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9 Input Wiring Procedures
9.2 24 V DC input (Sink and source input type)
80
FX3S Series Programmable Controllers
User's Manual - Hardware Edition
9.2.3 Examples of external wiring [AC power type]
1. Sink input
2. Source input
*1. Handle the power supply circuit correctly in accordance with Chapter 8 "Preparation for Wiring and
Power Supply Wiring Procedures."
*2. For an input device having a parallel resistance or a two-wire proximity switch, a bleeder resistance
may be required.
*3. In the case of sink input wiring, short-circuit the [S/S] terminal and the [24V] terminal of the main unit.
In the case of source input wiring, short-circuit the [S/S] terminal and the [0V] terminal of the main unit.
*4. The "0V" and "24V" terminals are located on the output terminal side.
For details on the terminal layout, refer to Section 4.7.
X0
S/S
0V
24V
N
L
X2
X1
Main unit
Fuse
Class D
grounding
Input
impedance
Input
terminal
Three-wire
sensor
*1
*3
*2
Two-wire
proximity sensor
*4
*4
0 V
24 V
Main unit
Fuse
Class D
grounding
Input
impedance
Input
terminal
Three-wire
sensor
*1
*3
*2
Two-wire
proximity sensor
*4
*4
0 V
24 V
X0
S/S
0V
24V
N
L
X2
X1