Instructions For Connecting Input Devices - Mitsubishi Electric MELSEQ FX3S Series User Manual

FX Series Programmable Controllers
3S
User's Manual - Hardware Edition
3. Input sensitivity
The PLC input current and input sensitivity are shown in the following table.
When there is a series diode or resistance at the input contact or there is a parallel resistance or leakage
current at the input contact, wire the terminals in accordance with the Subsection 9.2.2.
Item
Input signal voltage
Input signal current
Input sensitivity current
9.2.2

Instructions for connecting input devices

1. In the case of no-voltage contact
The input current of this PLC is 7 mA/24 V DC. (5 mA/24 V DC in X010 or later)
Use input devices applicable to this minute current.
If no-voltage contacts (switches) for large current are used, contact failure may occur.
Input number
X000 to X007
X010 to X017
<Example> Products of OMRON
Type
Microswitch
Proximity switch
2. In the case of input device with built-in series diode
The voltage drop of the series diode should be approx. 4 V or less.
When lead switches with a series LED are used, up to two switches can be connected in series.
Also make sure that the input current is over the input-sensing level while the switches are ON.
PLC
(Sink input)
78
X000 to X007
ON 4.5 mA or more
OFF
Input current
7 mA/24 V DC
5 mA/24 V DC
Model name
Models Z, V and D2RV
Model TL
24V
S/S
LED
X
0V
AC power type: 24 V DC ± 10 %
DC power type: 20.4-26.4 V DC
7 mA
1.5 mA or less
Type
Operation switch
Photoelectric switch
S/S
PLC
(Source input)
24V
9 Input Wiring Procedures
9.2 24 V DC input (Sink and source input type)
X010 to X017
5 mA
3.5 mA or more
Model name
Model A3P
Model E3S
0V
LED
X