GE IC693PWR321Z: Power Supply for Series 90-30

This power supply converts incoming AC voltage to stable DC levels. It provides reliable operating power to the Series 90-30 backplane. The GE IC693PWR321Z supplies all modules in a single I/O rack. You can install this unit in the leftmost slot of the chassis.

Technical Parameters Overview

AC Input and Rectification Stage

Furthermore, the GE IC693PWR321Z accepts a wide 85-264 VAC input range. This range covers worldwide mains voltages from 100 V to 240 V. A bridge rectifier converts incoming AC to pulsating DC. An input filter reduces conducted electromagnetic interference. Therefore, the module meets international EMC standards for industrial equipment.

DC Output Rails and Regulation

This power supply produces three distinct DC output voltages. A 5 VDC rail delivers up to 3.0 amperes for logic circuits. A 24 VDC rail provides 0.5 ampere for output relay coils. A -12 VDC rail supplies 0.1 ampere for analog circuitry. Each output includes overload protection with automatic recovery. Consequently, the GE IC693PWR321Z survives momentary short circuits without permanent damage.

Energy Storage and Hold-up Performance

For energy storage, three capacitors hold 2,200 µF total capacitance. Two 1,000 µF capacitors filter the main 5 VDC output. One 200 µF capacitor serves the 24 VDC auxiliary rail. This arrangement provides 20 milliseconds of hold-up time. During a power dip, the GE IC693PWR321Z continues delivering full output. Your PLC program will not experience a shutdown or data loss.

Component Layout and Thermal Design

Moreover, 105 discrete components populate a single glass-epoxy PCB. A large aluminum heat sink covers the switching transistors. The power supply uses passive convection cooling without a fan. Ventilation slots on the top and bottom allow airflow. Warm air rises naturally through these openings. The GE IC693PWR321Z operates reliably in 0°C to 60°C ambient temperatures.

Backplane Interface and Power Distribution

The rear connector transfers power directly to the rack backplane. This connection distributes the three DC voltages to all I/O slots. An LED indicator on the front panel shows proper output status. The GE IC693PWR321Z also provides a reset signal to the CPU module. This signal holds the processor in reset until voltages stabilize. Therefore, your system will not execute code during power-up transients.

Installation and Replacement Guidelines

You can insert this power supply into any leftmost rack slot. A metal latch secures the unit firmly to the chassis. Always disconnect the main AC supply before removing the module. The GE IC693PWR321Z has no user-serviceable parts inside. Replace the entire unit if the output LED fails to illuminate.