Mitsubishi FX3UC Series - Page 150

144
FX3UC Series Programmable Controllers
User’s Manual - Hardware Edition
5 Input Specifications and External wiring
5.2 24V DC Input Type
5.2.5 Examples of external wiring
1. Examples of wiring (Dedicated to sink input types only)
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
FX 2NC extension block
(Dedicated to sink
input types only)
FX 3UC -1PS-5V
+
-
COM
X000
X001
Photo-
coupler
Input
impedance
5V 24V
COM
X 0
X 1
X 2
X 3
+
-
4.3k Ω
+
-
24V DC
Three-
wire
sensor
Input
terminal
Two-wire
proximity
sensor
FX 2N extension block
(Dedicated to sink
input types only)
24+
X 0
X 1
X 2
X 3
*
DC/DC
converter
DC
DC
Input
terminal
* Class D grounding
The grounding resistance should be
100
Ω or less.
Power
connector
Power
connector
Power
connector
Input
terminal
Fuse
5V 24V
DC/DC
converter
DC
DC
Photocoupler
Photocoupler
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."