Rs-422/485 Cable - Mitsubishi Electric GOT1000 Series Connection Manual

4.3.2

RS-422/485 cable

The following shows the connection diagrams and connector specifications of the RS-422/485 cable used for connecting
the GOT to a PLC.
RS-422/485 cable 1) (2 pair wiring)
CON side(20 pin)
SDA1(TXD1+) *5
6
*5
R
SDB1(TXD1-)
8
*3 RDA1(RXD1+) *5
10
RDB1(RXD1-) *5
R
12
*3
SG
2
NC
1
NC
3
NC
4
SDA2(TXD2+)
5
SDB2(TXD2-)
7
RDA2(RXD2+)
9
RDB2(RXD2-)
11
NC
13
RSA(RTS+)
14
NC
15
RSB(RTS-)
16
NC
17
CSA(CTS+)
18
NC
19
CSB(CTS-)
20
*1 Some MODBUS
*2 Some MODBUS
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 110
terminating resistor. (
*4 For the terminating resistor of MODBUS
*5 Use the twisted pair cable for SDA1/SDB1 and RDA1/RDB1.
RS-422/485 cable 1) (1 pair wiring)
*3
CON side(20 pin)
SDA1(TXD1+) *5
6
SDB1(TXD1-) *5
8
RDA1(RXD1+)
10
R
RDB1(RXD1-)
12
*3
SG
2
NC
1
NC
3
NC
4
SDA2(TXD2+)
5
SDB2(TXD2-)
7
RDA2(RXD2+)
9
RDB2(RXD2-)
11
NC
13
RSA(RTS+)
14
NC
15
RSB(RTS-)
16
NC
17
CSA(CTS+)
18
NC
19
CSB(CTS-)
20
*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.
*3
MODBUS
®
/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. Make sure to connect the cables and
®
/RTU equipment manual.
1.4.3 Terminating resistors of GOT)
®
/RTU equipment, refer to the manual of MODBUS
MODBUS
®
/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.
1.4.3 Terminating resistors of GOT)
®
/RTU equipment, refer to the manual of MODBUS
*1*2*4
® /RTU equipment side
RDA(+)
RDB(-)
SDA(+)
SDB(-)
SG
® *1*2*4
/RTU equipment side
(+)
(-)
SG
4. MODBUS(R)/RTU CONNECTION
4.3 Connection Diagram
*1*2*4
MODBUS ® /RTU equipment side
RDA(+)
RDB(-)
SDA(+)
SDB(-)
SG
®
/RTU equipment to be used.
® *1*2*4
MODBUS /RTU equipment side
(+)
(-)
SG
®
/RTU equipment to be used.
4 - 5
1
2
3
4
5
6
7
8
®
/