Mitsubishi FX3UC SERIES User Manual page 156

FX Series Programmable Controllers
3UC
User's Manual - Hardware Edition
5.4.3 Example of external wiring
Do not bind or lay wires near the AC input wiring and/or DC input wiring.
Assure a distance of 100mm (3.93") or more between the wires. Without wire separation, wires are easily
affected by noise and power surges.
FX -32MT/D
3UC
DC/DC
converter
DC
DC
5V 24V
FX extension block
2NC
(Dedicated to sink
input types only)
Photocoupler
FX
FX -8EX-UA1/UL
2N
WIRING PRECAUTIONS
• Before cleaning or retightening terminals cut off all phases of the power supply externally.
Failure to do so may cause electric shock.
150
+
-
Photo-
coupler COM
X000
X001
Input
impedance
Power
connector
+
-
COM
4.3kΩ
X 0
X 1
X 2
X 3
Input
terminal
-CNV-IF
2NC
COM
X 1
Photo- X 2
coupler
X 3
X 4
5.4 AC input [FX2N-8EX-UA1/UL, FX0N-8EX-UA1/UL]
Power
Fuse
connector
24V DC
*
Input
terminal
Two-wire
proximity
sensor
Fuse
MC
Do not take input signals from loads
generating surge.
Input
terminal
5 Input Specifications and External wiring
* Class D grounding
The grounding resistance should be
100Ω or less.
Handle the power supply
circuit correctly in
accordance with Chapter
4 "Power supply
specifications and
external wiring."
Three-
wire
sensor
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.)