LAD-240D

The Mean Well USA LAD-240D is an economical, low-profile AC/DC power supply designed for security and fire alarm systems, featuring a built-in UPS function. It accepts a wide input voltage range from 90VAC to 264VAC and supports multiple output voltages, including 55.2VDC for this specific model.

With a rated power of 240W and high efficiency up to 88%, the LAD-240D ensures reliable performance. It includes essential protections such as short circuit, overload, over voltage, over temperature, battery low voltage, and battery reverse polarity. The unit operates within a wide temperature range of -20°C to +60°C.

Key features include TTL signals for status detection (AC OK, battery disconnect, battery low, etc.), making integration into security systems straightforward. The power supply is designed for chassis mounting and has a compact, low-profile 1U form factor (30mm height). It is suitable for lead-acid and lithium-ion batteries, providing a robust backup power solution.

Applications for the LAD-240D series include fire emergency and evacuation systems, public safety battery back-up, security systems, uninterruptible DC-UPS systems, central monitoring systems, and industrial automation.