148
FX3UC Series Programmable Controllers
User’s Manual - Hardware Edition
5 Input Specifications and External wiring
5.3 5V Input [FX2N-16EXL-C]
5.3.3 Example of external wiring
Use shielded wires for wiring the 5V DC.
WIRING PRECAUTIONS
• Before cleaning or retightening terminals cut off all phases of the power supply externally.
Failure to do so may cause electric shock.
FX
3UC
-32MT/D
+
-
COM
X000
X001
Input
impedance
5V 24V
FX
2NC
extension block
(Dedicated to sink
input types only)
COM
X
0
X
1
X
2
X
3
+
-
FX
2NC
-CNV-IF
24V DC
Input
terminal
*
DC/DC
converter
DC
DC
X000
FX
2N
-16EXL-C
5+
2.2k
Ω
Input impedance
X007
TTL
External unit
X001
Input
terminal
5V DC
* Class D grounding
The grounding resistance should be
100
Ω
or less.
*
Power
connector
Power
connector
Fuse
Three-
wire
sensor
Two-wire
proximity
sensor
Photocoupler
Photocoupler
Photo-
coupler
4.3(k
Ω
)
2.2k
Ω
Input impedance
For an input device having a
parallel resistance or a
two-wire proximity switch, a
bleeder resistance may be
required.
(Refer to Subsection 5.2.4.)
Handle the power supply
circuit correctly in
accordance with Chapter
4 "Power supply
specifications and
external wiring."
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