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Mean Well LAD-600D Security/Fire Alarm PSU with Battery Charger/UPS, 600W, 55.2V, TTL Signal 7.87A

Name: Mean Well LAD-600D Security/Fire Alarm PSU with Battery Charger/UPS, 600W, 55.2V, TTL Signal 7.87A
Brand: Mean Well
SKU: LAD-600D
Price: 85.2 USD
Availability: InStock

built-in battery charger and UPS functionTTL signals for status detectionforced UPS mode for battery maintenance1U low profile

SKU LAD-600D

$85.20 USD

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Select model — 6 in this family

LAD-600D

LAD-120D Fixed output Backorder $38.73 USD

LAD-240D Fixed output Backorder $47.98 USD

LAD-360D Fixed output Backorder $51.83 USD

LAD-360DU UART 55.2V Backorder $62.12 USD

LAD-600D Fixed output Backorder $85.20 USD

LAD-600DU UART 55.2V Backorder $91.35 USD

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Overview

LAD-600D is the model of this series: rated power 600.02W, typical efficiency 91%. Type Blank: TTL signal only.

LAD-600 series is a 600W 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 27.6V, 41.5V and 55.2Vdc. With high efficiency up to 91% and built-in AC, battery switch for easy maintenance. In addition, LAD-600 series not only provide TTL signals for AC OK, battery disconnect, battery reverse polarity (No damage), battery low detection, battery full and discharge, but also possess UART version so the users can monitor and control the status of the units, that enhance easy way for integration into security and fire systems directly.

Features

Built-in battery charger UPS function
TTL signals for status detection: AC OK, Battery disconnect, Battery reverse polarity, Battery low, Battery full and Discharge (Blank version only)
UART Communication (U version only)
Built-in buzzer alarm (U version only)
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/GB4717(U version only) system requirement
1U low profile
3 years warranty

Model encoding

Type	Function
Blank (this model)	TTL signal only
U	UART Communication only

Specifications

LAD-600DSpecifications from the official datasheet (2024-10-30 edition)

OUTPUT

OUTPUT NUMBER: CH1, CH2
DC VOLTAGE (CH1): 55.2V
DC VOLTAGE (CH2): 55.2V
RATED CURRENT (CH1): 7.87A
RATED CURRENT (CH2): 3A(Battery Charger)
CURRENT RANGE (CH1): 0 ~ 10.87A
CURRENT RANGE (CH2): --------
RATED POWER: 600.02W
RIPPLE & NOISE (max.) (CH1)^Note.2: 360mVp-p
RIPPLE & NOISE (max.) (CH2)^Note.2: --------
VOLTAGE ADJ. RANGE: Ch1: 43.5 ~ 58V
VOLTAGE TOLERANCE (CH1)^Note.3: ±1.0%
VOLTAGE TOLERANCE (CH2)^Note.3: --------
LINE REGULATION (CH1): ±0.5%
LINE REGULATION (CH2): --------
LOAD REGULATION (CH1): ±0.5%
LOAD REGULATION (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.): 91%
AC CURRENT (Typ.): 12A/115VAC 7.5A/230VAC
INRUSH CURRENT (Typ.): COLD START 35A/115VAC 60A/230VAC
LEAKAGE CURRENT: <0.5mA Peak / 240VAC

PROTECTION

OVERLOAD^Note.4: 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^Note.4: CH1:59 ~ 69V Protection type : Shut down o/p voltage, re-power on to removed
OVER TEMPERATURE^Note.4: 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: 43V±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

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

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: 1154.4K hrs min. Telcordia SR-332 (Bellcore); 169.9K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 225*124*41mm (L*W*H)
PACKING: 1.02Kg; 12pcs/13.5Kg/0.78CUFT

Test conditions and notes7

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. Once the protection is triggered, the input voltage needs to be disconnected, and the cold machine will wait for 3 minutes before restarting.
5. 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. The final equipment must be re-confirmed that it still meets EMC directives. All the radiation tests require an additional 20*30*13 NIZN magnetic clasp or magnetic ring to the battery output line. 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 )
6. 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
7. 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

LAD-600D Suggested Application — Suggested Application

LAD-600D L A D - 6 0 0 series (2) — L A D - 6 0 0 series (2)

LAD-600D L A D - 6 0 0 series (3) — L A D - 6 0 0 series (3)

LAD-600D L A D - 6 0 0 series (4) — L A D - 6 0 0 series (4)

LAD-600D Illustration (page 9) — Illustration (page 9)

Typical applications

Downloads

Datasheet1

LAD-600D datasheetLAD-600-SPEC.PDF · 2024-10-30 edition PDF Download

FAQ

What is the Mean Well LAD-600D designed for?

The LAD-600D is a 600W security and fire alarm power supply with a built-in battery charger and UPS function. It is intended for systems that need continuous DC output with battery backup support and status monitoring.

What are the main output specifications of the LAD-600D?

This model provides a 55.2V DC output and is rated for 600W total power. Its rated output current is 7.87A, and the CH1 output voltage can be adjusted within the specified range of 43.5V to 58V.

Does the LAD-600D support battery backup operation?

Yes. The LAD-600D includes a built-in battery charger and UPS function, so it is designed to support battery-backed operation. It also includes a forced UPS mode for battery maintenance.

