Tripp Lite's SU30K3/3INT SmartOnline 3-Phase Intelligent, True On-Line UPS System provides mission-critical equipment with the highest level of power protection available. Large capacity 30,000 VA/24,000 watt power module continually converts incoming AC power into filtered DC power, and then resynthesizes it back into AC power with a pure sine wave. Hardwire input and output connections support a variety of permanent or PDU style power connections. SU30K3/3INT features 50 or 60 Hz (auto-selectable) frequency. SU30K3/3INT includes a power module and an external battery module, both in tower format cabinets. Three built-in communication ports (RS-232, contact closure and AS-400) work with included PowerAlert Software to simultaneously provide shutdown commands and reporting on multiple servers without the need for costly accessories. An accessory slot accepts an optional internal SNMP card (model # SNMPWEBCARD) for remote shutdowns, reboots and more.