The GE IC695ACC402 is a specialized Energy Pack module designed for the PACSystems RX3i controller platform. While often categorized alongside analog modules due to its placement in the RX3i rack, its primary function is to provide backup power to the IC695CPU315 and other specific CPUs during a power failure. This ensures that the CPU can safely write its RAM data to non-volatile flash memory, preventing data loss without the need for traditional lithium batteries.
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Technical Description and Parameters
The IC695ACC402 utilizes ultra-capacitor technology to provide a maintenance-free energy storage solution. It is designed to be “hot-swappable” and communicates its charge status directly to the RX3i CPU.
- Module Type: Energy Pack (Capacitor-based Backup)
- System Compatibility: PACSystems RX3i
- Primary Function: Provides backup power for “Retentive Memory” save-to-flash operations
- Charging Time: Typically less than 2 minutes to reach full charge
- Service Life: Approximately 10 years (temperature dependent)
- Status Monitoring: Real-time diagnostics for capacitance health and voltage levels
- Interconnect: Requires a specific dedicated cable to connect to the RX3i CPU
Product Datasheet Specifications
- Dimensions: 130 mm x 35 mm x 110 mm (Single-slot RX3i width)
- Weight: 0.42 kg (0.93 lbs)
- Country of Origin: USA
- Mounting: RX3i Universal Backplane (PCI bus)
- Operating Temperature: 0°C to 60°C (32°F to 140°F)
- Storage Temperature: -40°C to +85°C
Application Fields
The IC695ACC402 is essential in critical automation environments where battery maintenance is difficult or data loss is unacceptable:
- Remote Water/Wastewater Sites: Eliminates the need for annual site visits to replace PLC batteries.
- Continuous Process Plants: Ensures that recipes and machine states are preserved during sudden plant-wide power outages.
- Infrastructure & Transportation: Used in signaling and control systems where high reliability and low maintenance are required.
- Energy Management: Safeguards historical data and logs in distributed power monitoring systems.
Product Instructions for Use
- Installation: Insert the module into any available slot on the RX3i Universal Backplane. Use the plastic tabs to ensure it is locked into place.
- Connection: Connect the IC693CBLxxx (standard energy pack cable) from the port on the front of the ACC402 to the matching port on the RX3i CPU.
- Initial Charge: Upon first power-up, the module will take a few moments to charge. The CPU status bits will indicate when the Energy Pack is “Ready.”
- Maintenance: Periodically check the “Energy Pack Health” bit in your GE Machine Edition software logic to monitor the aging of the capacitors.
Q&A: Frequently Asked Questions
Q: Does the IC695ACC402 replace the need for a battery? A: Yes, for compatible RX3i CPUs, this module replaces the standard lithium battery by providing enough power to move volatile data to permanent storage upon power loss.
Q: Can I use one IC695ACC402 to back up multiple CPUs in the same rack? A: No, each Energy Pack is dedicated to a single CPU via a direct physical cable connection.
Q: What happens if the Energy Pack is disconnected while the system is running? A: The CPU will log a “Loss of Device” fault and signal that the memory is no longer protected. The PLC will continue to run, but data will not be saved if power is lost.
Related Product News
Emerson (which now owns the GE Fanuc / PACSystems line) has continued to promote the Energy Pack technology as a “Green” alternative to lithium batteries. Recent updates to the PACSystems firmware have improved the precision of the capacitor-aging algorithms, allowing plant managers to more accurately predict when an IC695ACC402 should be replaced. As of 2026, the RX3i platform remains a flagship for Emerson’s industrial edge strategy, with the ACC402 serving as a critical component for ensuring high uptime in decentralized “Smart City” applications and automated manufacturing hubs.
