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Battery Asymmetry Unit (BAU) Battery Monitoring, BAU48/4 Features and Benefits Small size box – Simple installation and add on to Controller function Easy-to-use and easy-to-wire Controls up to 4 battery strings DC Power for Business-Critical Continuity™ Description BAU 48/4 detects battery backup system failures by comparing the total and the central point voltages in battery strings. Battery cell failures, open circuit or short circuit failures causes voltage changes that activate a preset voltage difference alarm. The unit can be connected to Emerson Network Power Controllers (SCU, SCU+, ACU, ACU+). Battery Asymmetry Unit (BAU) DC Power for Business-Critical Continuity™ Technical Specifications, BAU48/4 Inputs Power Supply Battery Input Voltage Measurement Alarm Output Relay Relay Capacity 40 to 60 VDC, <25 mA 4 inputs, 0 to 60 VDC NO or NC Max Power: 60 W Max Voltage: 60 VDC Max Current: 2 A Control and monitoring LED Green - Power ON Red - Fault Alarm Set Points Alarm Threshold Settings +/- 2.0 VDC +/-1.75 VDC +/-1.5 VDC +/-1.0 VDC +/-0.5 VDC Mechanical and Environmental Parameters Dimensions (H × W × D) 23 × 98 × 76mm or 0.9 × 3.9 × 3.0 Inch Weight 0.2kg (0.4lbs) Operating Temperature Range -10℃ to 50℃ (-14℉ to 122℉) Relative Humidity 95% Accessories 4 battery fuses, 5A Ordering Information Product Name BAU48/4 Battery Asymmetry Unit Powe Power System Battery Midpoint Alarm Output battery string 1 + - 1 2 3 4 BAT- BAT+ battery string 2 BAT- BATBAT- cable fuse 1 BAT+ battery string 3 BAT+ battery string 4 BAT+ cable fuse 2 cable fuse 3 cable fuse 4 Emerson Network Power. The global leader in enabling Business-Critical Continuity™ Emerson Network Power www.emersonnetworkpower.com www.emersonenergy.com (Energy Systems, Europe) www.emersonnetworkpower.com/energysystems (Energy Systems, North America) AC Power Embedded Power Precision Cooling Connectivity Monitoring Racks & Integrated Cabinets DC Power Outside Plant Services Embedded Computing Power Switching & Controls Surge Protection Business-Critical Continuity, Emerson Network Power and the Emerson Network Power logo are trademarks and service marks of Emerson Electric Co. ©2008 Emerson Electric Co. 2008.11