I/O modules

This GE Fanuc power supply module delivers reliable DC power for Series 90-70 PLC backplanes. It converts AC input into stable +5 VDC, +12 VDC, and -12 VDC outputs. Engineers can trust this unit for continuous operation in critical industrial applications. Its compact design fits standard racks and supports high-density I/O configurations. The module includes comprehensive protection features to safeguard connected equipment.

Physical Characteristics and Mounting Design

The module measures 9.0 inches in height and 1.5 inches in width. Its sturdy metal housing weighs approximately 3.5 pounds for durable installation. A dedicated backplane connector supplies power directly to all rack-mounted modules. The unit slides easily into the chassis and locks securely in place. This design simplifies replacement and reduces system downtime during maintenance.

Output Specifications and Load Capacities

The main output provides +5 VDC at 20 A for logic and I/O modules. A secondary +12 VDC output delivers 4 A for analog circuits and communication boards. The -12 VDC output supplies 2 A for specialized interface requirements. This configuration supports a total output power of 120 watts under normal conditions. Each output includes independent overvoltage protection and current limiting circuits. These protective measures maintain stable power delivery across varying load conditions.

Power Input Range and Energy Storage Features

The module accepts a wide AC input range from 85 to 264 VAC. This broad tolerance accommodates global power grids without manual voltage selection. An onboard hold-up capacitor stores sufficient energy for 20 milliseconds after input loss. This energy storage ensures graceful shutdowns and prevents data corruption. The module also filters incoming power to reduce harmonics and electrical noise.

Diagnostic Indicators and Front Panel Controls

A green “POWER OK” LED confirms proper output voltage regulation. Three additional LEDs indicate overvoltage, overcurrent, and overtemperature conditions. A manual reset button allows quick recovery from fault states. The module provides a DC OK relay contact for external monitoring. This contact enables remote alarm notification to central control rooms.

Thermal Management and Environmental Ratings

The unit uses natural convection cooling without any internal fans. This passive design eliminates mechanical failure points and reduces maintenance needs. The module operates efficiently across a temperature range from 0 to 55 degrees Celsius. Its aluminum heat sink dissipates heat effectively during peak loads. The module maintains full output capacity up to 50 degrees Celsius ambient temperature.

Technical Specifications Overview

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