The ERDN40 series is a 40A redundant module designed to be used with power supplies to enhance the reliability of system operations. The key features of the product include: Selectable input voltages of 12V, 24V, and 48V. -Supports N + 1 and 1 + 1 redundant systems. -Features built-in dual DC input terminals and a single output terminal. -Uses MOSFET technology to reduce thermal loss and minimize the voltage difference between input and output. -Includes two built-in DC OK relay contacts for monitoring output status. -Has an ultra-wide operating temperature range from -40 to +80°C.