Product Overview

The Honeywell MLI-DN32U/DC is an integrated, high-density CPU and Base Module designed for the MasterLogic 50 series Programmable Logic Controller (PLC) platform. This unit serves as an all-in-one automation hub, combining 32k steps of program logic processing with a versatile array of onboard digital and analog I/O. Engineered for decentralized control and small-to-mid-scale industrial processes, the MLI-DN32U/DC provides a compact, cost-effective solution for facilities requiring high-speed execution and reliable signal conditioning. Its architecture supports sophisticated control modes, including cyclic and interrupt scans, ensuring deterministic performance in time-critical environments.

Technical Hardware Specifications

• Model Designation: MLI-DN32U/DC

• Operating Voltage: 24V DC

• Integrated Digital Inputs: 16 Points (24V DC)

• Integrated Digital Outputs: 16 Points (Open-Collector Sink)

• Onboard Analog Capacity: 4 Inputs / 4 Outputs

• Analog Signal Support: 0-10V, 1-5V, 0-20mA, 4-20mA

• Logic Memory: 384kB (32,000 Step Capacity)

• Expansion Capability: Supports up to 7 additional modules (max 256 I/O points)

• Network Interfacing: Dual FENET and 2SNET communication ports

• Circuit Protection: Photo-coupler isolation and Zener diode surge suppression

• Load Rating: 0.5A maximum current per output point

Industrial Process Applications

The MLI-DN32U/DC excels in automation scenarios where digital logic and precision analog control must coexist in a space-constrained environment. Its hybrid I/O configuration makes it a primary choice for various technical sectors.

• Integrated Machinery Control: Managing complex logic and variable speed drives via onboard analog outputs for packaging or assembly lines.

• Environmental Monitoring Systems: Utilizing the four analog inputs to track temperature, pressure, or flow sensors while simultaneously managing digital alarms and actuators.

• Remote Telemetry Units (RTU): Serving as a distributed controller that communicates with central DCS via Ethernet or serial protocols while handling localized logic autonomously.

• Pumping and Valve Automation: Providing reliable switching of solenoids through open-collector outputs, featuring low leakage current and high inrush handling for industrial-grade reliability.