Buffered switch-mode power supply for installation PSB 13.8V/7A PSB-12V7A

Buffered power supply for security and automation systems

This Pulsar PSB-12V7A buffered power supply is a reliable solution for ensuring continuous power to devices requiring a stable 12V DC voltage. It is ideal for alarm systems, CCTV, access control and other applications where a power outage can have critical consequences. The device is characterized by high efficiency and a solid construction, guaranteeing long-term and trouble-free operation.

Functionality and application

The PSB-12V7A power supply is designed to operate in buffer mode, which means that under normal conditions the power is supplied from the AC mains, and in the event of a power failure, it automatically switches to battery power. This protects connected devices from sudden power interruptions. The battery charging current can be adjusted using a jumper (1A or 2A), allowing it to be adapted to the specifics of a given battery and application. LED indicators inform about the presence of AC voltage, DC voltage and battery charging process.

Safety and protection

The power supply is equipped with a number of protections that protect both connected devices and the power supply itself from damage. These include:

• SCP (Short Circuit Protection) – short-circuit protection
• OLP (Overload Protection) – overload protection
• OVP (Over Voltage Protection) – overvoltage protection
• UVP (Under Voltage Protection) – protection against deep battery discharge

Additionally, the housing provides adequate insulation and safety of use. Protection class I requires connection of a protective conductor.

The power supply operates at an input voltage of 200-240 V AC and provides 13.8 V DC at the output with a maximum current of 7 A (total output current including battery charging). Its power is 97 W, and the efficiency reaches 87%. The dimensions of the device are 159 x 42 x 98 mm (+/-2 mm). It has SCP, OLP, OVP and UVP protections. Operating status is indicated by LED diodes (AC, DC, charging). Mounting on a DIN rail is possible using a DIN3 bracket (available separately).

This model is a solid choice for both professional installers of security and building automation systems, and for end users looking for a reliable power source for their devices.