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UPS 225 - 275 kVA
User’s and Installation Guide
1027212
Revision B
36
1. Securely mount the remote EPO switch. Recommended locations include operator’s
consoles or near exit doors. See Figure 2-7 for enclosure dimensions and wiring knockouts.
2. Verify the UPS system is turned off and all power sources are removed. See Chapter 5,
“UPS operating instructions” for shutdown instructions.
3. Remove one top screw and two bottom screws securing the UPS center front panel (see
Figure 3-1). Lift the panel straight up to remove from the panel hanger bracket at the top of
the cabinet.
Figure 3-12. Remote EPO switch
4. To gain access to terminal blocks TB1 and TB2 and the interface entry plates, loosen the
screws securing the small top internal safety shield panel and remove the panel. This panel
is to the right of the X-Slot communication bays (see Figure 3-7 on page 30).
5. Remove the UPS cabinet interface entry plates to drill or punch holes (see Figure 3-3 on
page 26).
6. Reinstall the interface entry plates.
7. To locate the appropriate terminals and review the wiring and termination requirements,
see paragraph 2.2.2 on page 14, Table 3-1, and Figure 3-7 through Figure 3-9.
8. Route and connect the wiring as shown in Table 3-2 and Figure 3-13.
9. If the normally-closed Remote EPO TB1 connection in the UPS is not used, connect a jumper
wire between pins 1 and 2 on TB1.
From remote EPO switch
To customer interface
Terminal board TB1 in UPS cabinet
Remarks
TB1-4 TB-3
Twisted wires (2)
2.5mm
2
0.75mm
2
TB1-5 TB-4
Table 3-2. Remote EPO wire terminations