Mitsubishi Electric MELSEC FX Series - Using FX 2 N -232 IF

FX communication
Wiring 3
3-4
3.2.2 Using FX
2N
-232IF
The signal wiring of the RS-232C equipment varies depending on the RS-232C connection
specifications. Check the specifications of the RS-232C equipment used, then connect the
signals correctly. Representative wiring examples are shown below.
1 ) Terminal specification device (No control line)
Setting communication format (BFM #0); b9=0, b8=0
Communication is performed in
accordance with the condition
determined by the software in
the FX
2N
-232IF and the
counterpart equipment.
2 ) Terminal specification device (Use control line)
a ) Standard RS-232C mode (Use cross cable)
Setting communication format (BFM #0); b9=0, b8=1
As the carrier to send (CS)
signal pin of the FX
2N
-232IF
itself receives the request to
send (RS) signal, signal transfer
is performed as if the
counterpart equipment is
functioning.
Note:
*1 When the CD signal is not monitored, the CD signal pin is not required to be connected.
With regard to the CD signal, the FX
2N
-232IF only indicates the status.
*2 The FX
2N
-232IF only indicates the status.
Programmable Controller Side
Signal
name
RD (RXD)
SD (TXD)
SG (GND)
FX
2N
-232IF
2
3
5
RS-232C Device Side
Signal
name
RD (RXD)
SD (TXD)
SG (GND)
2
3
5
9-pin
D-SUB
25-pin
D-SUB
3
2
7
Programmable Controller Side
Signal
name
RD (RXD)
SD (TXD)
RS (RTS)
FX
2N
-232IF
2
3
7
RS-232C Device Side
Signal
name
2
3
7
9-pin
D-SUB
25-pin
D-SUB
3
2
4
CD (DCD)
CS (CTS)
ER (DTR)
1
8
4
1
8
4
8
5
20
6
5
6
7
DR (DTR)
SG (GND)
6
5
RD (RXD)
SD (TXD)
RS (RTS)
CD (DCD)
CS (CTS)
ER (DTR)
DR (DTR)
SG (GND)
*1 *1
*2 *2