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Communication and Security

Due to its high efficiency and compact size, the switching power supply has almost become the 'heart' of all electronic devices in the communications and security industries, providing stable and reliable energy. Its applications span from the core to the edge in all aspects.

Scope of Application

Telecommunications

Security

Core Network Equipment

Communication Base Stations: Macro base stations, micro base stations, and pico base stations all require high-power, high-reliability switch-mode power supply systems to convert AC or DC electricity into the -48V DC required by the equipment (standard voltage in the telecom industry).
Data Centers/Cloud Computer Rooms: Core network equipment such as servers, routers, switches, and optical transmission devices use switch-mode power supply modules (usually inside the equipment) to convert AC into DC voltages like 12V, 5V, 3.3V, etc.
Programmable Switchboards: Also use a -48V power supply system, supported by large switch-mode power supply systems.

Access and Transmission Equipment

Optical Network Unit: In fiber-to-the-home networks, the ONU devices at the user end use external or built-in low-power switch-mode power adapters.
Microwave Transmission Equipment: Microwave relay stations located in the field require industrial-grade switch-mode power supplies that can withstand harsh environments.

Terminals and Auxiliary Devices

Mobile Phone Charger/Adapter: This is the most common application of switching power supplies, enabling efficient and fast charging.
Network Cameras: Although they fall under the security category, they are also part of the communication network and typically use a 12V DC switching power supply adapter.

Video Surveillance System

Network Camera: The vast majority of IPCs require 12V DC or PoE power, and PoE switches/injectors themselves also have built-in power supplies.
HD PTZ Camera: Some high-power PTZ cameras may require 24V AC or DC power, provided by dedicated power supplies.
Network Video Recorder: NVR/DVR, as the core storage and control device, has a built-in power supply module.
Dedicated Video Surveillance Power Supply: In centralized power solutions, multi-output industrial power supplies are used to provide unified power to all cameras in the area.

Access Control and Alarm Systems

Access Controller: Usually uses a 12V DC power supply to provide power for card readers, electric locks (which may require additional power), and other devices.
Electronic Locks: Electric bolt locks and electromagnetic locks require a stable power supply with specific voltage (such as 12V/24V), provided by a switching power supply.
Alarm Host: The core of the system, equipped with a built-in or external switching power supply, which also provides power to detectors.
Perimeter Protection Systems: Such as infrared barriers and electronic fences, all require dedicated switching power supply equipment.

Building Intercom System

The entrance master station, indoor sub-stations, and management terminal all rely on a switch power supply for power.

Core Advantages

High efficiency, energy saving, and consumption reduction

The conversion efficiency of switching power supplies usually reaches over 85%, and high-quality industrial-grade products can even exceed 95%. For facilities such as communication base stations and data centers that operate continuously 24/7 and consume a large amount of electricity, high efficiency means significant electricity cost savings and lower carbon emissions, aligning with the concept of 'green communication'.

High voltage regulation accuracy, stable output

Chips (such as DSPs, CPUs) and sensors inside communication and security equipment are very sensitive to power quality. Switching power supplies have precise feedback control circuits that can provide very stable and clean DC voltage, with low ripple and noise, ensuring the stable operation and long lifespan of core components.

Wide input voltage range, strong adaptability

Communication and security equipment are often deployed in areas with complex power grid environments or unstable voltage (such as remote base stations and old residential areas). Switching power supplies usually have an extremely wide input voltage range (for example, AC 85V ~ 264V), which allows them to adapt well to power grid fluctuations, ensuring stable operation of the equipment and preventing frequent restarts or damage due to high or low voltage.

Small size, high power density

As device integration increases, internal space becomes extremely valuable. The high operating frequency of switching power supplies (tens to hundreds of kHz) allows transformers and filtering components to be made very small. This makes it easy to integrate them into compact devices such as cameras, NVRs, and switches.

Modular Design, Easy Maintenance and Redundancy

In communication power systems, modularly designed switching power supplies are commonly used. Multiple power modules can be connected in parallel like building blocks, achieving "N+1" or "N+M" redundancy. When a module fails, the system can switch seamlessly without affecting device operation and supports hot-swappable replacement, greatly enhancing the system's reliability and maintainability.

High Cost-Effectiveness

With the maturity of technology and mass production, the manufacturing cost of switching power supplies has been significantly reduced. While meeting high performance requirements, they offer excellent value for money, which is crucial for communication and security projects that require large-scale deployment.

Meets the special requirements of security and communication

Uninterrupted operation: Switching power supplies can easily work with batteries (such as the battery packs behind a -48V system) to form an uninterruptible power supply system. When the mains power is interrupted, they can immediately switch to battery power, ensuring that communication base stations and security systems continue to operate during a power outage.

