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Mean Well LAD-240D Security/Fire Alarm PSU with Battery Charger/UPS...
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Description
Description
The LAD is a Mean Well power converter.
Key Features
- ✓ DC output voltage adjustable ±10%
- ✓ 3KVAC reinforced I/O isolation
- ✓ Cooling by free air convection
- ✓ Protections: Short circuit / Overload / Over voltage / Over temperature / Reverse polarity / Under voltage
- ✓ Safety approvals: EN/EN61000-4-2 BS EN/EN61000-4-3 BS EN/EN61000-4-4 BS EN/EN61000-4-5 BS EN/EN61000-4-6 BS EN/EN61000-4-8
- ✓ 3 years warranty
Specifications
Specifications
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BrandMean Well
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SeriesLAD Series
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Power Rating240 Watt
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Output Voltage55.2 Volt
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Rated Current3.4 Ampere
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Input Voltage90V~132V
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Standards MetCB,CE,EAC,EMC,RCM,SAA
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Operating Temperature-20°C~60°C
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Warranty3 Year
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Length21.5 cm
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Width11.5 cm
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Height3 cm
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Weight0.75 kg
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Payment & Security
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Frequently Asked Questions
What is the Mean Well LAD-240D designed for?
The LAD-240D is a 240W security and fire alarm power supply with a built-in battery charger and UPS function. It is intended for applications that need a regulated 55.2V DC output plus battery-backed power continuity. Its feature set is aimed at professional security, fire, and related control-system use.
Does the LAD-240D support battery backup operation?
Yes. This model includes a built-in battery charger and UPS function, so it can support backup-power applications when used with a suitable battery. It also includes forced UPS mode for battery maintenance and status signals such as battery low, battery full, discharge, disconnect, and reverse polarity.
What battery types is the LAD-240D compatible with?
The LAD-240D is suitable for both lead acid and lithium-ion batteries. That makes it a flexible option for security and fire alarm systems that use different backup battery chemistries. Buyers should still confirm the battery system matches the unit's 55.2V output requirements.
What are the main output specifications of the LAD-240D?
This model is rated at 240W with a nominal output voltage of 55.2V and rated current of 3.4A. The CH1 output voltage is adjustable by VR within a -2% to +5% range. These specifications make it suitable for systems that require a higher-voltage DC power supply with battery charging capability.
What protections are included in the Mean Well LAD-240D?
The LAD-240D includes protection for short circuit, overload, over voltage, over temperature, battery low voltage, and battery reverse polarity with no damage. It also provides TTL status signals for AC OK and several battery conditions. These features help support system monitoring and improve resilience in critical applications.
Can the LAD-240D be used in demanding temperature conditions?
Yes. The specified operating temperature range is -20°C to +60°C, which is broader than many general-purpose indoor power supplies. That makes it a better fit for installations where ambient conditions may vary significantly.
What certifications and compliance standards does the LAD-240D meet?
The LAD-240D is approved to UL62368-1, BS EN/EN62368-1, AS/NZS62368.1, and EAC TP TC 004. It also lists EMC compliance to EN55032 Class B and related EN61000 standards, with design reference to GB 17945-2010. These approvals are relevant for buyers evaluating safety and EMC compliance in professional deployments.
How compact is the LAD-240D for panel or enclosure use?
The LAD-240D has a 1U low-profile design with dimensions of 215 x 115 x 30 mm and a weight of 0.75 kg. Its slim 30 mm height can be useful where available enclosure space is limited. This compact format helps distinguish it from bulkier security PSU options.
