P-164000476 9395P 500kVA / 600 kVA 41Revision 002 User’s and Installation Guide4.7 Installing interface connectionsWARNINGHazardous voltages are present near the user interface terminal area if the UPS is not totallydisconnected.4.7.1 TB1, TB2, and TB3 connections (other than TB1 battery interfaceconnections)NOTEInterface wiring must be installed from the top of the UPS cabinet.To install wiring to connections:1. Verify the UPS system is turned off and all power sources are disconnected. See Chapter 17: “UPSoperating instructions” for shutdown instructions.2. If not already accomplished, remove one top screw and two bottom screws securing the UPS leftfront panel (see Figure 4-2 on page 32). Lift the panel straight up to remove it from the panelhanger bracket at the top of the cabinet.3. Remove one top screw and two bottom screws securing the UPS center front panel. Lift the panelstraight up to remove from the panel hanger bracket at the top of the cabinet.4. Terminal block TB3 is accessible on the left side of the X-Slot communication bay. To gain access toterminal blocks TB1 and TB2 and the interface entry plates, loosen the screws securing theprotective cover panel and remove the panel. This panel is to the right of the X-Slot CommunicationBay (see Figure 4-9 on page 43).5. Remove the UPS cabinet top interface entry plates to drill or punch holes (see Figure 4-4 onpage 36).6. Reinstall the entry plates.WARNINGDo not directly connect relay contacts to the mains related circuits. Reinforced insulation to themains is required.7. To locate the appropriate terminals and review the wiring and termination requirements, seeSection 3.2.3 on page 23, Table 4-1 on page 47, and Figure 4-8 through Figure 4-10.8. Route and connect the wiring.9. If wiring TB1 battery interface connections, proceed to Section 4.7.2; if wiring the X-Slotconnections only, proceed to Section 4.7.3; otherwise, proceed to Step 10.10. When all wiring is complete, reinstall the protective cover panel and secure with the cabinetmounted screws.11. Reinstall the left and center front panels removed in the previous steps and secure with theretained hardware.
