MEAN WELL LAD-360B is a security power supply with a 27.6 V main output, a separate 1.5 A battery-charging channel and DC UPS backup capability. The main output is rated 11.5 A and both channels share a 358.8 W total output budget. This version provides TTL status signals. Select the 115/230 VAC input range by switch and apply the specified load and temperature derating.
Product Datasheet
Download MEAN WELL LAD-360 Datasheet (PDF)
The LAD-360 section is on PDF pages 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34. Refer to the complete mechanical drawings and notes when planning installation.
Model and Configuration
| Complete model |
LAD-360B |
| Series |
LAD-360 |
| Output code |
B: 27.6 V DC |
| Interface version |
Blank suffix: TTL status signals only |
The unit supplies a main DC load on CH1 and a separate battery-charging channel on CH2. With a suitable external battery it supports DC UPS backup. The built-in AC and battery-circuit ON/OFF switches support isolation during maintenance.
Suitable applications include fire-emergency and evacuation systems, public-safety backup, security systems, central monitoring and industrial automation. Select the battery and system controls for the required application. The stated three-year warranty applies to the power supply.
Main Output, Charging Channel and Shared Power
| CH1 output voltage |
27.6 V |
| CH1 rated current |
11.5 A |
| CH2 charge voltage |
27.6 V |
| CH2 rated charging current |
1.5 A |
| Rated total output power |
358.8 W |
| CH1 current range |
0–13 A |
| CH1 voltage adjustment |
21.6–29 V by VR |
| CH1 maximum ripple and noise |
150 mVp-p |
| CH1 voltage tolerance |
±1% |
| CH1 line / load regulation |
±0.5% / ±0.5% |
The 358.8 W figure is the total CH1 + CH2 power budget, not an independent rating for each channel. The CH1 rated-current point accompanies the 1.5 A charging allocation. A higher CH1 current within its listed range must still respect the combined power limit; the two channel maxima are not an unrestricted simultaneous operating point.
The series supports suitable lead-acid and lithium-ion batteries. Match the battery chemistry, voltage and charging current to the supplied configuration. Adjust CH1 only within the stated VR range and keep the load within the current, total-power and derating limits. The catalogue does not specify an independently adjustable CH2 voltage or separate CH2 ripple/tolerance guarantee.
Unless otherwise stated, specifications are measured at 230 VAC input, rated load and 25°C ambient. Voltage tolerance includes set-up tolerance, line regulation and load regulation. Ripple/noise is measured with 20 MHz bandwidth using a 12-inch twisted pair terminated with 0.1 µF and 47 µF capacitors.
Input and Timing
| AC input range |
90–132 VAC / 180–264 VAC, selected by switch |
| DC input range |
240–370 VDC |
| Input frequency |
47–63 Hz |
| Typical efficiency |
86% |
| Typical AC input current |
8 A at 115 VAC; 4 A at 230 VAC |
| Typical cold-start inrush |
60 A at 115 VAC; 60 A at 230 VAC |
| Leakage current |
<0.5 mA at 240 VAC |
Select the correct 115/230 VAC input range before energizing; the factory switch setting is 230 VAC. This is a manually selected input, not a single automatic 90–264 VAC range.
Set-up time is 2000 ms and rise time 50 ms at full load for both 115 VAC and 230 VAC. Typical hold-up time is 16 ms at 230 VAC or 12 ms at 115 VAC, at full load. Battery static-discharge current is less than 100 µA.
Protection and Battery Operation
| Overload threshold |
CH1: 105–135%; CH2: 90–110% |
| CH1 overvoltage threshold |
31–36 V |
| Battery cutoff |
21.5 V ±0.5 V |
With a battery connected, a CH1 overload around 105–120% transfers the unit to UPS mode; when the combined CH1 + CH2 output reaches around 125–135%, the output shuts down. Without a connected battery, the CH1 overload response is shutdown and reapplication of input power to recover.
CH2 overload uses constant-current limiting. A CH2 fault does not stop CH1 operation, and CH2 recovers automatically after the fault is removed. An external fuse is mandatory in series with the battery for protection; select the fuse and wiring for the actual installation.
CH1 overvoltage and overtemperature protection shut down the output and require reapplication of input power. Battery reverse polarity is protected without damage and recovers automatically after the connection fault is removed. Short-circuit protection is listed among the series features; the individual overload responses and external battery-fuse requirement still apply.
DC UPS and TTL Status Signals
When AC falls below 75 VAC on the 115 VAC setting or below 165 VAC on the 230 VAC setting, the UPS function transfers the load to the external battery.
CN2 is the 8-pin TTL-version connector. Pin 1=AC OK; pin 2=battery disconnected/reverse polarity; pin 3=battery low; pin 4=signal GND; pin 5=battery full; pin 6=discharge; pins 7–8=forced-start UPS control. Short pins 7 and 8 to force UPS mode, or leave them open for normal operation.
TTL status outputs require an external voltage source and resistor. Maximum applied voltage is 50 VDC and maximum sink current 30 mA; a low state is at most 0.3 V at 30 mA, and high/open uses the external applied voltage. Reference the status outputs to CN2 pin 4.
AC OK: low means AC input normal, high/open means abnormal. Battery disconnected/reverse polarity: low means disconnected or reversed, high/open means connected normally. This connection/reversal detection is performed only during the first power transmission, not continuously at every moment.
