LAD-240 – power supplies with UPS function from MEAN WELL company


LAD-240 series power supplies are new economical power supplies with advanced functionality for uninterruptible power supply systems from MEAN WELL. The LAD family of power supplies was created to replace the popular AD series sources, and is characterized by advanced functionality and higher output power.

The LAD-240 series power supplies are made in a closed housing with a height of 1U, with a DC UPS function, with monitoring of the state of the external network and the battery. The output voltage is set for the use and charging of rechargeable batteries – 12, 24, 36, 48V (nominal value); the type of batteries used is lead–acid and lithium-ion; the rated power of the power supplies in the series is 240W.

Внешний вид блока питания с UPS функцией серии LAD-240The appearance of the power supply unit with UPS function of the LAD-240 series

LAD-240 power supplies can operate in two main modes:

  • The load power supply and battery charger are separated (connection via separate channels).
  • A power supply with UPS function when the load is powered by a rechargeable battery when power is lost from an external AC network.

The UPS mode is turned on forcibly by installing a jumper between pins 7, 8 (Pin7, Pin8) on the CN2 connector (Force start UPS mode). By default (without a jumper installed), the two channels (main load power and battery charge) work separately, and switching the load power from the battery does not occur when the external network is lost!

Функционал источников питания серии LAD-240The functionality of LAD-240 series power supplies

Main technical characteristics and features of LAD-240 series power supplies

  • Extended input voltage range: 90...132B / 180...264V (AC), 240...370V (DC).
  • Rated output power: 240W.
  • Output voltage according to models in the series: 13.8, 27.6, 41.5, 55.2V.
  • Number of channels: two – load connection (main) and battery connection.
  • Maximum battery charge current: 1A.
  • Operating modes: power supply and charger; power supply with UPS function.
  • Status Monitoring: TTL signals – AC OK, Battery Disconnect/Reverse Polarity, Battery Low, Battery Full, Discharge.
  • Separate switches on the power supply unit: AC main power supply circuits, battery.
  • Protection: against short circuit, overload, overvoltage, overheating, reverse polarity when connecting the battery, deep discharge of the battery.
  • Types of batteries used: lead-acid, lithium-ion.
  • Extended operating temperature range: -20°C to +60°C.
  • Voltage level adjustment via the main channel in the range: -20%...+5%.
  • Low profile 1U (30 mm).
  • Forced cooling using the built-in fan.
  • The warranty period is 3 years.
Расшифровка маркировки блока питания серии LAD-240Decoding the marking of the power supply unit

LAD-240 series power supplies can be used as UPS for security control systems, fire protection, emergency lighting, access control alarms, and centralized monitoring systems.

In more detail, the technical characteristics and features of power supplies with the LAD-240 series UPS function are presented in the Specifications on the product page. For advice or clarification of information on MEAN WELL power supplies, you can contact us by e-mail .