What battery types is the LAD-600D compatible with?

Mean Well's sheet lists selectable lead-acid and Li-ion charging curves only for the UART version (LAD-600DU). For the LAD-600D itself, the sheet specifies a 3A battery charger output on CH2 with a battery cutoff at 43V±0.5V.

What status signals are available on the LAD-600D?

The LAD-600D provides TTL signals for system status detection. These cover AC OK, battery disconnect, battery reverse polarity, battery low, battery full, and discharge status.

Can the LAD-600D be used in demanding temperature conditions?

Yes. This power supply is rated for operation from -20°C to +60°C, which supports use in a wide range of indoor equipment environments. Buyers should still confirm the overall enclosure and system design are suitable for the intended ambient conditions.

What protection features are included in the LAD-600D?

This model includes protection for overload, over voltage, over temperature, battery cutoff at 43V±0.5V, and battery reverse polarity. Mean Well also notes that reverse battery polarity causes no damage to the unit.

How does the LAD-600D differ from a standard AC-DC power supply?

Unlike a basic AC-DC supply, the LAD-600D combines regulated DC output with battery charging, UPS functionality, and TTL status signaling in one unit. That makes it better suited to monitored security and fire alarm systems that need backup power capability.

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Model	Power	Voltage	Current	IP Rating	Price
Mean Well LAD-600B Security/Fire Alarm PSU with Battery Charger/UPS, 600W, 27.6V, TTL Signal 18.74A	600.02W	27.6V	18.74A	IP20	$85.20	View
Mean Well LAD-600DU Security/Fire Alarm PSU with Battery Charger/UPS, 600W, 55.2V, UART Signal 7.87A	600.02W	55.2V	7.87A	IP20	$91.35	View
Mean Well LAD-600CU Security/Fire Alarm PSU with Battery Charger/UPS, 600W, 41.5V, UART Signal 11.45A	599.67W	41.5V	11.45A	IP20	$91.35	View
Mean Well LAD-600C Security/Fire Alarm PSU with Battery Charger/UPS, 600W, 41.5V, TTL Signal 11.45A	599.67W	41.5V	11.45A	IP20	$85.20	View
Mean Well LAD-600BU Security/Fire Alarm PSU with Battery Charger/UPS, 600W, 27.6V, UART Signal 18.74A	600.02W	27.6V	18.74A	IP20	$91.35	View
Mean Well LAD-360DU Security/Fire Alarm PSU with Battery Charger/UPS, 360W, 55.2V, UART Signal 5.03A	360.46W	55.2V	5.03A	IP20	$62.12	View
Mean Well LAD-360D Security/Fire Alarm PSU with Battery Charger/UPS, 360W, 55.2V, TTL Signal 5.03A	360.46W	55.2V	5.03A	IP20	$51.83	View
Mean Well LAD-360CU Security/Fire Alarm PSU with Battery Charger/UPS, 360W, 41.5V, UART Signal 7.14A	358.56W	41.5V	7.14A	IP20	$62.12	View
Mean Well LAD-360C Security/Fire Alarm PSU with Battery Charger/UPS, 360W, 41.5V, TTL Signal 7.14A	358.56W	41.5V	7.14A	IP20	$51.83	View
Mean Well LAD-360BU Security/Fire Alarm PSU with Battery Charger/UPS, 360W, 27.6V, UART Signal 11.5A	358.8W	27.6V	11.5A	IP20	$62.12	View
Mean Well LAD-360B Security/Fire Alarm PSU with Battery Charger/UPS, 360W, 27.6V, TTL Signal 11.5A	358.8W	27.6V	11.5A	IP20	$51.83	View
Mean Well LAD-240D Security/Fire Alarm PSU with Battery Charger/UPS, 240W, 55.2V 3.4A	242.88W	55.2V	3.4A	IP20	$47.98	View
Mean Well LAD-240C Security/Fire Alarm PSU with Battery Charger/UPS, 240W, 41.5V 4.78A	239.87W	41.5V	4.78A	IP20	$46.98	View
Mean Well LAD-240B Security/Fire Alarm PSU with Battery Charger/UPS, 240W, 27.6V 7.7A	240.12W	27.6V	7.7A	IP20	$45.98	View
Mean Well LAD-240A Security/Fire Alarm PSU with Battery Charger/UPS, 240W, 13.8V 16.4A	240.12W	13.8V	16.4A	IP20	$44.98	View
Mean Well LAD-120D Security/Fire Alarm PSU with Battery Charger/UPS, 120W, 55.2V 1.21A	121.99W	55.2V	1.21A	IP20	$38.73	View
Mean Well LAD-120C Security/Fire Alarm PSU with Battery Charger/UPS, 120W, 41.5V 1.9A	120.35W	41.5V	1.9A	IP20	$38.73	View
Mean Well LAD-120B Security/Fire Alarm PSU with Battery Charger/UPS, 120W, 27.6V 3.4A	121.4W	27.6V	3.4A	IP20	$38.73	View
Mean Well LAD-120A Security/Fire Alarm PSU with Battery Charger/UPS, 120W, 13.8V 7.7A	120W	13.8V	7.7A	IP20	$38.73	View

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