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FX Series PLC User's Manual - Data Communication Edition
Computer Link
4.4
Connection Diagram for RS-232C
Representative wiring examples are shown in this section. When pin numbers in the external equipment are
different, wire the pins as shown below.
4.4.1
Connection diagram between FX PLC and personal computer
FX
-232-BD
3U
FX
-232-BD
3G
Name
FX
-232-BD
2N
FX
-232-BD
1N
FX
-232ADP(-MB)
3U
FG
RD(RXD)
SD(TXD)
ER(DTR)
SG(GND)
DR(DSR)
4.4.2
Connection diagram between FX-485PC-IF and personal computer
485PC-IF
Signal name
SD (TXD)
RD (RXD)
RS (RTS)
CS (CTS)
DR (DSR)
SG (GND)
ER (DTR)
D-34
PLC side
FX
-
FX
-
2NC
0N
232ADP FX-232ADP
232ADP
2
3
4
5
6
Pin No.
2
3
4
5
6
7
20
External equipment operating in accordance
Name
1
FG
3
RD(RXD)
2
SD(TXD)
20
RS(RTS)
7
SG(GND)
6
CS(CTS)
Personal computer
Signal name
SD (TXD)
RD (RXD)
RS (RTS)
CS (CTS)
DR (DSR)
SG (GND)
ER (DTR)
4.4 Connection Diagram for RS-232C
with RS-232C
When CS and
When DR and
RS are used
ER are used
Name
9-pin
25-pin
9-pin
D-Sub
D-Sub
D-Sub
1
FG
2
3
RD(RXD)
3
2
SD(TXD)
7
4
ER(DTR)
5
7
SG(GND)
8
5
DR(DSR)
4 Wiring
25-pin
D-Sub
1
2
3
3
2
4
20
5
7
6
6
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