2MLI-D21A | Honeywell | Digital Input Module

Description

The 2MLI-D21A is an 8-point digital input module with photo coupler isolation. It provides reliable DC24V input signal processing with fast response times, ensuring stable operation in industrial automation systems.

Specifications

• Input Points: 8 channels

• Isolation Method: Photo coupler isolation

• Rated Input Voltage: DC24V

• Rated Input Current: ~4 mA

• Operating Voltage Range: DC20.4–28.8V (ripple < 5%)

• On Voltage/Current: ≥ DC19V / ≥ 3 mA

• Off Voltage/Current: ≤ DC11V / ≤ 1.7 mA

• Input Resistance: ~5.6 kΩ

• Response Time (Off → On): 1–100 ms (CPU parameter selectable, default 3 ms)

• Response Time (On → Off): 1–100 ms (CPU parameter selectable, default 3 ms)

• Isolation Voltage: AC560V rms / 3 cycles (altitude ≤ 2000 m)

• Isolation Resistance: ≥ 10 MΩ (megger test)

• Common Method: 8 points per COM

• Cable Size: Twisted pair 0.3–0.75 mm² (Ø ≤ 2.8 mm)

• Terminal Type: R1.25-3 (no sleeve attached terminals allowed)

• Current Consumption: 20 mA

• Operation Indicator: LED ON when input active

• External Connection: 9-point terminal block connector (M3 × 6 screw)

• Weight: 0.1 kg

Features

• Compact Design: Lightweight 0.1 kg module for easy installation

• Fast Response: Adjustable response times from 1 ms to 100 ms via CPU parameters

• High Isolation: AC560V isolation voltage and ≥10 MΩ resistance for reliable signal separation

• Flexible Wiring: Supports twisted pair cables and standard compressed terminals

• Clear Status Indication: LED indicator for input ON state

• Industrial Reliability: Stable performance under high humidity (95% at 60 °C) and up to 2000 m altitude