GE Fanuc IC698ACC720 Replacement Battery Assembly

Description

The IC698ACC720 is a specialized Replacement Battery Assembly designed specifically for the GE Fanuc (Emerson) PACSystems RX7i PLC series. Unlike smaller coin cells used in lower-end PLCs, this is a high-capacity lithium battery pack housed in a protective casing with a dedicated wire lead and connector. It is essential for maintaining the CPU’s user program, hardware configuration, and symbolic variables in CMOS RAM during a power outage.

Specifications

• Part Number: IC698ACC720
  
• Compatibility: PACSystems RX7i CPUs 
• Battery Type: Lithium Thionyl Chloride .
• Output Voltage: 3.6 VDC.
• Capacity: High-capacity cell designed for multi-year shelf life.
• Connector: Two-wire twisted lead with a keyed polarized connector.
• Housing: Plastic clip-in holder for secure mounting within the CPU frame.

Features

• Extended Memory Retention: Engineered to provide long-term backup (typically 1–2 years depending on power-off cycles) for the large memory buffers of RX7i controllers.
• Hot-Swap Safety: The RX7i CPU includes a large onboard capacitor that holds the memory for approximately 30 minutes, allowing you to replace the IC698ACC720 while the PLC is powered down without losing the program.
• Polarized Connection: The keyed connector prevents accidental reverse-polarity installation, which could damage the CPU's internal charging/sensing circuitry.
• System Diagnostics: When the battery voltage drops below a critical threshold (typically 3.1V), the CPU triggers a "Low Battery" fault in the PLC Fault Table and illuminates the BATT LED on the front panel.