Buffer module for DIN rail, DBUF 24V/20A DBUF20-24

Buffer module for power supplies – reliable power in emergency situations

This buffer module, designed for DIN rail mounting, is an ideal solution for systems requiring uninterrupted power. It utilizes advanced electrolytic capacitors instead of traditional batteries, eliminating the need for regular replacement and ensuring a longer lifespan. DBUF20-24 is an excellent choice for both professional installers and end-users who value power stability and safety.

Features and applications

The DBUF20-24 buffer module is designed to work with regulated 24V DC power supplies. Its main task is to maintain the output voltage in the event of a momentary power failure. This protects sensitive devices from damage and data loss. The ability to switch between two operating modes – Fixed and Dynamic – allows you to adapt the module's operation to specific application needs. Fixed mode maintains a constant buffering voltage of 22V DC, while Dynamic mode initiates buffering when the voltage drops by 1V DC.

The module finds application in monitoring systems, industrial automation, alarm systems, and anywhere reliable emergency power is required. The ability to connect several modules in parallel allows you to extend the power backup time, which is particularly important in critical applications.

Characteristics and benefits

• Long lifespan: The use of electrolytic capacitors eliminates the need for regular replacement, unlike traditional batteries.
• Fast response time: The module quickly switches to buffering mode in the event of a power failure (typical time is 350ms at 22Vdc/20A).
• Versatility: Two operating modes (Fixed/Dynamic) allow for optimal adaptation to a specific application.
• Status indication: Built-in LEDs indicate the module's status – ready to operate, charging, or buffering.
• Protections: The module has protections against overvoltage, overload, and short circuit, ensuring safe system operation.
• Easy installation: Compact dimensions (63 x 125.2 x 114.9 mm) and DIN rail mounting simplify installation and integration with existing infrastructure.
• Control signals: Available output signals (Ready, Buffering, Inhibit) allow for remote monitoring of the module's status and control of its operation.
• Expandability: Parallel connection increases the available output current or power backup time.

Technical specifications

The DBUF20-24 module is characterized by an input voltage range of 22 to 29 VDC and a maximum output current of 20A. The capacitor charging time is a maximum of 25 seconds, and the backup time depends on the load and can reach up to 60 seconds. The module meets the requirements of UL62368-1 and IEC62368-1 safety standards and has a CE certificate confirming compliance with European directives.