Mitsubishi Electric GOT2000 Series Connection Manual page 255

■2. RS-422/485 cable 2)
CON side(20 pin)
SDA1(TXD1+) *5
6
*5
SDB1(TXD1-)
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/RTU equipment may differ from the example shown above. SDA/B(+/-) and RDA/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/RTU equipment doesn't have SG. In this case, the wiring between GOT and SG is unnecessary.
*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/RTU equipment, refer to the manual of MODBUS/RTU equipment to be used.
*5 Use the twisted pair cable for SDA1/SDB1.
■3. RS-422/485 cable 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/RTU equipment doesn't have SG. In this case, the wiring between GOT and SG is unnecessary.
*2 Some MODBUS/RTU 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 equipment manual.
*3 A terminating resistor is required. For GT27, set the terminating resistor selector of the main unit to "Disable" and connect a
330
➠
*4 For the terminating resistor of MODBUS/RTU equipment, refer to the manual of MODBUS/RTU equipment to be used.
*3
MODBUS/RTU equipment side
1.4.3 Terminating resistors of GOT
MODBUS/RTU equipment side
*3
terminating resistor. For GT21, set the terminating resistor selector of the main unit to "330Ω".
1.4.3 Terminating resistors of GOT
*1*2*4
(+)
(-)
SG
*1*2*4
MODBUS/RTU equipment side
(1st)
RDA(+)
RDB(-)
SDA(+)
SDB(-)
SG
5.3 Connection Diagram
*1*2*4
MODBUS/RTU equipment side
(+)
(-)
SG
*1*2*4
(2nd)
RDA(+)
RDB(-)
SDA(+)
SDB(-)
SG
5 - 7
5