Honeywell 2MLI-D28A Digital Input Module

Overview

The Honeywell 2MLI-D28A is a high-density 64-point digital input module built for MasterLogic-200 PLC systems. It supports 24V DC input signals and offers photo-coupler isolation for robust noise immunity and signal integrity. This module suits demanding industrial automation applications such as production line control, safety interlocks, and facility monitoring. Its compact size and reliable performance make integration simple and efficient.

Technical Specifications

General

• Model Number: 2MLI-D28A

• System Compatibility: MasterLogic-200 PLC

• Input Type: Digital input (source/sink)

• Number of Channels: 64

Electrical

• Rated Input Voltage: DC 24V

• Input Voltage Range: DC 20.4–28.8V (Ripple < 5%)

• Rated Input Current: Approx. 4 mA

• Input Resistance: Approx. 5.6 kΩ

• On Voltage / Current: ≥ DC 19V / ≥ 3 mA

• Off Voltage / Current: ≤ DC 11V / ≤ 1.7 mA

Isolation

• Isolation Method: Photo-coupler

• Isolation Voltage: AC 560V rms / 3 cycles

• Isolation Resistance: ≥ 10 MΩ

Performance

• Response Time: 1–100 ms (default: 3 ms)

• Common Grouping: 32 points per COM

• Current Consumption: Approx. 60 mA

Indicators & Connections

• Status Indicators: LED for each input channel

• External Connection: 40-pin connectors × 2

Environmental

• Operating Temperature: –20°C to +60°C

• Storage Temperature: –40°C to +85°C

• Humidity Range: 5% to 95% RH (non-condensing)

Mechanical

• Dimensions: Standard module size

• Weight: 0.15 kg