Mitsubishi Electric GOT2000 Series Connection Manual page 251

■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
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. 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
*2 Some MODBUS
Make sure to connect the cables and wires as described in the MODBUS
*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
*3
MODBUS
®
/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
*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.
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
/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
/RTU equipment side
(1st)
RDA(+)
RDB(-)
SDA(+)
SDB(-)
SG
®
/RTU equipment manual.
/RTU equipment, refer to the manual of MODBUS
5.3 Connection Diagram
®
MODBUS /RTU equipment side
(+)
(-)
SG
®
/RTU equipment to be used.
® *1*2*4
MODBUS /RTU equipment side
(2nd)
RDA(+)
RDB(-)
SDA(+)
SDB(-)
SG
®
/RTU equipment to be used.
*1*2*4
5
®
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