Connection Diagram; Connection Diagram For Rs-232C; Connection Diagram For Rs-485 - Mitsubishi Electric MELSEC iQ-F FX5 User Manual

5.3

Connection Diagram

Representative wiring examples are shown in this section. When pin numbers in the counterpart equipment are different, wire
the pins as shown below.

Connection diagram for RS-232C

Name
FG
RD (RXD)
SD (TXD)
ER (DTR)
SG (GND)
DR (DSR)
*1 For third-party external equipment requiring the control signal, connect these pins.
The FX5-232-BD, FX5-232ADP does not require these pins to be connected.

Connection diagram for RS-485

One-pair wiring
Master
built-in RS-485 port
FX5-485-BD
FX5-485ADP
SDA
(TXD+)
SDB
Termination
(TXD-)
resistor:
110 
RDA
*2
(RXD+)
RDB
(RXD-)
SG
Class-D grounding
(resistance: 100  or less)
*1 Make sure to perform Class-D grounding on the shield of the twisted pair cable to be connected.
*2 Make sure to provide a termination resistor at each end of a line. Set the selector switch to 110  when the termination resistor is built in.
PLC
FX5-232-BD
FX5-232ADP Name
9-pin D-Sub
- FG
2 RD (RXD)
3 SD (TXD)
4 RS (RTS)
5 SG (GND)
*1
6 CS (CTS)
Slave
built-in RS-485 port
FX5-485-BD
FX5-485ADP
SDA
(TXD+)
SDB
(TXD-)
RDA
(RXD+)
RDB
(RXD-)
SG
Class-D grounding
(resistance: 100  or less)
*1
External equipment operating in
accordance with RS-232C
Using CS and RS Using DR and ER
Name
D-Sub D-Sub D-Sub
9-pin 25-pin 9-pin
- 1 FG -
2 3 RD (RXD) 2
3 2 SD (TXD) 3
7 4 ER (DTR) 4
5 7 SG (GND) 5
8 DR (DSR)
5 6
Slave
built-in RS-485 port
FX5-485-BD
FX5-485ADP
SDA
(TXD+)
SDB
(TXD-)
RDA
(RXD+)
RDB
(RXD-)
SG
Class-D grounding
(resistance: 100  or less)
*1
D-Sub
25-pin
1
3
2
20
7
6
Slave
built-in RS-485 port
FX5-485-BD
FX5-485ADP
SDA
(TXD+)
SDB
(TXD-)
Termination
resistor:
110 
RDA
*2
(RXD+)
RDB
(RXD-)
SG
*1
5 WIRING
5.3 Connection Diagram
5
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