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MEAN WELL LAD-240D Security Power Supply with Battery Charging, 55.2 V, 3.4 A, 242.88 W
MEAN WELL LAD-240D Security Power Supply with Battery Charging, 55.2 V, 3.4 A, 242.88 W
MEAN WELL LAD-240D Security Power Supply with Battery Charging, 55.2 V, 3.4 A, 242.88 W

At a glance

Output Voltage
55.2 V
Rated Output Current
3.4 A (CH1)
Charging Current
1 A
Input Voltage Range
90 to 132 V AC / 180 to 264 V AC selected by switch
Rated Output Power
242.88 W
Dimensions
215 x 115 x 30 mm (L x W x H)
MEAN WELL logoModel LAD-240DCurrent model

MEAN WELL LAD-240D Security Power Supply with Battery Charging, 55.2 V, 3.4 A, 242.88 W

Price on request

At a glance

Output Voltage
55.2 V
Rated Output Current
3.4 A (CH1)
Charging Current
1 A
Input Voltage Range
90 to 132 V AC / 180 to 264 V AC selected by switch
Rated Output Power
242.88 W
Dimensions
215 x 115 x 30 mm (L x W x H)

Powers fire alarm, evacuation and security equipment from the mains while charging a standby battery, and keeps it running during a power cut. Security power supply with battery charging, 55.2 V, 3.4 A, 242.88 W. Built-in battery charger and UPS function.

Rated output current
3.4 A (CH1)4.78 A (CH1)7.7 A (CH1)16.4 A (CH1)

Part of the MEAN WELL LAD-240 series. Compare all 4 models

Include the required quantity and configuration in your quote request. Price and availability will be confirmed in the quotation.

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Ask for helpDoor fit, entry methods and fitting requirements.
  • WarrantyManufacturer warranty under MEAN WELL's terms: 3 years. Warranty claims
  • DeliveryPrice, availability and delivery charges are confirmed in your quotation. Shipping and delivery

Overview

What it is

The MEAN WELL LAD-240D is a security power supply with battery charging from the LAD-240 series (240 W Economical Security/Fire Alarm PSU with Battery Charger/UPS), rated 55.2 V, 3.4 A, 242.88 W.

What it is used for

Powers 48 V fire alarm, evacuation and security equipment from the mains while charging a standby battery, and switches the load to the battery during a mains failure. TTL status outputs report AC, battery and charging state to a panel or controller. MEAN WELL lists applications such as fire emergency and evacuation systems, public safety battery backup, security systems, uninterruptible dc ups systems.

Key features

  • Built-in battery charger and UPS function.
  • TTL status signals: AC OK, battery disconnect, battery reverse polarity, battery low, battery full and discharge.
  • Built-in AC and battery circuit ON/OFF switches for safer maintenance.
  • Forced UPS mode for battery maintenance.
  • Protections: short circuit, overload, over voltage, over temperature, battery low voltage, battery reverse polarity (no damage).
  • Suitable for lead acid and lithium-ion batteries.

Key Specifications

  • Output Voltage: 55.2 V (CH1 load output).
  • Rated Output Current: 3.4 A (CH1).
  • Battery Charging Voltage: 55.2 V (CH2 battery charger output).
  • Charging Current: 1 A (CH2 rated, constant current limited).
  • Input Voltage Range: 90 to 132 V AC / 180 to 264 V AC selected by switch (default 230 V AC); 240 to 370 V DC.
  • Rated Output Power: 242.88 W.

Buying considerations

Size the unit with headroom above the connected load and check the derating information in the datasheet for high ambient temperature or low input voltage. Other models in the same series are listed on this page.

Installation considerations

MEAN WELL treats this unit as a component of the final equipment, so approvals and EMC performance should be confirmed for the complete installation. Wiring and safety details are in the official datasheet linked below.

Features

MEAN WELL LAD-240D Security Power Supply with Battery Charging, 55.2 V, 3.4 A, 242.88 W, dimension drawing
Check the datasheet for tolerances.

Size and fit

Dimensions
215 x 115 x 30 mm (L x W x H)
Weight
0.75 kg

Technical specifications

Key facts

What is it?
Access control power supplyBrand MEAN WELL, model LAD-240D
What does it output?
55.2 V, 3.4 A (CH1), 242.88 W
What input does it accept?
90 to 132 V AC / 180 to 264 V AC selected by switch
Which documents are available?
Datasheet, certificate Open documents

RelatedSeriesMEAN WELL LAD-240 series, 4 modelsGuideAccess control door setup checklistDocumentsAll MEAN WELL documents

Output

Output Voltage
55.2 V (CH1 load output)
Rated Output Current
3.4 A (CH1)
Output Current Range
0 to 4.4 A (CH1)
Rated Output Power
242.88 W
Output Voltage Adjustment Range
43.5 to 58 V (CH1)
Output Voltage Tolerance
±0.5%
Ripple and Noise (max.)
240 mVp-p
Efficiency (typ.)
88%
Battery Charging Voltage
55.2 V (CH2 battery charger output)
Charging Current
1 A (CH2 rated, constant current limited)

Input

Battery Type
Lead acid and lithium-ion
Input Frequency Range
47 to 63 Hz
Input Voltage Range
90 to 132 V AC / 180 to 264 V AC selected by switch (default 230 V AC); 240 to 370 V DC

Protection

Withstand Voltage
I/P-O/P: 3 kV AC; I/P-FG: 2 kV AC; O/P-FG: 0.5 kV AC

Environment

Operating Temperature
-20 to +60 °C (refer to derating curve)
Operating Humidity
20 to 95% RH non-condensing

Physical

Dimensions
215 x 115 x 30 mm (L x W x H)
Weight
0.75 kg

Approvals

MTBF
1394.9K hrs min. Telcordia SR-332 (Bellcore); 156.7K hrs min. MIL-HDBK-217F (25 °C)

Other

Battery Cut Off Voltage
43 V ±0.5 V
Alarm Signals
TTL signals for AC OK, battery disconnect/reverse polarity, battery low, battery full and discharge (max. 30 mA at 50 V DC)
Series
LAD-240
Warranty
Manufacturer warranty under MEAN WELL's terms: 3 years. How claims work
Product attributes and shipping details
Brand

MEAN WELL
Power Output

242.88 W

Downloads

Documentation

  • LAD-240 series datasheetPublicDatasheet · Family · meanwell.com
    Download
Certificate and compliance document (1)
  • LAD-240 CE declaration of conformityPublicCertificate · Family · meanwell.com
    Download

Series documents can differ from your exact model. Report a wrong or missing file

Questions about this product

What input voltage does the LAD-240D accept?

MEAN WELL lists 90 to 132 V AC / 180 to 264 V AC selected by switch (default 230 V AC); 240 to 370 V DC for this model.

What battery charging does the LAD-240D provide?

The datasheet gives battery charging voltage 55.2 V (CH2 battery charger output), charging current 1 A (CH2 rated, constant current limited).

Ask about this modelDoor fit, access methods, installation
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Looking for an alternative?

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