Mitsubishi Electronics SW3D5C-ACT-E ユーザーズマニュアル
APP - 25 APP - 25
MELSOFT
APPENDICES
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.
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 330
(For 2-pair wiring, use the terminal resistance of 330
Ω, 1/4W.)
For the FX
3G
-485-BD, FX
3U
-485-BD and FX
3U
-485ADP, terminal resistances are
built in.
Set the terminal resistance by the setting switch.
For the FX
Set the terminal resistance by the setting switch.
For the FX
ON
-485ADP, FX
1N
-485-BD, FX
2N
-485-BD, and FX
2NC
-485ADP use the
provided terminal resistances.
*2: Make sure to ground the shield connected to the FX
1N
-485-BD, FX
2N
-485-BD,
FX
2NC
-485ADP, FX
3G
-485-BD, FX
3U
-485-BD, FX
3U
-485ADP.
*3: Make sure to connect the FG terminal to the ground terminal of the grounded
programmable controller.