2MLI-D21A

Product Overview

2MLI-D21A is an 8-point DC24V digital input module with photo-coupler isolation designed for reliable signal acquisition in source/sink input configurations.

Technical Specifications

Input point: 8 point
Isolation method: Photo coupler isolation
Rated input voltage: DC24V
Rated input current: About 4 mA
Operation voltage range: DC20.4–28.8V (ripple rate < 5%)
Input derating: None

On voltage/current: DC19V or higher / 3 mA or higher
Off voltage/current: DC11V or lower / 1.7 mA or lower
Input resistance: About 5.6 kΩ

Response time (Off → On): 1 / 3 / 5 / 10 / 20 / 70 / 100 ms (set by CPU parameter, default 3 ms)
Response time (On → Off): 1 / 3 / 5 / 10 / 20 / 70 / 100 ms (set by CPU parameter, default 3 ms)

Isolation voltage: AC560V rms / 3 cycles (altitude 2000 m)
Isolation resistance: 10 MΩ or more (megger test)
Common method: 8 point / COM

Proper cable size: Twisted pair 0.3–0.75 mm² (external diameter ≤ 2.8 mm)
Proper terminal type: R1.25-3 (sleeve-attached compressed terminals not allowed)
Current consumption: 20 mA

Operation indicator: Input ON LED indicator
External connection method: 9-point terminal block connector (M3 × 6 screw)
Weight: 0.1 kg

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