Eaton 93PM Integrated Accessory Cabinet-Tie (50 kW and 100 kW IAC-T) Installation and Operation Manual P-164000371—Rev 05 63Table 20. IAC-T MOB, MBP, and Pull Chain Interface Terminals (Continued)IAC-TTerminal Name UPS Terminal DescriptionTB1-13 MOB 3 Aux #1 NC UPS 3 Building Alarm Output: Normally Closed (NC) contact used to indicatewhether MOB 3 is open. Contacts are closed when MOB 3is open.TB1-14 MOB 3 Aux #1COM UPS 3 Building Alarm ReturnTB1-15 MOB 3 Aux #2 NO UPS 3 Pull Chain – Terminal1Output: UPS 3 Pull Chain – Backup control for paralleloperationTB1-16 Pull ChainCommonUPS 3 Pull Chain Return –Terminal 2 Output: UPS 3 Pull Chain CommonTB1-17 MOB 4 Aux #1 NC UPS 4 Building Alarm Output: Normally Closed (NC) contact used to indicatewhether MOB 4 is open. Contacts are closed when MOB 4is open.TB1-18 MOB 4 Aux #1COM UPS 4 Building Alarm ReturnTB1-19 MOB 4 Aux #2 NO UPS 4 Pull Chain – Terminal1Output: UPS 4 Pull Chain – Backup control for paralleloperationTB1-20 Pull ChainCommonUPS 4 Pull Chain Return –Terminal 2 Output: UPS 4 Pull Chain CommonTB2-1 MBP Aux 1 COM UPS 1 MBP Output: Normally Open (NO) contact used to indicatewhether the MBP is closed and the UPS system is onmaintenance bypass. Contacts are closed when the MBP isclosed.TB2-3 MBP Aux 1 NC UPS 1 MBP ReturnTB2-2 MBP Aux 2 COM UPS 2 MBP Output: Normally Open (NO) contact used to indicatewhether the MBP is closed and the UPS system is onmaintenance bypass. Contacts are closed when the MBP isclosed.TB2-4 MBP Aux 2 NC UPS 2 MBP ReturnTB2-5 MBP Aux 3 COM UPS 3 MBP Output: Normally Open (NO) contact used to indicatewhether the MBP is closed and the UPS system is onmaintenance bypass. Contacts are closed when the MBP isclosed.TB2-6 MBP Aux 3 NC UPS 3 MBP ReturnTB2-7 MBP Aux 4 COM UPS 4 MBP Output: Normally Open (NO) contact used to indicatewhether the MBP is closed and the UPS system is onmaintenance bypass. Contacts are closed when the MBP isclosed.TB2-8 MBP Aux 4 NC UPS 4 MBP ReturnNOTEUPS building alarm signals are customer programmable. Customer interface wiring for the IAC-T MOBs assumes that theUPS Building Alarm is programmed to monitor Normally Closed (NC) contacts.Any pair of unused UPS building alarm terminals may be used for the MOB and MBP interface connections.“Return“ indicates connection to electronics circuit ground. “Common” indicates connection to common side of isolatedrelay contactInstallation