Rs-422/485 Cable - Mitsubishi Electric GOT2000 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.
(1) RS-422/485 cable 1) (2 pair wiring)
CON side(20 pin)
SDA1(TXD1+) *5
6
SDB1(TXD1-) *5
R
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.
*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
*1*2*4
®
/RTU equipment side MODBUS
RDA(+)
RDB(-)
SDA(+)
SDB(-)
SG
4. MODBUS(R)/RTU CONNECTION
4.3 Connection Diagram
*1*2*4
®
/RTU equipment side
RDA(+)
RDB(-)
SDA(+)
SDB(-)
SG
®
/RTU equipment to be used.
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