Battery low: low means the battery is under undervoltage protection, high/open means normal. Battery full: low means fully charged, high/open is the charging/not-full state. Discharge: low means battery discharge, high/open means mains operation.
Power Terminals and Control-Connector Wiring
This blank-suffix model uses TTL status signals and has no U-version UART connector or built-in buzzer-mode selection. The forced-start control uses CN2 pins 7–8, not the U-version pin pairs.
TB1 power terminals: 1=AC/L; 2=AC/N; 3=FG protective earth; 4=DC OUTPUT −V; 5=DC OUTPUT +V; 6=BAT−; 7=BAT+. Do not short DC OUTPUT −V to BAT−. Observe the separate battery and load terminals and use the AC/battery circuit switches as shown.
The CN2 mating housing is identified as TKP DH2 or equivalent; the mating contact is TKP DHT-1S(LF) or equivalent. Select the complete housing and wire assembly for the actual 8-pin version. These are connector references; obtain the appropriate mating parts for the supplied unit.
Environment, Cooling and Derating
| Working ambient temperature |
−20 to +60°C, subject to derating |
| Working humidity |
20–95% RH, non-condensing |
| Storage conditions |
−30 to +85°C; 10–95% RH, non-condensing |
| Temperature coefficient |
±0.03%/°C from 0 to 50°C |
| Vibration |
10–500 Hz, 5G; 10 minutes/cycle, 60 minutes each on X, Y and Z |
For horizontal mounting, the temperature curve permits 100% load from −20 to 50°C and then decreases to 60% at 60°C. Apply temperature and input limits together.
The 60 Hz input curve gives 80% load at 90 VAC, rising to 100% at 100 VAC and remaining at 100% through 132 VAC on the low range. On the high range it shows 100% throughout 180–264 VAC.
An internal fan and airflow direction are shown in the mechanical drawing. Keep the fan and ventilation openings unobstructed. For operation above 2000 m, the catalogue note reduces allowable ambient temperature by 5°C per 1000 m for fan-equipped models; altitude derating does not override the electrical or installation limits.
Safety, EMC and Reliability
| Safety standards |
UL 62368-1, BS EN/EN 62368-1, AS/NZS 62368.1 and EAC TP TC 004 approved |
| Withstand voltage |
I/P–O/P: 3 kVAC; I/P–FG: 2 kVAC; O/P–FG: 0.5 kVAC |
| Isolation resistance |
100 MΩ at 500 VDC, 25°C, 70% RH for I/P–O/P, I/P–FG and O/P–FG |
| Conducted and radiated emissions |
BS EN/EN 55032 (CISPR 32), Class A; EAC TP TC 020 |
| MTBF references |
1394.9K hours minimum, Telcordia SR-332; 153.3K hours minimum, MIL-HDBK-217F at 25°C |
Design references include GB17945-2010. This is a power-supply component; these design references do not certify an entire fire-alarm or evacuation installation.
Immunity tests list BS EN/EN 61000-4-2: level 3, 8 kV air and level 2, 6 kV contact; -4-3: level 3, 10 V/m; -4-4: level 3, 2 kV; -4-5: level 3, 1 kV line-to-line and 2 kV line-to-FG; -4-6: level 3, 10 V; -4-8: level 4, 30 A/m. Performance criterion A is stated for these tests.
The EMC setup uses a 360 × 360 mm metal plate 1 mm thick and an additional 13 × 26 × 30 mm NiZn magnetic clasp or ring on the battery output wire for radiated-emissions testing. Confirm EMC again with the complete installation.
This supply does not meet BS EN/EN 61000-3-2 harmonic-current requirements. Do not use it where all of the following apply: the end device is used in the European Union; it connects to public mains with nominal voltage 220 VAC or greater; and it has average or continuous input above 75 W or forms part of a lighting system. The catalogue lists exceptions for professional equipment with total rated input greater than 1000 W and symmetrically controlled heating elements rated 200 W or less. Verify the end-equipment category and local requirements before selection.
MTBF values are reliability calculations under the stated methods and conditions, not a guaranteed service lifetime.
Mechanical Installation and Accessories
| Catalogue enclosure dimensions |
215 × 115 × 30 mm (L × W × H) |
| Catalogue unit-weight reference |
750 g |
| Catalogue packing |
0.75 kg; 15 pcs / 12.25 kg / 0.7 CUFT |
Case 207, dimensional tolerance ±1 mm. The mechanical drawing marks 4-M4 (both sides), L=6 mm. Use the holes and allowable thread lengths appropriate to the selected mounting surface, and keep clearance around the fan, terminals and switches.
PGG2MHS012 is the separately ordered mounting bracket listed for this series. Four brackets are required per power supply; that installation quantity does not specify a four-piece retail pack. The installation diagram shows four M4 side-mounting screws and an L=6 mm side-fixing reference. Confirm supplied hardware and use the actual unit drawing for bracket alignment.
Select an external battery, series fuse, power wiring and control mating assembly for the charging voltage, current, backup duration and installation conditions. Battery capacity and backup runtime are system choices; no fixed runtime is specified here.
The unit-weight figure is the catalogue PACKING reference per unit, not a measured net or shipping weight. The carton count and carton weight are separate packing data.
