Buffered switching power supply PULSAR HPSB-24V2A-B 27.6V 2A for 2×7Ah batteries

PULSAR HPSB-24V2A-B is a buffered switching power supply that delivers a stabilized 27.6 V DC output at up to 2 A and is configured for use with two 7 Ah lead-acid batteries. Designed for continuous mains operation with battery backup, the unit provides charging and uninterrupted power to low-voltage devices such as alarm panels, access control units and other security system components. The device integrates power conversion, battery charging and automatic switchover to battery supply in the event of mains failure, ensuring continuity of operation for connected equipment.

Advantages

The PULSAR HPSB-24V2A-B combines a compact switching converter with a buffered output and a dedicated charging circuit for two series-connected batteries, offering efficient energy conversion, stable voltage regulation and controlled battery charging. Its automatic load transfer preserves the supply to critical devices during mains interruptions, while the buffered design minimizes voltage dips and reduces stress on connected electronics. The product is engineered for reliable, low-noise operation and straightforward integration into existing 24 V systems.

Suitable for

• Alarm control panels and security system components
• Access control readers, locks and controllers
• Small CCTV installations and peripheral devices requiring 24–27.6 V DC
• Backup power for low-power industrial or telecommunications equipment

Key specifications

• Output voltage: 27.6 V DC (nominal)
• Maximum output current: 2 A
• Battery configuration: designed for two 7 Ah lead-acid batteries
• Functionality: mains-powered operation with automatic battery backup and charging
• Topology: switching (SMPS) buffered power supply
• Intended applications: low-voltage security and access control systems

How to use

Install the unit in a dry, ventilated enclosure close to the devices it will supply. Connect the mains input according to local electrical regulations and wire the two matching 7 Ah batteries in the configuration recommended by the manufacturer. Connect the load to the DC output terminals, observing correct polarity. On mains availability the power supply provides regulated output and charges the batteries; upon mains loss it automatically transfers the load to battery supply. Periodically check battery condition and terminal connections to maintain reliable operation.

Usage recommendations

Use compatible sealed lead-acid batteries of the specified capacity and follow battery maintenance guidelines. Ensure proper ventilation and avoid placing the unit near heat sources. Verify load current does not exceed the 2 A output rating and use appropriate fusing or protection on both mains and DC outputs as required by local standards.