Battery controller for Din rail UPS systems Input 22…27.5VDC (RS ; 789-4073 789-4073 ) and Input Input 11…14VDC (RS ; 789-4079 789-4079 ) Built in battery test function Relay alarm outputs, DC bus OK, Battery discharge, Battery fail Battery low voltage disconnect (LVD) User accessible battery fuse LED indicators, DC bus OK, Battery discharge, Battery fail Three position charge current selection 3 years warranty