.
terminating resistor. ( 1.4.3 Terminating resistors of GOT)
*1*2*4
MODBUS
(1st)
SG
®
/RTU equipment manual.
*1*2*4
MODBUS
(1st)
(+)
(-)
SG
4. MODBUS(R)/RTU CONNECTION
4.3 Connection Diagram
® *1*2*4
/RTU equipment side
(2nd)
RDA(+)
RDB(-)
SDA(+)
SDB(-)
SG
®
/RTU equipment to be used.
® *1*2*4
/RTU equipment side
(2nd)
RDA(+)
RDB(-)
SDA(+)
SDB(-)
SG
®
/RTU equipment to be used.
® *1*2*4
/RTU equipment side
(2nd)
(+)
(-)
SG
®
/
®
/RTU equipment to be used.
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