UPS SYSTEM INSTALLATIONEATON Eaton 9395 550/275 UPS (225–550 kVA) Installation and Operation Manual 164201716 Rev 2 www.eaton.com/powerquality4-20Table 4‐1. TB1, TB2, and TB3 Interface ConnectionsTerminal TB1 Name Description1 REPO NCInput: Normally‐closed dry contact used to activate UPS EPO from a remote switch.2 REPO Return3 REPO NOInput: Normally‐open dry contact used to activate UPS EPO from a remote switch.4 REPO Return5 Battery Aux Input: Normally‐open contact used to indicate when UPS battery breaker is open orclosed.6 Battery Aux Common7 48 Vdc Battery Shunt Trip +Output: Contacts used to open battery breaker or disconnect.8 48 Vdc Battery Shunt Trip –9 Output Contactor K3 NC AuxOutput: Normally‐closed contact opens when output contactor closes.10 Output Contactor K3 NC AuxCommonTerminal TB2 Name Description1 Pull ChainOutput: Backup control for parallel operation.2 Pull Chain Common3 Alarm Relay NCOutput: General purpose normally-closed (NC) relay contact.4 Alarm Relay Common5 Alarm Relay NOOutput: General purpose normally-open (NO) relay contact.6 Alarm Relay Common7 Not Used8 Not Used9 Not Used10 Not UsedTerminal TB3 Name Description1 Building Alarm 1Input: Programmable UPS alarm, activated by a remote dry contact closure.2 Building Alarm 1 Return3 Building Alarm 2Input: Programmable UPS alarm, activated by a remote dry contact closure.4 Building Alarm 2 Return5 Building Alarm 3Default: Charger Off Input: Programmable UPS alarm, activated by a remote dry contact closure. Defaultfunction set for charger off.6 Building Alarm 3 Return7 Building Alarm 4Default: On Generator Input: Programmable UPS alarm, activated by a remote dry contact closure. Defaultfunction set for on generator.8 Building Alarm 4 Return9 Building Alarm 5Default: Maintenance Bypass Input: Programmable UPS alarm, activated by a remote dry contact closure. Defaultfunction set for maintenance bypass.10 Building Alarm 5 ReturnNOTE “Return“ indicates connection to electronics circuit ground. “Common” indicates connection to common side of isolated relay contact.
