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Mean Well LAD-240B Security/Fire Alarm PSU with Battery Charger/UPS, 240W, 27.6V 7.7A
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Mean Well LAD-240B Security/Fire Alarm PSU with Battery Charger/UPS...
Overview
LAD-240B is the CH1: 27.6V / CH2: 27.6V output model of this series: rated current CH1: 7.7A / CH2: 1A(Battery Charger), rated power 240.12W, typical efficiency 87.5%.
LAD-240 series is a 240W economical AC/DC low profile security power supply with UPS function. Adopting the input range from 90Vac to 264Vac (115Vac/230Vac selectable by switch) and supports output 13.8V, 27.6V, 41.5V and 55.2Vdc. With high efficiency up to 88% and built-in AC, battery switch for easy maintenance. In addition, LAD-240 series also provide TTL signals for AC OK, battery disconnect, battery reverse polarity (No damage), battery low detection, battery full and discharge, to allow easy integration into security and fire systems directly.
Features
- Built-in battery charger and UPS function
- TTL signals for status detection: AC OK, Battery disconnect, Battery reverse polarity, Battery low, Battery full and Discharge
- Built-in AC and battery circuit ON/OFF switches enhance safetyness during maintenance
- Forced UPS mode for battery maintenance
- Protections: Short circuit / Overload / Over voltage / Over temperature / Battery low voltage / Battery reverse polarity (No damage)
- -20 ~ +60℃ wide operating temperature
- Output voltage adjustable (-20%~+5%) for CH1 by VR
- Suitable for lead acid and lithium-ion batteries
- Design refer to GB17945 system requirement
- 1U low profile (30 mm)
- 3 years warranty
Specifications
OUTPUT
- OUTPUT NUMBER
- CH1 / CH2
- DC VOLTAGE
- CH1: 27.6V / CH2: 27.6V
- RATED CURRENT
- CH1: 7.7A / CH2: 1A(Battery Charger)
- CURRENT RANGE
- CH1: 0 ~ 8.7A / CH2: --------
- RATED POWER
- 240.12W
- RIPPLE & NOISE (max.)Note.2
- CH1: 150mVp-p / CH2: --------
- VOLTAGE ADJ. RANGE
- CH1: 21.6 ~ 29V
- VOLTAGE TOLERANCENote.3
- CH1: ±1.0% / CH2: --------
- LINE REGULATION
- CH1: ±0.5% / CH2: --------
- LOAD REGULATION
- CH1: ±0.5% / CH2: --------
- SETUP, RISE TIME
- 2000ms, 50ms/230VAC 2000ms, 50ms/115VAC at full load
- HOLD UP TIME (Typ.)
- 16ms/230VAC 12ms/115VAC at full load
- BATTERY STATIC DISCHARGE CURRENT
- <100μA
INPUT
- VOLTAGE RANGE
- 90 ~ 132VAC / 180 ~ 264VAC by switch 240 ~ 370VDC (Default switch at 230VAC)
- FREQUENCY RANGE
- 47 ~ 63Hz
- EFFICIENCY (Typ.)
- 87.5%
- AC CURRENT (Typ.)
- 4.4A/115VAC 2.4A/230VAC
- INRUSH CURRENT (Typ.)
- COLD START 60A/115VAC 60A/230VAC
- LEAKAGE CURRENT
- <0.5mA / 240VAC
PROTECTION
- OVERLOAD
- CH1:105 ~ 135% CH2:90 ~ 110% Protection type : CH1 OLP, CH2 with battery: The unit will enter to UPS mode when CH1 is around 105%~120%, when total output of CH1 + CH2 reach around 125%~135% output shuts down CH1 OLP, CH2 without battery:Shut down o/p voltage,re-power on to removed CH2 : Constant current limiting; fault condition does not affect CH1 working,recovers automatically after fault condition is removed (External fuse is mandatory in series connection with battery for protection)
- OVER VOLTAGE
- CH1:31 ~ 36V Protection type : Shut down o/p voltage, re-power on to removed
- OVER TEMPERATURE
- Protection type : Shut down o/p voltage, re-power on to removed
- BATTERY REVERSE POLARITY
- Protected when reverse polarity , no damage, recovers automatically after fault condition is removed
- BATTERY CUTOFF
- 21.5V±0.5V
FUNCTION
- AC OK
- TTL signal, High / Open : AC Fail ; Low : AC OK ; Ice : max. 30mA@ 50VDC
- BATTERY DISCONNECT/ REVERSE POLARITY
- TTL signal, High / Open : Battery connect/normal ; Low : Battery disconnect/reverse polarity; Ice : max. 30mA@ 50VDC
- BATTERY LOW
- TTL signal, High / Open : Battery normal ; Low : Battery low; Ice : max. 30mA@ 50VDC
- BATTERY FULL
- TTL signal, High / Open : Battery charging ; Low : Battery full ; Ice : max. 30mA@ 50VDC
- DISCHARGE
- TTL signal, High / Open : Charge ; Low : Discharge ; Ice : max. 30mA@ 50VDC
ENVIRONMENT
- WORKING TEMP.
