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4.7 Installing interface connections
WARNING
Hazardous voltages are present near the user interface terminal area if the UPS is not totally
disconnected.
4.7.1 TB1, TB2, and TB3 connections (other than TB1 battery interface
connections)
NOTE
Interface 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 7: "UPS
operating instructions" for shutdown instructions.
2. Unfasten the front door latch and swing the door open (see Figure 4-2 on page 26).
3. Remove the door. Remove the retaining screw located inside the door at the bottom hinge pivot
point, then lift the door off. Retain the hardware for later use.
4. If installing interface wiring through the left interface entry conduit landing, proceed to Step 5;
otherwise, proceed to Step 7 .
5. If not already accomplished, remove one top screw and two bottom screws securing the UPS left
front panel (see Figure 4-2 on page 26). Lift the panel straight up to remove it from the panel
hanger bracket at the top of the cabinet.
6. Remove the screws securing the protective cover panel and remove the panel. Retain the
hardware for later use.
7 .
Terminal block TB3 is accessible on the left side of the X-Slot communication bay. To gain access to
terminal blocks TB1 and TB2 and the interface entry plates, loosen the screws securing the
protective cover panel and remove the panel. This panel is to the right of the X-Slot Communication
Bay (see Figure 4-8 on page 35).
8. Remove the UPS cabinet top interface entry plates to drill or punch holes (see Figure 4-4 on
page 30).
9. Reinstall the entry plates.
WARNING
Do not directly connect relay contacts to the mains related circuits. Reinforced insulation to the
mains is required.
10. To locate the appropriate terminals and review the wiring and termination requirements, see
Section 3.2.3 on page 20, Table 4-1 on page 38, and Figure 4-7 through Figure 4-10.
11. Route and connect the wiring.
12. If wiring TB1 battery interface connections, proceed to Section 4.7 .2; if wiring the X-Slot
connections only, proceed to Section 4.7 .3; otherwise, proceed to Step 10.
13. When all wiring is complete, reinstall the protective cover panel and secure with the cabinet
mounted screws.
14. Reinstall the front door and secure with the retained hardware.
1027212
Revision E
UPS 225 - 275 kVA/300kVAPF0.8
User's and Installation Guide
33
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