Mitsubishi Electric FX3U-232-BD User Manual page 216

FX Series PLC User's Manual - Data Communication Edition
Parallel Link
3. Switching of 1 pair / 2 paired wiring (FX
The FX -485-BD-RJ has a built-in wiring circuit switch.
3G
Set the wiring circuit switch to 1 pair / 2 pair.
4.3.2 For FX , FX
1S
1. In the case of one-pair wiring
FX -485ADP
2NC
SDA
(TXD+)
SDB
Terminal
(TXD-)
resistor
110 
RDA
(RXD+)
RDB
(RXD-)

SG
*1. Make sure to perform Class-D grounding on the shield of a twisted pair cable connected to
the FX
2N
*2. Make sure to connect the
Class-D grounding.
If the grounding terminal is not provided in the PLC, perform Class-D grounding directly.
C-30
Wiring circuit
switch
, FX , FX and FX
1N 1NC 2N
FX -485-BD
2N
FX -485-BD FX -485ADP
1N 0N
SDA SDA
(TXD+) (TXD+)
SDB SDB
(TXD-) (TXD-)
RDA RDA
(RXD+) (RXD+)
RDB RDB
(RXD-) (RXD-)
LINK
SG
SG
FG
-485-BD, FX -485-BD or FX
1N
terminal to the
FG
-485-BD-RJ)
3G
PLCs
2NC
FX -485ADP
0N
SDA
(TXD+)
SDB
(TXD-)
RDA
(RXD+)
RDB
(RXD-)
LINK
SG
FG
Class-D grounding (resistance: 100  or less)
-485ADP.
2NC
(grounding) terminal in the PLC requiring
4.3 Connection Diagram
FX -485-BD
2N
FX -485-BD FX
1N
SDA SDA
(TXD+) (TXD+)
SDB SDB
(TXD-) (TXD-)
RDA RDA
(RXD+) (RXD+)
RDB RDB
(RXD-) (RXD-)
SG
*2
*1
4 Wiring
-485ADP
2NC
Terminal
resistor
110 

SG