INTRODUCTIONEaton 9390 UPS (100–160 kVA) Installation and Operation Manual 164201604 Rev E www.eaton.com/powerquality1-41.2.4 Powerware Hot Sync Parallel SystemA parallel UPS system with two to four uninterruptible power modules (UPMs) can beinstalled to provide a parallel capacity and/or redundant system. This load sharingsystem provides more capacity than a single UPS, and can provide backup, dependingon the load and configuration. In addition, when one UPM is taken out of service formaintenance or is not operating properly, a redundant UPM continues to supplyuninterrupted power to the critical load. A Powerware Hot Sync CAN Bridge Cardprovides connectivity for system metering and operational mode control. The parallelsystem consists of two to four UPMs each with a parallel CAN Bridge Card, and amodule tie cabinet or load distribution panel to act as a tie point. Each UPM requires aseparate battery cabinet.1.2.5 Sync ControlAn optional Sync Control maintains the critical load outputs of two separate singlemodule Eaton 9390 UPS systems in synchronization. This facilitates the uninterruptedtransfer of the load from one load bus to another by means of transfer switches. TheSync Control is housed in a wall‐mounted panel that can be located between the UPSunits for easy wiring.1.2.6 Optional X-Slot CardsThe optional X-Slot cards support several protocols, such as SNMP, HTTP, AS/400®,and Modbus®. See Chapter 12, “Communication,” for additional information.1.2.7 Remote Monitor PanelAn optional Remote Monitor Panel (RMP) contains backlit status indicators and a localhorn, allowing you to monitor the operational status and alarm condition of the UPSfrom virtually any location within your facility. This option is described further inChapter 10, “Using Features and Options.”1.2.8 Relay Interface ModuleAn optional Relay Interface Module (RIM) uses relay contact closures to indicate theoperating status and alarm condition of the UPS. This option is described further inChapter 10, “Using Features and Options.”1.2.9 Supervisory Contact ModuleAn optional Supervisory Contact Module (SCM) establishes an interface between theUPS system equipment and the customer's monitor. This option is described furtherin Chapter 10, “Using Features and Options.”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.
