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PPENDICES
Appendix 3.4 FX Series
The following shows the example of wiring a personal computer and the FX extended
port. For details of the FX-485PC-IF converter, refer to the FX SERIES USER’S
MANUAL-Data Communication Edition.
(1) Example of connecting a personal computer and FX-485PC-IF
converter with the RS-232 cable
Personal computer side FX-485PC-IF side
Signal name
Cable connection and signal direction
(Full-/Half-Duplex Communication)
Signal name Pin No.
SD(TXD) SD(TXD) 2
RD(RXD) RD(RXD) 3
RS(RTS) RS(RTS) 4
CS(CTS) CS(CTS) 5
DR(DSR) DR(DSR) 6
SG(GND) SG(GND) 7
ER(DTR) ER(DTR) 20
(2) Example of connecting the FX-485PC-IF converter and the FX
extended port (2-pair wiring)
R
*1
R*1
SDA
SDB
RDA
RDB
LINK SG
SDA
SDB
RDA
SG
SDA
SDB
RDA
SDA
SDB
RDA
RDB RDB RDB
FG
*3
FG
*3
R
R
*1
*1
*2
FX-485PC-IF FX
3U
-485ADP
FX
2N
-485-BD
FX
1N
-485-BD
FX
0N
-485ADP FX
0N
-485ADP
Grounding
LINK SG LINK SG
FX
3U
-485-BD
FX
2NC
-485ADP
FX
3G-485-BD
*1: R indicates a terminal resistance.
Make sure to install terminal resistances at both ends of the circuit.
(For 2-pair wiring, use the terminal resistance of 330Ω, 1/4W.)
For the FX
3G-485-BD, FX3U-485-BD and FX3U-485ADP, terminal resistances are
built in.
Set the terminal resistance by the setting switch.
For the FX
ON-485ADP, FX1N-485-BD, FX2N-485-BD, and FX2NC-485ADP use the
provided terminal resistances.
*2: Make sure to ground the shield connected to the FX
1N-485-BD, FX2N-485-BD,
FX
2NC-485ADP, FX3G-485-BD, FX3U-485-BD, FX3U-485ADP.
*3: Make sure to connect the FG terminal to the ground terminal of the grounded
programmable controller.