The GE 44A747665-001R03, also cataloged as the 44A747665-001R03 Lithium Battery, operates as a dedicated hardware component for memory backup and clock retention within GE PLC and control system platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 44A747665-001R03 |
| Brand | GE |
| Origin | Japan |
| Weight | 0.05 lbs (0.02 kg) |
| Dimensions | Compact cell assembly with wire lead |
| Operating Temp | -20 to +60 deg C |
| Power Consumption | Non-rechargeable primary battery |
| Chemistry | Lithium Manganese Dioxide ($Li-MnO_2$) |
| Nominal Voltage | 3 VDC |
| Nominal Capacity | 300 mAh |
| Connection Type | Wire leads with polarized keyed connector |
Deterministic Backplane & Power Retention
The battery connects directly to the CPU or memory module power retention circuit to sustain volatile RAM data during primary backplane bus power interruption. Channel circuitry maintains low self-discharge rates, ensuring long-term firmware flash retention and system clock synchronization across high-density I/O platforms. Integrated isolation elements prevent reverse charging currents from entering the battery cell when the main PLC rack supply is energized.
Frequently Asked Questions
Q: Can the 44A747665-001R03 battery be replaced while the PLC CPU module is powered?
A: Yes. Replacing the battery while the rack backplane power supply remains energized ensures RAM contents and system clock settings are continuously supported during the swap.
Q: What indicates that the 3 VDC lithium battery voltage is below the operational threshold?
A: The host CPU controller monitors backup voltage and triggers a diagnostic "BAT" or low-battery system LED when terminal voltage drops below nominal operating levels.
Field Installation Guidelines
- Polarity Verification: Inspect the keyed wiring harness connector to ensure correct pin alignment with the CPU battery header before insertion. Do not force non-matching connections.
- Cell Handling: Avoid short-circuiting the exposed wire lead terminals during installation. Shorting can cause rapid cell discharge and thermal breakdown.
- Disposal and Safety: Never attempt to recharge, incinerate, or disassemble the lithium cell. Dispose of depleted batteries in compliance with local environmental regulations.
- Connector Retention: Ensure the wire lead connector is fully seated and latched onto the PCB pin header to withstand industrial machine vibration.
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