Schneider AP4423 Rack-Mounted Automatic Transfer Switch Module
I. Working Principle
As a rack-mounted automatic transfer switch (ATS), the core function of AP4423 is to realize seamless switching between two power supplies, ensuring continuous power supply for load equipment. Its working principle is as follows:
Power Monitoring: It real-time monitors key parameters such as voltage, frequency, and phase of the main power supply (common power supply) and the standby power supply. The built-in sensors and intelligent chips are used to determine whether the power supply is normal.
Fault Judgment: When the main power supply has faults such as power failure, abnormal voltage (overvoltage/undervoltage), or frequency deviation, the module quickly identifies and triggers the switching logic.
Fast Switching: After confirming the failure of the main power supply, the internal relay mechanism completes the switching from the main power supply to the standby power supply within 10ms, ensuring uninterrupted power supply for the load equipment. If the main power supply returns to normal, the module will automatically (or according to preset logic) switch back to the main power supply.
Status Feedback: Through the LCD display and communication interface, it real-time feeds back the current power supply status, switching records, and fault information, supporting local viewing and remote monitoring.
II. Functional Features
Highly Reliable Power Switching
- Dual 230V AC inputs, supporting automatic switching between main and standby power supplies with a switching time of ≤10ms, avoiding restart or damage of load due to power failure.
- Equipped with 10kAIC overcurrent protection, which cuts off the circuit in extreme cases such as sudden short circuits to protect the backend equipment.
Flexible Interface and Load Adaptation
- The input interface is C20, and the output includes 8 C13 couplers and 1 C19 coupler, compatible with power plugs of servers, switches, and other equipment.
- Rated current is 16A, maximum input current is 20A, and rated power is 3700VA, meeting the power supply needs of small and medium-sized rack equipment.
Intelligent Monitoring and Management
- Equipped with a color LCD display, which intuitively shows the status of the two power supplies, switching mode, load current, and other information, supporting local operation and configuration.
- Supports Modbus, SNMP, Telnet, and Web management interfaces, enabling remote monitoring of power status, configuration of switching logic, and firmware upgrade, facilitating centralized operation and maintenance.
Compact Design and Environmental Adaptability
- 1U rack-mounted design (size 432x236x44mm), weight only 3.74kg, supporting horizontal/vertical installation, saving computer room space.
- Operating temperature range is -5℃ to 45℃, humidity is 5%-95% (no condensation), adapting to closed environments such as computer rooms and data centers.
Safety and Compliance
- Passed international certifications such as UL, CE, and FCC, and complies with RoHS environmental protection standards, ensuring electrical safety and environmental protection requirements.
III. Application Fields
Data Centers and Server Rooms
It provides redundant power protection for key IT equipment such as servers, storage devices, and network switches, avoiding data loss or business interruption caused by single power supply failure.
Communication Rooms
It ensures the continuous power supply of communication equipment such as routers and base station controllers, ensuring the stable operation of communication networks, especially suitable for scenarios sensitive to downtime.
Industrial Control Centers
It provides power redundancy for industrial equipment such as PLC control cabinets and monitoring systems, preventing production line shutdown due to power failure.
Commercial and Medical Facilities
It is used in small computer rooms (such as hospital ICU monitoring equipment, shopping mall security systems) to ensure the continuity of power supply for key loads and reduce operational risks.
With fast switching, intelligent management, and compact design, AP4423 has become an ideal power protection solution for small and medium-sized rack equipment, widely used in scenarios with high requirements for power continuity.
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