... of theexternal battery bankBypassAutomatic transferOn overload and UPS failureBefore UPS power-onDefault"NO",user adjustable to"YES" ... versaLED indicatorsStatusLoad level/Battery level, Battery, Utility power,Inverter,Bypass,Overload,FaultAudible alarmBypass, On battery mode,Battery low ... -9 portRS-232 serial interfaceIntelligent slotOptions:SMNP Card,AS400 Card of Winpower CMC/(USB Port)Network surge ...