Two-Pair Wiring - Mitsubishi Electric MELSEC FX Series User Manual

FX communication
3.3.4

Two-pair Wiring

RS-422/RS-485 unit *4
R*1
SDA
SDB
R*1
RDA
RDB
SG
Note:
*1 R is a terminating resistor (330Ω)
*2 Make sure to connect the shield of the appropriate cable with the FX
or FX -485ADP to ground that has a resistance of 100Ω or less (Class D grounding).
2NC
*3 Make sure to connect the terminal FG to the ground terminal
controller grounded with resistance of 100Ω or less (Class D grounding).
However, for a computer link unit of the A series programmable controller, see the manual of
the computer link unit.
*4 When using an RS-232C/485 converter, use the FX-485PC-IF.
*5 In the case of FX
FX -485ADP
2NC
FX -485-BD,FX -485-BD
1N 2N
Station
No. 0
SDA
SDB
RDA
RDB
(NC)*5
SG
*2
Class D grounding
-485ADP
2NC
A series programmable
FX -485ADP
controller's computer link unit
(0N)
Station
No. 1
SDA
SDB
RDA
RDB
LINK
SG
*3
FG
2N
Wiring 3
Station
No. 15 R*1
SDA
SDB
R*1
RDA
RDB
SG
*3
FG
-485-BD, FX -485-BD
1N
of a programmable
3-8