GE Fanuc IC694PWR321B RX3i串行背板扩展电源

Brand GE

Model GE IC694PWR321B RX3i

Product Overview

The GE IC694PWR321B is a standard expansion power supply module engineered for the GE Fanuc PACSystems RX3i control platform, specifically designed to energize remote or local expansion bases rather than the main CPU rack. As a critical component within the RX3i power architecture, the GE IC694PWR321B converts nominal 120/240 VAC or 125 VDC input power into regulated DC rails, delivering stable voltage to the backplane and all associated I/O modules on the expansion rack. This module occupies the leftmost slot of the serial expansion backplane and operates seamlessly with every RX3i CPU model, enabling system integrators to scale I/O capacity across distributed control architectures without duplicating processing hardware.

The GE IC694PWR321B distinguishes itself through its wide input voltage range, accepting 85 to 264 VAC or 100 to 300 VDC, which accommodates standard plant mains, UPS outputs, and DC station batteries without requiring jumper reconfiguration. Its auto-ranging capability simplifies commissioning and reduces wiring errors in field installations. The module provides three distinct output rails: a 5 VDC logic rail for backplane communication, a 24 VDC relay output for driving output relay circuits, and an isolated 24 VDC output for powering field devices connected to input modules. With a total output capacity of 30 watts, the GE IC694PWR321B supplies sufficient power for typical combinations of RX3i I/O modules, bus controllers, and specialty cards.

In distributed control panels where RX3i racks reside in remote motor control centers or field junction rooms, the GE IC694PWR321B serves as the reliable power backbone that maintains logic-level voltage stability across extended backplane configurations. Its integrated overcurrent protection and electronic shutdown mechanisms safeguard connected modules from overload or short-circuit conditions, while the 20 ms minimum ride-through capability ensures uninterrupted operation during brief power disturbances.

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Description

Technical Specifications

Parameter Name	Parameter Value
Product Model	GE IC694PWR321B
Manufacturer	GE Fanuc / Emerson
Product Type	RX3i Expansion Power Supply Module
Nominal Input Voltage	120/240 VAC or 125 VDC
Input Voltage Range	85 to 264 VAC / 100 to 300 VDC
Input Power (Max Load)	90 VA (AC input) / 50 W (DC input)
Total Output Power	30 Watts maximum
Output Voltages	5 VDC (5.0-5.2V), 24 VDC Relay (24-28V), 24 VDC Isolated (21.5-28V)
5 VDC Output Current	6 A maximum
24 VDC Relay Output Current	1 A maximum
24 VDC Isolated Output Current	0.25 A maximum
Isolation (Input to Backplane)	1500 VAC for 1 minute
Ride-Through Time	20 ms minimum
Operating Temperature	0°C to +60°C
Dimensions	Approximately 137 mm × 72 mm × 133 mm
Weight	0.45 kg
Mounting Position	Leftmost slot of RX3i serial expansion backplane
Overcurrent Protection	5 VDC output electronically limited to 3.5 A
Input Fuse Rating	2 A

Main Features and Advantages

The GE IC694PWR321B delivers a combination of capabilities specifically tailored for distributed RX3i control architectures where reliability and flexibility are paramount. Its most defining characteristic is the wide-range auto-ranging input, which eliminates the need for manual jumper settings when switching between AC mains and DC battery sources. This design simplification reduces commissioning time and removes a common source of configuration error in field installations, allowing the GE IC694PWR321B to adapt to diverse power infrastructures without hardware modification.

Robust protection mechanisms further distinguish the GE IC694PWR321B. The 5 VDC output is electronically limited to 3.5 A, and if an overload or short circuit occurs, the module senses the condition internally and initiates a controlled shutdown with automatic restart attempts until the fault clears. This behavior prevents catastrophic failure and protects downstream I/O modules from damage. A 2 A input fuse provides backup protection against internal supply faults, while the module’s continuous restart capability maintains system availability whenever transient conditions resolve.

Electrical isolation represents another critical advantage of the GE IC694PWR321B. With 1500 VAC isolation between primary input and backplane, the module prevents electrical noise and transient voltages from corrupting high-speed backplane communications. This isolation is particularly valuable in industrial environments where motor drives, relays, and other noise-generating equipment share the same electrical infrastructure.

The ride-through capability of the GE IC694PWR321B ensures that brief power interruptions—common during generator transfers or upstream breaker operations—do not cause controller resets. With a minimum 20 ms hold-up time at full load, the module maintains valid output voltages across single-cycle voltage sags, allowing the CPU to continue executing logic without interruption.

Compatibility across the entire RX3i CPU range makes the a versatile choice for both new installations and system expansions. Its snap-in mounting design mirrors I/O module installation, and LED indicators for PWR, OK, and RUN provide immediate visual confirmation of module health and system status.