EA-PSB 10500-20 2U 3000W Programmable Bidirectional DC Power Supply with Recuperation

The EA-PSB 10500-20 2U is a high-precision, programmable, and bidirectional DC power supply that integrates the functions of a laboratory-grade power source and an electronic load into a single 2U rack-mount unit. As the EA-PSB 10500-20 2U Bidirectional PSU, 500V Programmable Source, and 20A Electronic Load, it enables seamless switching between sourcing and sinking modes at the zero-crossing point. Its standout feature is its recuperative capability, acting as a 3000W Recuperative System that feeds up to 95% of the absorbed energy back into the AC mains with 95% Efficiency Recuperation, significantly reducing operating costs and heat dissipation. It delivers clean, stable power with exceptional regulation performance, including 0.05% Voltage Regulation (CV mode) and 0.1% Current Regulation (CC mode), and low output noise characterized by 40mV RMS Ripple and 500mV PP Ripple. With a 240uF Output Capacitance, it ensures stable operation during dynamic load changes. In sink mode, it requires a minimum input voltage of 2.5V Minimum Sink Voltage to draw the full rated current and offers a wide programmable resistance range of 1-1500 Ohm Range. The device is equipped with a color TFT touchscreen, multiple built-in interfaces (USB, Ethernet, Analog), and supports optional digital interface modules (CAN, Profibus, Profinet, etc.), parallel master-slave operation (up to 64 units), and an integrated function generator for creating complex test profiles. It is designed for demanding applications such as testing power supplies, batteries, fuel cells, solar inverters (with built-in PV/FC simulation), and power electronics.

Key Features

• Bidirectional & Recuperative Operation: Combines a precision 500V/20A/3000W DC power source with a high-speed electronic load. In sink mode, it recuperates energy with up to 95% efficiency back to the AC grid, acting as a 3000W Recuperative System.
• Exceptional Accuracy & Low Noise: Provides highly stable output with 0.05% Voltage Regulation and 0.1% Current Regulation. Features low output ripple of 40mV RMS and 500mV peak-to-peak for sensitive applications.
• Wide Operating Ranges: Offers 0-500V output/input voltage, 0-20A current, and 0-3000W power. In resistance mode (sink), covers a range from 1 to 1500 Ohms.
• Advanced Control & Interfaces: Features a 5" color TFT capacitive touchscreen for intuitive operation. Comes with built-in USB, Ethernet, and isolated analog interfaces. Supports optional plug-in modules for CAN, CANopen, Profibus, Profinet, ModBus TCP, EtherCAT, and more.
• High Power & Scalability: Delivers up to 3000W of continuous power. Supports master-slave parallel operation with the Share Bus and Master-Slave Bus, allowing systems of up to 64 units for higher power or current requirements.
• Integrated Function Generator: Includes a versatile built-in function generator capable of creating sine, triangle, rectangle, trapezoid, arbitrary, and specialized waveforms (e.g., DIN 40839, PV/FC simulation, battery test, MPP tracking).
• Comprehensive Protection & Monitoring: Equipped with adjustable OVP, OCP, OPP, overtemperature (OT), and power fail (PF) protections. Provides extensive monitoring capabilities and user-definable event alarms.
• Robust Construction: Housed in a standard 19-inch, 2U high rack-mountable chassis with forced air cooling (front to rear). Designed for reliable operation in industrial environments.