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Mitsubishi Electric GOT1000 Series Connection Manual Page 238

Microcomputers, modbus products, peripherals.
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RS422/485 cable 2) (2 pair wiring)
CON side(14 pin)
SDA1(TXD1+) *5
1
SDB1(TXD1-) *5
R
2
*3
RDA1(RXD1+) *5
3
R
*5
RDB1(RXD1-)
4
*3
SG
13
SDA2(TXD2+)
5
SDB2(TXD2-)
6
RDA2(RXD2+)
7
RDB2(RXD2-)
8
RSA(RTS+)
9
RSB(RTS-)
10
CSA(CTS+)
11
CSB(CTS-)
12
NC
14
Shell
*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. Set the terminating resistor selector of the main unit to "Disable" and connect a 330
terminating resistor. (
*4
For the terminating resistor of MODBUS
*5
Use the twisted pair cable for SDA1/SDB1 and RDA1/RDB1.
RS422/485 cable 2) (1 pair wiring)
CON side(14 pin)
SDA1(TXD1+) *5
1
*5
SDB1(TXD1-)
2
RDA1(RXD1+)
3
R
RDB1(RXD1-)
4
*3
SG
13
SDA2(TXD2+)
5
SDB2(TXD2-)
6
RDA2(RXD2+)
7
RDB2(RXD2-)
8
RSA(RTS+)
9
RSB(RTS-)
10
CSA(CTS+)
11
CSB(CTS-)
12
NC
14
Shell
*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
A terminating resistor is required. Set the terminating resistor selector of the main unit to "Disable" and connect a 110
terminating resistor. (
*4
For the terminating resistor of MODBUS
*5
Use the twisted pair cable for SDA1/SDB1.
4 - 6
4. MODBUS(R)/RTU CONNECTION
4.3 Connection Diagram
*3
®
/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.
1.4.3 Terminating resistors of GOT)
®
*3
®
/RTU equipment doesn't have SG. In this case, the wiring between GOT and SG is unnecessary.
1.4.3 Terminating resistors of GOT)
®
®
MODBUS
/RTU equipment side
RDA(+)
RDB(-)
SDA(+)
SDB(-)
SG
®
/RTU equipment manual.
/RTU equipment, refer to the manual of MODBUS
®
MODBUS
/RTU equipment side
(+)
(-)
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 to be used.
*1*2*4
®
MODBUS
/RTU equipment side
®
/RTU equipment to be used.
*1*2*4
SG
*1*2*4
(+)
(-)
SG
®
/

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