Motorola PCE I HPR431 Power Converter Module

Overview

The HPR431 is part of Motorola's PCE I series of power conversion modules, specifically engineered for integration into SYS431 and SYS443 chassis systems. It converts AC input or higher DC voltage into the multiple regulated DC levels required by VMEbus boards and associated peripherals. The module is designed for high reliability in industrial automation, telecommunications, and military applications where power integrity is critical.

Key Features

• Output Voltages: +5 V DC at 40 A, +12 V DC at 8 A, -12 V DC at 4 A, +3.3 V DC at 20 A (configurable).

• Input Range: 90-264 V AC (47-63 Hz) or 110-340 V DC (wide range).

• Efficiency: >85% at full load, reducing heat dissipation.

• Protection: Overvoltage, overcurrent, short-circuit, and overtemperature protection with auto-recovery.

• Monitoring: Power good signal, output voltage sense lines, and front panel LED indicators.

• Cooling: Forced air cooling via integrated fan or chassis airflow; thermal shutdown protection.

• Form Factor: 6U VMEbus compatible, single-slot width.

• Redundancy: Supports parallel operation for N+1 redundant configurations.

Technical Specifications

• Output Ripple: < 50 mV peak-to-peak (20 MHz bandwidth).

• Line Regulation: ±0.2% for all outputs.

• Load Regulation: ±0.5% (10% to 100% load).

• Hold-up Time: > 20 ms at full load.

• Operating Temperature: 0°C to +50°C (derating above 40°C).

• Storage Temperature: -40°C to +85°C.

• Dimensions: 233 x 160 x 40 mm (6U x 160mm depth).

• Connectors: VMEbus P0/P1/P2 backplane connectors and auxiliary I/O.

Functional Description

The HPR431 employs high-frequency switching topology to achieve high power density. It incorporates a power factor correction (PFC) stage for compliance with international harmonic standards. The module communicates with the system via the VMEbus backplane, providing status signals and enabling remote power cycling. Integrated monitoring circuits report output voltage levels and fault conditions. The module also includes a soft-start circuit to limit inrush current during power-up.

Applications

• VMEbus-based industrial control systems.

• Telecommunications switching equipment.

• Military and aerospace embedded systems.

• Medical imaging and diagnostic platforms.

• Test and measurement instrumentation.

Installation and Maintenance

The HPR431 plugs into a dedicated power slot within the SYS431 or SYS443 chassis. It is keyed to prevent incorrect insertion. The module is hot-swappable in redundant configurations, allowing replacement without system shutdown. Routine maintenance involves checking fan operation and cleaning air filters. The module includes a status LED for quick fault identification.

Certifications

• CE, UL, and CSA certified.

• Compliant with EN 61000-3-2 (harmonics) and EN 55022 Class B (EMC).

• Designed to meet MIL-STD-461 for EMI (select variants).

Note: This document provides technical information; refer to the Motorola PCE I HPR431 product manual for complete specifications and installation guidelines.