Honeywell 2MLR-AC12 Power Supply Module

Product Introduction

The Honeywell 2MLR-AC12 supplies regulated DC power to MasterLogic-200 programmable logic controller systems. Specifically, this module accepts a 110 VAC input and delivers a stable 5 VDC output at 5.5 A, supporting a rated output power of 27.5 W at 55°C. Consequently, it powers the CPU, communication interfaces, and I/O cards mounted on the main base.

Engineers commonly install this power supply in process control, factory automation, and machine control cabinets. Furthermore, its high efficiency rating of 65% or higher reduces heat generation inside the enclosure. The unit also provides a RUN contact for system status monitoring, which simplifies diagnostics during commissioning and maintenance.

Technical Specifications

The following parameters define the input, output, and protection characteristics of the 2MLR-AC12 module.

Input Parameters

Output Parameters

Protection and Status Features

The module includes a built-in input fuse that users cannot replace. Specifically, the AC power fuse is rated 250 V/3.15 A (time-lag type, UL approved). Meanwhile, a voltage status LED illuminates when the output voltage is normal, giving technicians an immediate visual check.

RUN Contact Specifications

Mechanical and Environmental Parameters

The 2MLR-AC12 measures 55 × 95 × 90 mm (W×H×D) and weighs 326 g. Besides, the compact housing fits standard MasterLogic-200 rack positions without occupying excess cabinet space.

Wiring and Terminal Specifications

The module accepts cable sizes from 0.75 to 2 mm². Additionally, compatible clamped terminals include RAV1.25-3.5 and RAV2-3.5, which ensure secure and vibration-resistant connections.

Thermal Considerations

Adequate ventilation remains essential for stable operation. Therefore, installers should maintain clearance above and below the module to support natural convection. Meanwhile, the 65% efficiency rating keeps internal heat generation within manageable limits for standard enclosures.

Installation Guide

Proper installation of the Honeywell 2MLR-AC12 ensures stable power delivery and long module life. The following steps outline the key procedures.

Mechanical Mounting

First, verify the rack position and confirm sufficient clearance for airflow. Next, insert the module into the designated power slot and secure it with the provided fasteners. After that, check that the unit sits flush with adjacent modules.

Wiring Connections

Connect the AC input lines to the designated terminals using 0.75–2 mm² cable. Then, tighten the clamped terminals firmly to prevent loose contacts. Furthermore, route input wiring away from signal cables to minimize electrical noise coupling.

Grounding and Status Check

Connect the functional ground to a low-impedance earth point. Subsequently, power up the system and confirm that the voltage status LED turns on. Finally, verify the RUN contact behavior if the system uses status monitoring.

Packaging List

• 1 × Honeywell 2MLR-AC12 Power Supply Module

• 1 × Installation Reference Sheet

Note: Certificates and warranty documents are not included in the standard packaging.

Shipping

All orders ship via Fedex, UPS, DHL with tracking available.

FAQ

Q1: What output voltage does the 2MLR-AC12 provide?
A: The module delivers a regulated 5 VDC output (±2%) with a maximum current of 5.5 A, yielding 27.5 W at 55°C.

Q2: What is the input voltage range of this power supply?
A: The 2MLR-AC12 accepts 85–132 VAC at 50/60 Hz, with a rated input of 110 VAC.

Q3: Can users replace the internal fuse?
A: No. The built-in fuse is not user-replaceable. Specifically, the AC fuse is rated 250 V/3.15 A (time-lag type, UL approved).

Q4: What is the purpose of the RUN contact?
A: The RUN contact provides a status signal rated 24 VDC, 0.5 A. It allows the control system to monitor power supply health and trigger alarms when necessary.

Q5: What is the shipping weight of the 2MLR-AC12?
A: The net weight is 326 g. Gross shipping weight is approximately 0.85 kg after packaging.