5 Wiring
5.2 Power Supply Wiring
31
FX
3U
-20SSC-H Positioning Block User's Manual
1
Int
roduct
ion
2
Sy
stem
conf
igur
ati
on
3
Exam
ple
C
onnect
ion
4
Ins
tall
a
tion
5
Wi
rin
g
6
Me
m
o
ry
confi
gur
at
ion
and da
ta
7
Befor
e
star
ting
positi
oning
contr
o
l
8
M
anual c
ont
ro
l
9
Posit
ioni
ng
C
ont
rol
10
Table O
per
at
ion
5.2
Power Supply Wiring
5.2.1
Power supply wiring
Power-on timing
The 20SSC-H power supply should be turned ON simultaneously or before the PLC main unit. Before turning
the power OFF, ensure the safety of the system and then simultaneously turn the main unit, 20SSC-H, and
other extension equipment (the special extension equipment is included) OFF.
For details, refer to the following respective PLC manual.
→
Refer to the FX
3U
Hardware Edition
→
Refer to the FX
3UC
Hardware Edition
5.2.2
Grounding
Ground the cables as follows
• The grounding resistance should be 100
Ω
or less.
• Independent grounding should be established whenever possible.
Independent grounding should be performed for best results.
When independent grounding is not configured, perform "shared grounding" as shown in the following
figure.
For details, refer to the following respective PLC manual.
→
Refer to the FX
3U
Hardware Edition
→
Refer to the FX
3UC
Hardware Edition
• The grounding wire size should be AWG22-20 (0.3 to 0.5 mm
2
).
• The grounding point should be close to the PLC, and all grounding wires should be as short as possible.
20SSC-H
24V DC
+
Class D grounding
Red
Black
Green
PLC
PLC
PLC
Other
equipmemt
Other
equipmemt
Other
equipmemt
Independent grounding
Best condition
Shared grounding
Good condition
Shared grounding
Not allowed