40 Amp DC Uninterruptable Power Supply for DIN Rail Mount - Battery controller for DIN Rail UPS system Specifications +++Size (L x W x H) (inches): 4.9 x 2.2 x 4.9 +++DC Input: 24-29V @ 40A +++Battery Input: 21-29V @ 0-40A, Charge current: 2A +++External Battery (typical): 4 / 7 / 12AH / 24V +++Suitable for 24V system up to 40A +++Parallel connection to DC BUS +++Built-in battery test function +++Battery polarity protection +++3-year warranty +++Certifications: CE