Honeywell 2MLI-D28A-CC Digital Input Module

The Honeywell 2MLI-D28A-CC is a high-performance digital input module designed to integrate seamlessly into the Honeywell TDC 3000 Distributed Control System (DCS). It serves as a vital component in converting discrete field signals into data that the control system can process for automation and monitoring tasks.

This module provides 32 digital input channels, allowing extensive monitoring of on/off status signals from various field devices such as switches, sensors, and relays. Built to withstand the challenging conditions of industrial environments, the 2MLI-D28A-CC offers robust electrical isolation and noise immunity to ensure signal integrity.

Thanks to its modular design, the 2MLI-D28A-CC fits efficiently into Honeywell system racks and supports hot-swapping, enabling maintenance or replacement without disrupting system operation. It is widely employed in sectors where reliable digital signal acquisition is crucial for process control, safety, and operational efficiency.

Product Specifications

Applications

The 2MLI-D28A-CC Digital Input Module is used across a variety of industrial automation and control environments, including:

• Distributed Control Systems (DCS): Integral for digital signal monitoring within Honeywell TDC 3000 and similar systems.

• Oil & Gas Industry: Monitoring safety interlocks, valve positions, emergency shutdown signals, and equipment statuses.

• Chemical and Petrochemical Plants: Continuous monitoring of discrete events such as pump on/off states and alarm statuses.

• Power Plants: Monitoring breaker statuses, protective relay signals, and other critical digital inputs.

• Water and Wastewater Treatment: Control and monitoring of pump operation, valve actuation, and level detection switches.

• Manufacturing and Automation: Capturing machine status, emergency stops, and discrete sensor outputs for automated production lines.

Advantages and Key Features

• High Channel Count: Provides 32 digital input points per module, maximizing system input capacity while minimizing rack space usage.

• Optical Isolation: Each input channel is optically isolated, protecting the system from electrical interference and transient spikes.

• Versatile Input Compatibility: Supports a wide range of discrete signals including dry contacts and 24 V DC voltage inputs.

• Fast Signal Response: Ensures less than 10 milliseconds delay for rapid detection and response to field status changes.

• Hot-Swappable Modular Design: Enables easy replacement or upgrade without shutting down the entire control system.

• Robust Industrial Grade Construction: Designed for reliable operation in harsh environments with varying temperatures and humidity.

• Comprehensive Diagnostics: Integrated diagnostics support quick fault detection and maintenance, improving system uptime.

• Compliance and Safety: Meets CE and UL certifications, ensuring safety, quality, and regulatory compliance.

Frequently Asked Questions (FAQ)

1. How many digital inputs does the 2MLI-D28A-CC support?

   It supports 32 digital input channels.

2. What types of input signals are compatible with this module?

   It accepts dry contacts, voltage-free contacts, and 24 V DC signals.

3. Is the 2MLI-D28A-CC module hot-swappable?

   Yes, it can be removed or installed without powering down the system.

4. What is the typical response time for input signals?

   The response time is less than 10 milliseconds.

5. Does each input have electrical isolation?

   Yes, every channel is optically isolated.

6. What environmental conditions can this module operate under?

   It operates between 0°C and 60°C with relative humidity up to 95%, non-condensing.

7. Is this module certified for industrial use?

   Yes, it carries CE certification and UL recognition.

8. What are the physical dimensions and weight of this module?

   Dimensions are 22 x 124 x 126 mm, weighing 0.15 kg.

9. Can the module be used in other Honeywell systems beyond TDC 3000?

   It is designed primarily for TDC 3000 but may be compatible with other Honeywell architectures.

10. What diagnostic features does this digital input module offer?

    It supports channel-level diagnostics and fault detection for maintenance purposes.