ABB 500PSM03 1MRB150038R1 | Auxiliary DC/DC Power Supply Module

Description

Technical Specifications

ABB documentation identifies the 500PSM03 as a 100 W power supply module, while the REB500 manual specifies the 36–312 VDC input range and individual output ratings.

Product Introduction

The ABB 500PSM03 1MRB150038R1 is a 100 W auxiliary power supply module used in ABB protection and control equipment. In the REB500/REB500sys architecture, the ABB 500PSM03 functions as the power supply unit for the central unit, providing the regulated internal DC rails required by processor, communication, and I/O electronics. ABB documentation describes it specifically as an isolated DC/DC converter.

The ABB 1MRB150038R1 500PSM03 accepts a wide 36–312 VDC input without requiring manual input-range switching. Its four documented output rails are +3.3 VDC at 8 A, +5 VDC at 16 A, +12 VDC at 3 A, and −12 VDC at 0.5 A, with a total rated output power of 100 W. This arrangement makes the module suitable for supplying multiple internal electronic circuits from a single station DC source.

500PSM03

The ABB 500PSM03 894-030375D 136-011100H markings are useful when identifying an installed legacy module. The 894-030375D and 136-011100H markings appear alongside the 1MRB150038R1 designation in ABB 500-series references.

The module includes continuous monitoring of output-voltage tolerances. The REB500 documentation also specifies a 10 A / 250 V slow-blow input fuse and describes LED indications associated with supply status and redundant-supply faults.

Main Features & Field Considerations

Wide DC input range
The 36–312 VDC input specification accommodates common substation and industrial DC supply systems without selecting separate input ranges.

Multiple regulated rails
The module provides four separate DC output levels. This is important when troubleshooting because a failure of one output rail can affect only certain electronics rather than causing an immediately obvious total power failure.

Electrical isolation
The power stage is specified as an isolated DC/DC converter, providing electrical separation between input and output circuits.

Redundant-system capability
The REB500 documentation describes the 500PSM03 within central-unit power arrangements where redundant supply operation can be implemented. A yellow indication can identify failure of one unit in a redundant pair, while a red indication identifies a rack-level module failure.

Important replacement checks

Before replacing a 500PSM03 1MRB150038R1, verify:

• Complete ordering number
• 1MRB150038R1 / 1MRB150038R0001 identification
• PCB marking 894-030375D
• Additional marking 136-011100H
• Input DC voltage
• Output rail measurements
• Rack/backplane compatibility
• Redundant power-supply arrangement
• Existing fuse and LED status

One important correction to watch for in procurement: some third-party listings incorrectly describe this part as an AC-input/24 VDC-output supply. The ABB REB500 documentation instead specifies 36–312 VDC input with multiple low-voltage DC outputs. The ABB documentation should be used for engineering decisions.

Typical Applications

ABB / REB500sys

• Busbar protection systems
• Central-unit auxiliary power
• Protection processor supply
• Communication and I/O electronics

Substation Protection & Control

• High-voltage substation control equipment
• Numerical protection systems
• Redundant protection architectures

Procurement Note

For the ABB 500PSM03 1MRB150038R1 894-030375D 136-011100H, the 1MRB150038R1 / 1MRB150038R0001 identification should be treated as the primary ordering reference, with 894-030375D and 136-011100H used as additional physical identification. ABB’s own product documentation confirms the 100 W rating, while the manual provides the more useful electrical details for replacement verification.