Mitsubishi FX3U-?*MR/ES User Manual page 202

FX Series Programmable Controllers
3U
User's Manual - Hardware Edition
Use of input/output extension units/blocks of sink input type
Sink and source
input type
Sink input type
*1 Handle the power supply circuit correctly according to Chapter 9 "Preparation for Wiring and Power Supply Wiring
Procedures."
*2 For an input device with a parallel resistance or a two-wire proximity switch, a bleeder resistance may be required.
*3 In case of sink input wiring, short-circuit the S/S terminal and the 24V terminal of the main unit.
194
Main unit
Input
impedance
5V 0V 24V
Input extension block
5V 0V 24V
Input / output powered extension unit
5V 0V 24V
Input extension block
5V 0V 24V
Special function block
5V 0V 24V
10 Input Wiring Procedures (Input Interruption and Pulse Catch)
10.2 24V DC Input Type (Common to Sink/Source Input)
L
N
Class D
*3
S/S
grounding
0V
0V
24V
24V
X0
X1
Input
terminal
24+
X0
X1
Input
terminal
L
N
COM
24V
24+
0V
X0
X1
Input
terminal
24+
X0
X1
Input
terminal
24+
24-
Fuse *1
Three-
wire
sensor
Two-wire
proximity
*2
sensor