Mitsubishi FX3UC SERIES User Manual page 147

FX Series Programmable Controllers
3UC
User's Manual - Hardware Edition
2. Input circuit
The primary and secondary circuits for input are insulated with a photocoupler, and the second circuit is
provided with a C-R filter.
The C-R filter is designed to prevent malfunctions caused by chattering of the input contact and noise from
the input line.
*1
X000 to X017 have digital filters, and the filter time can be changed in increments of 1ms in the range from
0 to 60ms through applied instructions. When 0 is specified for the time, the input filter values are set as
shown in the following table.
Input number
X000 to X005
X006, X007
X010 to X017
*1. X000 to X007 in the FX
*2. When setting the input filter to 5µs or capturing pulses of a response frequency of 50 to 100kHz with a
high-speed counter, wire the terminals as stated below.
- The wiring length should be 5m or less.
- Connect a bleeder resistance of 1.5kΩ (1W or more) to the input terminal, so that the sum of the
load current of the open collector transistor output on the mating device and the input current of the
main body is 20mA or more.
3. Input sensitivity
The Main units input current and input sensitivity are shown in the following table.
When DC diodes or resistors are provided at input contacts or when parallel resistors or leakage current are
present at input contacts, perform wiring in accordance with Subsection 5.2.4.
Item
Input voltage
Input current
Input sensitivity
current
Input filter value when 0 is specified
5 µs
50 µs
200 µs
-16M .
3UC
→ For wiring of the input interrupt, pulse catch, or the rotary encoder, refer to
X000 to X005
24V DC +20% -15% Ripple Voltage (p-p) 5% or less
6mA
ON 3.5mA or more
OFF 1.5mA or less
5 Input Specifications and External wiring
*2
X006, X007 X010 or more
7mA 5mA
4.5mA or more 3.5mA or more
1.5mA or less 1.5mA or less
5.2 24V DC Input Type
Section 7.2 and 7.3.
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