DRDN20/40 and ERDN20/40 series are a series of 20A/40A power supply parallel redundancy modules, which can be used with the backup power supply to improve the stability and reliability of the overall system. The product key features include: Supports system 1+1 and 1+N redundancy, applies 5V (ERDN20 only) /12V/24V/48V system voltage, two DC input contacts and single output, built-in two channels DC OK relay contacts for monitoring power status, adopt Mosfet technology to reduce heat loss and reduce the voltage difference between input and output voltage, -40-+80°C ultra-wide working temperature, etc., suitable for semiconductor process equipment, industrial control, factory Automation, electromechanical equipment, etc. Applications that need to ensure that the equipment is not interrupted.