Product Overview

The Honeywell MLC−DR64H/DC is a high-density, integrated processing and interface unit specifically developed for the MasterLogic ML50 PLC architecture. This module serves as a consolidated control hub, merging a powerful CPU with a comprehensive 64-point digital I/O array. By housing 32 discrete DC inputs and 32 heavy-duty relay outputs within a single compact chassis, the MLC−DR64H/DC eliminates the need for multiple expansion cards, significantly reducing the physical footprint of the control system. It is engineered to provide deterministic logic execution and robust switching capabilities, making it an ideal cornerstone for decentralized automation where cabinet space is restricted but high point counts are required.

Technical Hardware Profiles and Physical Data

• Module Architecture: Integrated PLC CPU with High-Density I/O

• Input Configuration: 32 Channels, 24V DC Sink/Source

• Output Configuration: 32 Channels, Mechanical Relay Contacts

• Logic Solve Time: High-speed micro-processing for real-time control

• Input Voltage: DC-powered internal electronics

• Contact Rating: High-current switching suitable for inductive loads

• Mass Weight: 0.4 kg

• Casing Dimensions: 7 x 14 x 14.5 cm

• HS Code Efficiency: 8537101190

• System Family: MasterLogic ML50 Series

• Manufacturing Region: USA

Industrial Operational Scenarios

The MLC−DR64H/DC excels in mid-sized industrial applications such as water treatment skids, HVAC plant control, and conveyor sortation systems. Because the 32 output channels utilize mechanical relays rather than transistors, this module can directly drive diverse field devices—including 110V/220V AC solenoid valves, motor starters, and high-intensity signal beacons—without the need for interposing relays. Its 32 digital inputs are optimized for standard 24V sensors and limit switches, providing a perfectly balanced ratio for machine-level automation. The ruggedized American-made hardware ensures that the MasterLogic system maintains high availability in environments subject to electrical noise or mechanical vibration, streamlining both the initial wiring phase and long-term diagnostic maintenance.

FAQ

Q: Can the MLC−DR64H/DC be expanded if I need more than 64 points?

A: Yes, while this unit provides a high-density base, it is part of the MasterLogic ML50 family and supports additional expansion modules through the integrated bus interface to scale with your project needs.

Q: What is the benefit of relay outputs over transistor outputs for this module?

A: Relay outputs provide dry contacts that can switch either AC or DC voltages and typically handle higher current loads. This allows the MLC−DR64H/DC to interface directly with actuators that operate on different voltage levels than the PLC itself.

Q: Is the 24V DC power supply for the inputs provided by the module?

A: Typically, the module requires an external 24V DC power source to energize the input loops and internal logic, ensuring galvanic isolation between the field sensors and the processor.

Q: Does this module require specialized mounting hardware?

A: No, the MLC−DR64H/DC is designed for standard industrial DIN-rail mounting, allowing it to be easily integrated into existing electrical enclosures alongside breakers and contactors.

Q: How do the "H" and "DC" designations affect the model selection?

A: The "H" refers to the high-performance logic series, while "DC" indicates that the module's internal electronics are powered by a DC source, making it suitable for battery-backed or low-voltage control cabinets.