PLCs, Power Supplies & Others

The Schneider 990XCP98000 provides reliable backup power for memory retention in Modicon Quantum systems. This 3V lithium battery delivers 1800mAh capacity for extended program and data preservation during power outages.

Key Technical Specifications

Battery Chemistry and Discharge Characteristics

The Schneider 990XCP98000 utilizes lithium chemistry to deliver stable 3V output throughout its discharge cycle. This flat discharge curve ensures consistent memory retention voltage until the battery approaches end-of-life.

Unlike standard alkaline cells, this lithium battery maintains reliable performance across the full 0°C to +60°C operating range. Facilities in cold climates or unheated equipment rooms benefit from this extended temperature tolerance.

Capacity and Service Life

With 1800mAh rated capacity, the 990XCP98000 provides approximately five years of continuous backup protection under normal operating conditions. The module draws minimal current during steady-state operation, typically less than 10 µA.

This long service life significantly reduces maintenance intervals for large facilities. Plant engineers can schedule battery replacements during planned annual shutdowns rather than emergency outages.

Mechanical Design and Form Factor

Weighing just 0.02 kg, this compact battery module measures 48 mm x 25 mm x 15 mm. The small footprint allows installation in densely packed Quantum racks without obstructing adjacent modules or wiring.

The integrated 2-pin male header includes a positive locking latch. This mechanical retention prevents vibration-induced disconnection, a critical reliability feature for industrial applications.

System Compatibility and Integration

Schneider engineered the 990XCP98000 specifically for the Modicon Quantum automation platform. The battery connects directly to compatible Quantum CPUs including 140CPU31110, 140CPU43412, and 140CPU65150 models.

Memory extension modules such as 140XCP90000 and 140XCP91000 also accept this battery. The universal connector ensures correct polarity and secure attachment across the entire Quantum product line.

Installation and Replacement Procedure

Installing the 990XCP98000 requires no special tools or technical training. Users simply align the connector keyway and press firmly until the locking latch engages with an audible click.

The module includes polarity protection to prevent damage from incorrect installation. This design consideration protects expensive CPU hardware during field replacement by maintenance personnel.

Energy Storage and Data Retention

This 3V lithium battery maintains program memory, register values, and system configuration during power loss. The 1800mAh capacity supports continuous backup for thousands of hours without main power.

When main power returns, the battery immediately ceases discharge and enters standby mode. This automatic power switching maximizes service life while ensuring instantaneous system restart.

Low Self-Discharge Rate

The 990XCP98000 exhibits extremely low self-discharge, retaining over 90% of initial capacity after five years of storage. This characteristic allows facilities to maintain spare batteries on-site without frequent replacement cycling.

Manufacturing date codes printed on each battery enable simple inventory rotation. Installers should always select the freshest available unit for critical system backup applications.

Status Monitoring and End-of-Life Indication

Many Modicon Quantum CPUs include onboard battery voltage monitoring circuitry. The system generates an alert when the 990XCP98000 approaches end-of-life, typically at approximately 2.8 VDC under load.

This predictive warning allows planned replacement before actual memory loss occurs. Plant personnel receive ample notification to schedule maintenance without disrupting production operations.

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