Category Overview

Single Output Switching Power Supply

Single Output Switching Power Supply

Dedicated power supply: Provides a single, stable DC voltage for specific devices. It is low-cost and easy to install.

Network equipment: Provides 12V or 54V power for devices such as routers, switches, and wireless gateways.
Communication base stations: Supplies power to equipment such as BBU (Indoor Baseband Unit) at the base station.
IoT devices: Such as IoT smart boxes and security gateways.

Surveillance cameras: Provide 12V or 24V DC power for cameras.
Alarm detectors: Supply power to various sensors and alarms.
Charging Power Supply(UPS Function)

Charging Power Supply(UPS Function)

Uninterrupted protection: Provides continuous power during a mains outage, addressing issues such as power failures and voltage fluctuations.

Data centers/server rooms: Protect critical equipment such as servers, disk arrays, and network storage to prevent data loss and business interruptions.
Core communication nodes: Ensure that base station controllers, transmission equipment, and other devices operate normally during power outages.

Central Monitoring Room: Ensure uninterrupted operation of core equipment such as monitoring center servers and display screens.
Access Control System: Prevent door lock failure due to power outages and ensure area security.
Din Rail Switching Power Supply

Din Rail Switching Power Supply

Integrated/Modular: Designed specifically for electrical control cabinets, can be mounted on standard rails. Often integrates functions such as charging and monitoring.

Industrial communication networks: provide power to control devices in factory automation systems.
Wireless access points: provide integrated backup power for indoor distribution systems, WLAN sources, and the like.

Fire protection system: Provides centralized power supply for emergency lighting, evacuation indicators, and fire alarm equipment.
Building automation: Supplies power to modular devices such as access control controllers and alarm hosts.

Application Details

Single Output Switching Power Supply

Pain points: The power supply environment for outdoor equipment is harsh (grid fluctuations, wide temperature range, dust), which can easily cause system crashes.
Solution: Provide ultra-wide input voltage (e.g., 176-264Vac) and wide operating temperature (-40°C to 85°C), with built-in multiple protections to ensure that critical equipment, such as subway signaling systems, operates reliably in extreme environments.
Representative product: LRS-350

Charging Power Supply(UPS Function)

Pain Point: Unstable power grid leads to data loss or business interruptions, and traditional UPS systems have short backup times, large sizes, and high maintenance costs.
Solution: Integrate lithium battery backup to achieve zero-interruption switching. The product features wide voltage input (100-240Vac), high efficiency, and compact size, providing long-lasting, compact uninterrupted power protection for security gates, digital monitoring, and other equipment.
Representative product: SC-120

Din Rail Switching Power Supply

Pain points: Limited space for system integration, requiring flexible expansion and intelligent monitoring. Traditional power installations are complex and difficult to maintain.
Solution: Integrated intelligent communication interfaces allow remote monitoring of parameters, enabling predictive maintenance and improving the operational efficiency and system reliability of communication base stations and data centers.
Representative product: ZDR5/NDR/EDR-120

Case or Example Section

Product Link Module

DR-15 Power Supply - Small 15W Solution for Industrial Systems

Features:
Universal AC input/ full range
Protections:

Short circuit/ Over load/ Over voltage
Coolingmethod : convectioncooing
Can be installed on DIN rail TS-35/7.5 or 15
Isolation classⅡ
LED indicator for power on
No load power consumption<0.5W
100% full load burn-in test
2 years warranty

HDR-60 Din Rail Power Supply

The LEYU HDR-60 Din Rail Power Supply series includes five models (HDR-60-5/12/15/24/48) with DC outputs from 5V to 48V and rated power up to 60W. Built for industrial reliability, these units support 85–264VAC/120–370VDC input, offer efficient performance (85%–91% efficiency), and feature robust protection. With DIN rail mounting and wide voltage adjustment, they adapt seamlessly to factory automation, telecom, and IoT applications.

EDR-120 Din Rail Power Supply - 120W Stable & Efficient

Universal AC input / Full range
Protections:

Short circuit / Overload / Over voltage/ Over temperature
Cooling by free air convection
Can be installed on DlN rail TS-35/7.5 or 15
UL 508 (industrial control equipment} approved
EN61000-6-2(EN50082-2} industrial immunity level
100% full load burn-in test
2 years warranty

NDR-240 Din Rail Power Supply - Reliable & Efficient

Features:
Universal AC input/ full range
Built-in active PFC function

Protections:
Short circuit/ Over load/ Over voltage/ Over temperature
Cooling by free air convection
Can be installed on DIN rail TS-35/7.5 or 15
LED indicator for power on
100% full load burn-in test
Fixed switching frequency at 100KHz
2 year warranty