User`s manual

FX communication
Wiring 3
3-8
3.3.4 Two-pair Wiring
Note:
*1 R is a terminating resistor (330
Ω
)
*2 Make sure to connect the shield of the appropriate cable with the FX
2N
-485-BD, FX
1N
-485-BD
or FX
2NC
-485ADP to ground that has a resistance of 100
Ω
or less (Class D grounding).
*3 Make sure to connect the terminal FG to the ground terminal of a programmable
controller grounded with resistance of 100
Ω
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
2NC
-485ADP
Class D grounding
R*1
R*1
SDA
SG
SG
*3
FG
Station
No. 1
Station
No. 0
SG
*3
FG
Station
No. 15
R*1
R*1
RS-422/RS-485 unit *4
SG
*2
(NC)*5
FX
2NC
-485ADP
FX
1N
-485-BD,FX
2N
-485-BD
FX
A series programmable
(0N)
-485ADP
controller's computer link unit
SDB
RDA
RDB
SDA
SDB
RDA
RDB
SDA
SDB
RDA
RDB
LINK
SDA
SDB
RDA
RDB