The Schneider Electric 990XCP98000 is a dedicated lithium-thionyl chloride (Li-SOCl2) backup battery designed for the Modicon Quantum automation series. This component provides the necessary 3 V DC power to sustain the CPU's volatile RAM and real-time clock (RTC) during main power outages. By ensuring the integrity of stored ladder logic, configuration parameters, and event logs, this battery prevents data loss and reduces the need for system re-initialization after power cycles.
Features
High-energy density lithium chemistry for long-term reliability.
Low self-discharge rate supporting a service life of up to 10 years.
Integrated wire lead connector for secure, rapid installation within the CPU module.
Designed to support real-time clock tracking and time-stamped diagnostic data.
Compatible with hot-swappable replacement protocols when managed via the CPU's BAT alarm indicator.
Applications
This backup battery is essential for industrial control environments where memory retention during power failure is critical. Common applications include petrochemical processing, power generation, infrastructure automation, and water treatment systems where PLC state preservation is required for operational continuity.
Technical Specifications
Model
990XCP98000
Brand
Schneider Electric
Platform
Modicon Quantum
Chemistry
Lithium Thionyl Chloride
Voltage
3 V DC
Capacity
1.2 Ah (1200 mAh)
Operating Temperature
-20 to 60 deg C
Storage Temperature
-40 to 70 deg C
Certifications
CE, UL, CSA
Installation Guidelines
Ensure the CPU is powered or the system is in a controlled state before battery replacement if the application permits hot-swapping.
Verify the connector polarity and seating during installation to prevent intermittent power delivery.
Store in a cool, dry environment away from direct sunlight to maintain the shelf life of the chemical cell.
Dispose of used lithium batteries according to local industrial hazardous waste regulations.
Monitor the front-panel BAT alarm on the CPU; replace the unit immediately when the low-voltage threshold is triggered.
FAQ
Does this battery require special handling during installation?
Yes, ensure the connector is firmly seated in the CPU module housing. Avoid short-circuiting the leads, as this can damage the cell and reduce its effective service life.
How do I know when to replace the 990XCP98000?
The Modicon Quantum CPU features a dedicated BAT alarm indicator on the front module face. This indicator illuminates when the battery voltage drops below the operational threshold, signaling that a replacement is required.
