Termination Resistor Setting; Connection Diagram - Mitsubishi Electric FX5 User Manual

Termination resistor setting

Make sure to provide a termination resistor at both ends of the wire.
The built-in RS-485 port, FX5-485-BD and FX5-485ADP have a built-in termination resistor.
Set the termination resistor selector switch as below.
Wiring
Two-pair wiring
One-pair wiring
FX5U CPU module built-in RS-485 port
FX5-485-BD

Connection diagram

RS-232C
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 between FX5 and personal computer
PLC side
FX5-232ADP
Name FX5-232-BD
9-pin D-Sub (female)
RD (RXD) 2
SD (TXD) 3
ER (DTR) 4
SG (GND) 5
DR (DSR) 6
Termination
resistor selector
switch
Termination
resistor
selector switch
External equipment operating in accordance with RS-232C
Using CS/RS
Name
9-pin D-Sub
RD (RXD) 2
SD (TXD) 3
RS (RTS) 7
SG (GND) 5
CS (CTS) 8
Termination resistor selector switch
330 
110 
FX5UC CPU module built-in RS-485 port
FX5-485ADP
Using DR/ER
Name
9-pin D-Sub
RD (RXD) 2
SD (TXD) 3
ER (DTR) 4
SG (GND) 5
DR (DSR) 6
Termination
resistor selector
switch
Termination
resistor selector
switch
3 MC PROTOCOL
55
3.5 Wiring
3