Allen-Bradley PM3328B Power Supply Modules – 80026-524-01-R PM3328B-6-1-3-E

Technical Dossier

Product Details And Specifications

Allen-Bradley PM3328B Series Technical Notes

The Allen-Bradley PM3328B series is a line of industrial power supply modules developed by Rockwell Automation under the Allen-Bradley brand. These units are deployed across heavy industrial environments including petrochemical refineries, nuclear power auxiliary systems, offshore platforms, and continuous-process manufacturing facilities. The PM3328B series provides regulated DC output power to backplane-mounted I/O and controller modules within legacy Allen-Bradley programmable controller systems. Their wide installation base in critical infrastructure makes long-term spare parts availability a primary operational concern for plant engineers and maintenance teams globally.

The Evolution of PM3328B Architecture

The PM3328B designation follows Allen-Bradley's modular power supply numbering convention used across the PLC-3, PLC-5, and associated I/O chassis platforms from the late 1980s through the 2000s. Early variants in this lineage used linear regulation topologies with discrete component designs, offering high noise immunity at the cost of thermal efficiency. Subsequent revisions introduced switching regulator architectures, reducing heat dissipation and improving efficiency ratings above 80%. The suffix structure in the part number (e.g., -6-1-3-E) encodes output voltage configuration, current rating, revision level, and regional compliance variant. Compatibility between suffix variants is not guaranteed; backplane connector pinouts and output voltage rails must be verified before substitution. As Rockwell Automation transitioned its control platform strategy toward ControlLogix and CompactLogix architectures in the 2000s, the PM3328B series entered end-of-life status. Rockwell ceased active production of most variants, making the secondary market and specialist distributors the primary sourcing channel for ongoing maintenance.

PM3328B Full Catalog & Functionalities (SKU List)

The following SKUs represent verified models within the Allen-Bradley PM3328B power supply series. Each entry includes a concise functional description for maintenance reference.

80026-524-01-R PM3328B-6-1-3-E: Regulated DC power supply, 6A output, revision E, chassis mount.
PM3328B-4-1-2-D: 4A output DC supply, revision D, for mid-density I/O chassis.
PM3328B-8-1-3-E: High-current 8A supply for large-frame PLC backplanes.
PM3328B-6-1-2-D: 6A output, revision D, predecessor to the -3-E variant.
PM3328B-4-2-3-E: Dual-output 4A supply, revision E, for redundant power configurations.
PM3328B-10-1-3-E: 10A heavy-duty supply for high-density analog I/O racks.
PM3328B-6-1-1-C: Early revision C, 6A output, linear regulation topology.
PM3328B-4-1-1-C: 4A linear supply, revision C, original production variant.
PM3328B-8-2-3-E: Dual-output 8A supply, revision E, for redundant backplane power.
PM3328B-6-2-2-D: Dual-output 6A, revision D, switching regulator design.
PM3328B-12-1-3-E: 12A output, high-capacity supply for expanded I/O chassis.
PM3328B-4-1-3-E: Standard 4A supply, revision E, current production-equivalent spec.
PM3328B-8-1-2-D: 8A output, revision D, switching topology, pre-E revision.
PM3328B-6-1-4-F: Revision F update, 6A output, enhanced thermal protection circuit.
PM3328B-10-2-3-E: Dual-output 10A, revision E, for large redundant power architectures.
PM3328B-4-2-2-D: Dual-output 4A, revision D, compact chassis application.
PM3328B-6-1-5-G: Latest known revision G, 6A output, updated EMC compliance.

Quality Control for the PM3328B Range

Power supply modules in the PM3328B series present specific test challenges due to their backplane interface design and multi-rail output configurations. DriveKNMS applies the following test protocol to all PM3328B units prior to shipment. Each unit undergoes a 24-hour burn-in test under rated load conditions to screen for early-life component failures. Output voltage rails are measured at no-load, 50% load, and full rated load to verify regulation accuracy within ±2% of nominal. Ripple and noise are measured using a 20 MHz bandwidth oscilloscope to confirm compliance with original Allen-Bradley specifications. Backplane connector pins are inspected under magnification for corrosion, deformation, and solder joint integrity. Units with switching regulator topologies are tested for soft-start behavior and overcurrent protection response. Any unit that fails to meet original specification thresholds is either repaired to specification or removed from saleable inventory. Test data is retained for a minimum of 24 months and is available to customers upon request.