Mitsubishi Electric GOT2000 Series Connection Manual page 292

7.3.2 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.
■1. Connection diagram
(1) RS-422/485 connection diagram 1)
GOT side(slave)
(2nd)
SDA1(TXD1+) *5
6
R SDB1(TXD1-) *5
8
*3
RDA1(RXD1+) *5
10
R RDB1(RXD1-) *5
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
*2
*3
*4
*5
7 - 6
7.3 Connection Diagram
*3
Some MODBUS/RTU master equipment don't have SG. In this case, the wiring between GOT and SG is unnecessary.
Some MODBUS/RTU master equipment require the control line (CS, RS, etc.) to be controlled. Make sure to connect the cables
and wires as described in the MODBUS/RTU master equipment manual.
A terminating resistor is required for the terminal GOT. Set the terminating resistor selector of the main unit to "Disable" and
connect a 110 Ω terminating resistor.
➠
1.4.3 Terminating resistors of GOT
For the terminating resistor of MODBUS/RTU master equipment, refer to the manual of MODBUS/RTU master equipment to be
used.
Use the twisted pair cable for SDA1/SDB1 and RDA1/RDB1.
GOT side(slave) *3
(1st)
SDA1(TXD1+) *5
6
SDB1(TXD1-) *5
8
RDA1(RXD1+) *5
10
RDB1(RXD1-) *5
12
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
MODBUS /RTU master equipment side
RDA(+)
RDB(-)
SDA(+)
SDB(-)
SG
*1*2*4