1MRS050644
1MRS050644
1MRS050644

ABB 1MRS050644 RTD1 Analog Input Module

Original price was: $7,985.00.Current price is: $3,390.00.

  • Model: 1MRS050644
  • Brand: ABB
  • Series: REF/REM/RET 54x Protection Relay Platform
  • Core Function: RTD temperature signal acquisition
  • Product Type: RTD Analog Input Module
  • Key Specs: RTD Temperature Inputs | Relay Expansion Module | High-Accuracy Analog Signal Processing
  • Condition: New Original / New Surplus
  • Inventory Status: Recommended as a strategic spare for ABB REF54/REM54/RET54 protection systems to minimize maintenance downtime and long procurement lead times.
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Description

Key Technical Specifications

Parameter Value
Manufacturer ABB
Model 1MRS050644
Module Name RTD1 Analog Input Module
Product Type Analog Input Expansion Module
Input Type RTD (Resistance Temperature Detector)
Primary Function Temperature measurement and monitoring
Signal Processing High-accuracy analog acquisition
Installation Plug-in relay expansion module
Compatible Systems ABB REF541, REF543, REF545, REM54, RET54 Series
Typical Applications Transformer, Motor, Generator Temperature Monitoring
Mounting Internal relay module
Condition New Original / New Surplus

The module is identified by ABB as the RTD1 analog input module used within the REF54/REM54/RET54 protection relay family.

 

Product Introduction & Supply Chain Strategy

The ABB 1MRS050644 RTD1 is an analog input expansion module designed to acquire temperature signals from Resistance Temperature Detectors (RTDs). Installed inside ABB REF54, REM54, and RET54 protection relays, it enables continuous temperature monitoring of transformers, generators, motors, and other critical electrical assets.

Maintaining New Original / New Surplus inventory helps utilities and industrial facilities extend the service life of installed ABB protection systems. Since the REF54 platform is a mature product family, keeping spare RTD modules on-site minimizes maintenance delays, reduces emergency procurement costs, and improves Total Cost of Ownership (TCO).

1MRS050644
1MRS050644
1MRS050644
1MRS050644

 

Installation & Configuration Guide

 

Stage 1 – Pre-Installation (Prep & Safety)

  1. Apply Lock-Out/Tag-Out procedures.
  2. Verify the module part number 1MRS050644.
  3. Wear a grounded ESD wrist strap.
  4. Back up relay settings and configuration.
  5. Record:
    • Relay firmware version
    • RTD channel assignments
    • Alarm thresholds
    • Wiring configuration
  6. Photograph all wiring before removal.

 

Stage 2 – Removal

  1. Isolate the relay auxiliary power supply.
  2. Remove the relay from service if required.
  3. Disconnect RTD field wiring.
  4. Carefully remove the existing RTD1 module.
  5. Inspect connectors for contamination or damage.
  6. Verify the replacement module matches the original hardware revision.

 

Stage 3 – Installation (Clone & Seat)

  1. Insert the replacement RTD1 module into the designated slot.
  2. Ensure the module is fully seated.
  3. Reconnect RTD wiring according to documentation.
  4. Restore relay configuration if necessary.
  5. Verify terminal integrity.
  6. Reassemble the relay enclosure.

 

Stage 4 – Power-On & Testing

  1. Restore auxiliary power.
  2. Confirm successful relay self-diagnostics.
  3. Verify RTD temperature readings.
  4. Check alarm and trip thresholds.
  5. Confirm communication with the supervisory system.
  6. Perform functional testing before returning the equipment to service.

 

Firmware/Software Versions & Upgrade Notes

  • The 1MRS050644 is a hardware expansion module and does not contain user-upgradable application firmware.
  • Verify compatibility with the installed REF54/REM54/RET54 relay firmware before replacement.
  • Back up relay settings before servicing.
  • Avoid changing relay firmware during module replacement unless required by the maintenance plan.
  • After installation, verify all temperature measurement channels and protection functions operate correctly.

 

Frequently Asked Questions (FAQ)

1. Is this a genuine ABB product?

Yes. This module is supplied as New Original / New Surplus. It is not refurbished, repaired, or removed from an operating protection system.

2. Why is New Surplus priced higher than refurbished modules?

New Surplus modules provide unused OEM manufacturing quality and full expected component life. Refurbished modules may have unknown operating history and aged electronic components.

3. Which ABB systems use the 1MRS050644?

The 1MRS050644 RTD1 module is used with ABB REF541, REF543, REF545, REM54, and RET54 protection relay platforms to provide RTD temperature input capability.

4. Can the module be replaced while the relay is energized?

No. Disconnect auxiliary power and follow all electrical safety procedures before replacing the module.

5. Will replacing the module affect protection settings?

The RTD module itself does not store relay settings. However, verify RTD channel configuration and alarm thresholds after installation.

6. What quality inspections are completed before shipment?

Each New Original / New Surplus module typically undergoes:

  • OEM part number verification
  • Serial number inspection
  • PCB visual inspection
  • Connector integrity inspection
  • Functional verification where applicable
  • ESD-safe packaging

7. What warranty is typically provided?

A 12-month warranty is commonly offered for New Original / New Surplus ABB protection relay modules, providing dependable support for power system maintenance and lifecycle management.

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