Beckhoff Battery Pack 24 V 1.2 Ah for UPS Power Supply DIN-Rail Mount - C9900-U332-0010
The Beckhoff C9900-U332-0010 is an external 24 V battery pack designed for use with Industrial PCs featuring an integrated UPS power supply. With a rated capacity of 1.2 Ah, it provides backup power to ensure controlled system shutdowns and data protection during mains failures, supporting DIN-rail mounting in both vertical and horizontal orientations.
Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Beckhoff |
| Category |
Industrial Automation |
| Part Number |
C9900-U332-0010 |
| Subcategory |
Battery Pack |
| Function |
External UPS energy storage unit for 24 V power supplies |
| Compatible Systems |
Industrial PCs with integrated UPS (e.g., C9900-U209, ATPCS with Intel® Celeron ULV 827E or Intel® Atom®) |
| Nominal Voltage |
24 V DC |
| Nominal Capacity |
1.2 Ah (20 h discharge) |
| Internal Structure |
Two 12 V batteries connected in series |
| Fuse |
9 A PTC element (resettable protection) |
| Mounting Type |
DIN-rail TS35x15 (2.3) |
| Mounting Orientation |
Vertical or horizontal |
| Housing Material |
Metal |
| Power Supply Connection |
Via 24 V UPS interface |
| Operating Temperature |
0°C to +50°C |
| Storage Temperature |
-20°C to +60°C |
| Protection Class |
IP20 |
| Maintenance |
Maintenance-free design |
| Application |
Backup energy storage for safe shutdown of IPCs |
| Dimensions (W × H × D) |
68.7 × 106.6 × 143.8 mm |
| Weight |
2.1 kg |
What our Experts Think
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High-speed motion feedback interface: The Beckhoff EL5101 is a 1-channel EtherCAT incremental encoder terminal designed for precise position and speed measurement in industrial motion systems.
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Supports multiple encoder types: Works with both differential RS422 encoders and TTL single-ended signals, making it highly versatile for automation retrofits and new builds.
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Very high input frequency: Capable of processing signals up to 1 MHz (4 million increments/s with quadrature decoding) for high-speed motion applications.
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Precision measurement capability: Enables period and frequency measurement with ~100 ns resolution, supporting accurate dynamic axis control.
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Advanced motion features: Includes microincrement interpolation, timestamping of edges, and distributed clock synchronization for deterministic EtherCAT systems.
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Built-in control functions: Supports latch, gate, and counter functions, allowing events like zero pulses and position capture.
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Industrial robustness: Designed for 24/7 operation with electrical isolation and strong EMC resistance for harsh factory environments.
Q&A
Q: What is the Beckhoff C9900-U332-0010 battery pack used for?
A: The C9900-U332-0010 is a 24 V DIN-rail mounted battery pack used as an energy storage unit for industrial PCs with integrated UPS functionality.
Q: What is its main purpose in an automation system?
A: It provides backup power during mains failure, allowing the industrial PC to save data safely and shut down properly without corruption or data loss.
Q: What type of systems is it designed for?
A: It is designed for Beckhoff Industrial PCs (especially Intel Atom–based systems) that include an integrated UPS power supply concept.
Q: What are its key technical features?
A: It offers 24 V DC nominal voltage, 1.2 Ah capacity, maintenance-free VRLA AGM battery technology, and a compact DIN-rail metal housing for control cabinet installation.
Q: How is it installed?
A: The unit is mounted externally on a DIN rail (TS35), typically inside a control cabinet, and connected to the IPC’s UPS power system.
Q: What happens during a power failure?
A: The battery pack supplies short-term energy so the IPC can complete file writes, preserve system state, and perform a controlled shutdown.
Q: Why is it important in industrial automation?
A: It protects PLC programs, machine data, and file systems from corruption, ensuring safe recovery and reducing downtime after unexpected power loss.
Q: What makes it different from a standard UPS?
A: It is a dedicated industrial DC battery module designed specifically for seamless integration with Beckhoff IPC and UPS systems, rather than a standalone AC UPS device.
Maintenance Tips
• Check battery charge status regularly and replace when capacity drops below safe backup thresholds.
• Ensure correct DIN-rail mounting and secure connection to the UPS system for reliable backup switching.
• Keep operating environment within recommended temperature range to extend battery life and prevent degradation.
• Perform periodic discharge tests to verify actual backup time and UPS performance.
• Inspect terminals and connectors for corrosion, looseness, or heat discoloration.
• Avoid deep discharge cycles to maximize lifespan of the 24 V 1.2 Ah battery pack.
• Store spare batteries in a cool, dry environment and follow manufacturer storage guidelines.
• Keep ventilation clear around the UPS system to prevent overheating during charging cycles.
• Replace the battery pack only with approved models from Beckhoff Automation to ensure compatibility and safety.
• Monitor UPS diagnostics for alarms, low-voltage warnings, or charging irregularities.
Damage 
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