INTRODUCTIONEATON Powerware® 9395 UPS (450–550 kVA) Installation and Operation Manual 164201701 Rev 2 www.powerware.com1−61.2.8 Input Output Module ConfigurationThe UPS can be supplied in an Input Output Module (IOM) configuration without thebypass input connections, the static switch, the motorized wraparound bypassbreaker, and the backfeed protection contactor. This configuration is primarily used inmultiple UPS parallel systems that do not need a bypass for each UPS and use aseparate System Bypass Module (SBM) to provide system bypass capabilities.1.2.9 Inherent RedundancyTo deliver greater reliability, the Powerware 9395 UPS can be configured by anauthorized Eaton Customer Service Engineer for inherent redundancy. Whenconfigured, the UPS automatically becomes redundant if the load is at or below thecapacity of the UPMs minus the capacity of one UPM. Under normal conditions theUPMs in the UPS share the load equally. If one or more UPMs becomes unavailableand the load is at or below the capacity of remaining UPMs, the remaining UPMssupply the load instead of transferring to bypass.If the capacity of the UPMs falls below the redundancy level or the load increasesabove redundancy level, but is still able to maintain the load, a loss of redundancyalarm is sounded. If the load exceeds the capacity of remaining UPMs, the UPStransfers to bypass.1.2.10 Energy Saver and High Alert ModesEnergy Saver mode allows the UPS to operate in Bypass mode. In this mode, theUPS is operating on bypass, with the UPMs in standby, ready to automaticallytransfer to Normal mode if a commercial electrical power brownout, blackout,overvoltage, undervoltage, or out-of-tolerance frequency condition occurs.In High Alert mode the unit transfers from Energy Saver mode to Normal mode(inverter online) or if in Normal mode remains in Normal mode for a default timeperiod of one hour. The High Alert mode time period is configurable by an EatonCustomer Service Engineer. High Alert mode allows the user to place the unit onlinewith full protection when outside conditions could cause a power disturbance. At thecompletion of the time period, the unit defaults back to Energy Saver mode. If theHigh Alert command is received during the time period, the timer will be restarted.1.2.11 Monitoring and Communication Remote Monitor Panel II (RMP II) – An optional RMP II contains backlit statusindicators and a local horn, allowing monitoring of the operational status and alarmcondition of the UPS from virtually any location within the facility. Relay Interface Module II (RIM II) – An optional RIM II uses relay contact closures toindicate the UPS operating status and alarm condition. Supervisory Contact Module II (SCM II) – An optional SCM II establishes an interfacebetween the UPS system equipment and the customer’s monitor. X−Slot Cards – Optional X−Slot cards support several protocols, such as SNMP,HTTP, IBM® AS/400®, and Modbus®.