- -20 ~ +60℃ (Refer to "Derating Curve")
- WORKING HUMIDITY
- 20 ~ 95% RH non-condensing
- STORAGE TEMP., HUMIDITY
- -30 ~ +85℃, 10 ~ 95% RH non-condensing
- TEMP. COEFFICIENT
- ±0.03%/℃ (0 ~ 50℃)
- VIBRATION
- 10 ~ 500Hz, 5G 10min./1cycle, 60min. each along X, Y, Z axes
SAFETY & EMC
- SAFETY STANDARDS
- UL62368-1, BS EN/EN62368-1, AS/NZS62368.1, EAC TP TC 004 approved; Design refer to GB 17945-2010
- WITHSTAND VOLTAGE
- I/P-O/P:3KVAC I/P-FG:2KVAC O/P-FG:0.5KVAC
- ISOLATION RESISTANCE
- I/P-O/P, I/P-FG, O/P-FG:100M Ohms / 500VDC / 25℃/ 70% RH
- EMC EMISSION
-
Parameter Standard Test Level Conducted BS EN/EN55032 (CISPR32), EAC TP TC 020 Class A Radiated BS EN/EN55032 (CISPR32), EAC TP TC 020 Class A - EMC IMMUNITY
-
Parameter Standard Test Level ESD BS EN/EN61000-4-2 Level 3, 8KV air; Level 2, 6KV contact; criteria A Radiated BS EN/EN61000-4-3 Level 3, 10V/m; criteria A EFT / Burst BS EN/EN61000-4-4 Level 3, 2KV; criteria A Surge BS EN/EN61000-4-5 Level 3, 1KV/Line-Line ;2KV/Line-FG ;criteria A Conducted BS EN/EN61000-4-6 Level 3, 10V; criteria A Magnetic Field BS EN/EN61000-4-8 Level 4, 30A/m; criteria A
OTHERS
- MTBF
- 1394.9K hrs min. Telcordia SR-332 (Bellcore); 156.7K hrs min. MIL-HDBK-217F (25℃)
- DIMENSION
- 215*115*30mm (L*W*H)
- PACKING
- 0.75Kg; 15pcs/12.25Kg/0.7CUFT
Test conditions and notes6
- 1. All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25℃ of ambient temperature.
- 2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1μF & 47μF parallel capacitor.
- 3. Tolerance : includes set up tolerance, line regulation and load regulation.
- 4. The power supply is considered a component which will be installed into a final equipment. All the EMC tests are been executed by mounting the unit on a 360mm*360mm metal plate with 1mm of thickness. Radiation testing requires adding 13*26*30NIZN magnetic loops or buckles to the battery output wire. The final equipment must be re-confirmed that it still meets EMC directives. For guidance on how to perform these EMC tests, please refer to “EMI testing of component power supplies.” (as available on https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf )
- 5. This power supply does not meet the harmonic current requirements outlined by BS EN/EN61000-3-2. Please do not use this power supply under the following conditions: a) the end-devices is used within the European Union, and b) the end-devices is connected to public mains supply with 220Vac or greater rated nominal voltage, and c) the power supply is: - installed in end-devices with average or continuous input power greater than 75W, or - belong to part of a lighting system Exception: Power supplies used within the following end-devices do not need to fulfill BS EN/EN61000-3-2 a) professional equipment with a total rated input power greater than 1000W; b) symmetrically controlled heating elements with a rated power less than or equal to 200W
- 6. The ambient temperature derating of 3.5℃/1000m with fanless models and of 5℃/1000m with fan models for operating altitude higher than 2000m(6500ft).
Technical drawings
Typical applications
- Fire emergency and evacuation system
- Public safety battery back-up
- Security system
- Uninterruptible DC-UPS system
- Central monitoring system
- Industrial automation
Downloads
Datasheet1
FAQ
What is the Mean Well LAD-240B designed for?
The LAD-240B 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 27.6V DC output plus battery-backed operation during AC power loss.
What are the main electrical ratings of the LAD-240B?
This model is rated for 240W total output power with a 27.6V DC output and 7.7A rated current, plus a 1A battery charger output. The output voltage for CH1 is adjustable within a 21.6V to 29V range.
Does the LAD-240B support battery backup operation?
Yes. It includes a built-in battery charger and UPS function, and it also provides a forced start UPS mode, selected by shorting CN2 pins 7 and 8.
What status monitoring signals are available on the LAD-240B?
The power supply provides TTL status signals for AC OK, battery disconnect, battery reverse polarity, battery low, battery full, and discharge. These signals can help support system-level status detection in monitored security or fire alarm applications.
What protection features does the Mean Well LAD-240B include?
The LAD-240B includes protection for overload, over voltage, over temperature, battery low voltage (cutoff at 21.5V±0.5V), and battery reverse polarity. The battery reverse polarity protection is specified as no-damage protection.
Is the LAD-240B suitable for demanding operating environments?
Yes. It is rated for operation from -20°C to +60°C (with derating per the derating curve) and is built in a low-profile 30mm-high case. It also meets listed safety and EMC approvals including UL62368-1, EN62368-1, AS/NZS62368.1, and EN55032 Class A.
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