Product Overview

The Honeywell MLI-DR64H/D1 is a high-capacity, integrated I/O module designed for high-performance industrial automation and Distributed Control Systems (DCS). This module provides a dense configuration of 64 total points, split evenly between 32 digital inputs and 32 relay outputs. Engineered to operate on a flexible DC 12/24V power architecture, it serves as a central interface for managing large arrays of field sensors and high-power actuators within a single hardware footprint.

Designed for heavy-duty industrial environments, the MLI-DR64H/D1 offers significant electrical isolation and switching power. Its robust relay architecture allows it to drive significant loads without the need for interposing relays in many applications, simplifying cabinet wiring and reducing points of failure. Whether used as a standalone controller base or as part of an expanded PLC network, this module delivers the speed and durability required for mission-critical manufacturing and process control.

Technical Characteristics and Performance

• High-Density I/O Array: Combines 32 digital DC inputs and 32 mechanical relay outputs, providing a total of 64 points to maximize controller efficiency and minimize rack space.

• Superior Switching Capacity: Each relay output can manage up to DC24V at 2A (resistive) or AC220V at 2A. The common terminals support a substantial 5A capacity, suitable for heavy industrial solenoids and motor starters.

• Exceptional Mechanical Longevity: The relay contacts are rated for a mechanical lifespan exceeding 20 million cycles, ensuring long-term reliability in high-cycle applications.

• Ultra-Fast Instruction Processing: Optimized for high-speed logic execution with a base instruction speed of just 83 nanoseconds, facilitating near-instantaneous response to input transitions.

• Precision Signal Management: Maintains a very low off-state leakage current of only 0.1mA, ensuring clean signal breaks and preventing ghosting in sensitive control circuits.

• Robust Scalability: Supports extensive system expansion; when integrated with a main CPU, the architecture can scale up to 384 I/O points across seven expansion modules.

• High-Frequency Operation: Capable of sustaining up to 3,600 switching operations per hour, making it ideal for rapid-cycle process equipment.

Technical Specifications

• Manufacturer: Honeywell

• Model Number: MLI-DR64H/D1

• Input Points: 32 Channels (DC 12/24V)

• Output Points: 32 Channels (Relay Type)

• Switching Voltage: DC24V / AC220V

• Max Output Current: 2A per point / 5A per common

• Instruction Speed: 83ns

• Leakage Current: 0.1mA (Off-state)

• Mechanical Life: >20,000,000 Operations

• Weight: 0.4 kg

• Dimensions: 7 x 14 x 14.5 cm

• HS Code: 8537101190

• Country of Origin: USA

Industrial Application Areas

• Large-Scale Manufacturing: Controlling high-density sensor arrays on automotive assembly lines and complex packaging machinery.

• Process Plant Utilities: Managing motorized valves, heaters, and lighting contactors in pharmaceutical or chemical facilities.

• Material Handling: Coordinating multi-lane conveyor systems where high-speed logic and robust relay switching are required.

• Infrastructure Monitoring: Integrating diverse alarm and status inputs from distributed utility stations into a central DCS.