FX3U-32BL Memory Backup Battery for FX3G/FX3U/FX5U PLC | Mitsubishi Electric

The Original New Mitsubishi Electric FX3U-32BL is a lithium manganese dioxide memory backup battery designed for the MELSEC-F series programmable logic controllers. It provides reliable program memory backup, data retention, sampling trace storage, and clock time retention for FX3G, FX3GE, FX3GC, FX3U, FX3UC, FX5U, and FX5UC main units. The battery is not included with the CPU module at factory shipment and must be ordered separately when backup functionality is required. Battery voltage can be monitored via PLC data register D8005 for preventive maintenance.

Core Engineering Highlights:
Lithium manganese dioxide (Li-MnO2) battery | 3 V nominal voltage | 5-year standard life at 25°C | Program memory backup in built-in RAM | Data retention on battery-backed devices | Sampling trace results storage | Clock time storage | Battery voltage monitoring via D8005

Key Features:

• Original New Mitsubishi Electric FX3U-32BL battery

• Lithium manganese dioxide chemistry for stable long-term performance

• Nominal voltage: 3 V DC

• Standard life: approximately 5 years at 25°C ambient temperature

• Supports program memory backup through built-in RAM

• Enables data retention on battery-backed devices

• Stores sampling trace results

• Maintains clock time during power interruption

• Battery voltage can be monitored via PLC data register D8005

• Connector-type termination for secure installation

• Compact and lightweight design

Applications:

• Memory backup for FX3G, FX3GE, FX3GC, FX3U, FX3UC, FX5U, and FX5UC PLC main units

• Program and data retention during power interruptions

• Clock and calendar data maintenance

• Sampling trace result storage

• Latch device/label capacity extension

• Preventive maintenance for critical PLC systems

Technical Specifications:

System Compatibility:

• Compatible with Mitsubishi Electric MELSEC-F series programmable controllers. Module compatibility should be verified before installation.

• Technical compatibility with FX3G main units, FX3GE main units, FX3GC main units, FX3U main units, and FX3UC main units

• Also compatible with FX5U and FX5UC main units

• For FX3G main units, after installation, set "Battery Mode: Use the battery" in the GX Developer parameter screen

Related Products:

• FX2NC-32BL – Battery for FX2NC series and FX2N-20GM modules

• F2-40BL – Battery for FX2N series (auxiliary item)

• FX3U-32BL – Battery for FX3G/FX3U/FX3GC/FX3UC/FX5U/FX5UC (current model)

• FX3U-32BL – Replacement battery (equivalent to FX3U32BL)

PLC ERA is an independent industrial automation distributor supplying genuine Original New products through established global supply channels. All products are factory sealed when applicable and undergo quality inspection prior to shipment. Mitsubishi Electric and MELSEC are trademarks of Mitsubishi Electric Corporation.