42
UPS 225 - 275 kVA/300kVAPF0.8
1027212
User’s and Installation Guide
Revision E
Table 4-2: Remote EPO wire terminations
Figure 4-14. Normally-open remote EPO switch wiring
NOTE
Remote EPO switch rating is 24 Vdc, 1 A minimum.
Remote EPO normally-open and normally-closed return terminals are separated on the terminal
board, but are connected together.
14. If you are installing multiple remote EPO switches, wire additional switches in parallel with the first
remote EPO.
15. If required, install wiring from the remote EPO switch to the trip circuitry of the upstream
protective devices. A normally-open (NO) contact is provided between terminals 6 and 7 of the
remote EPO switch (where applicable), as shown in Figure 4-13. Remote EPO switch wiring must
be in accordance with electrical code requirements.
16. When all wiring is complete, reinstall the protective cover panel and secure with the cabinet
mounted screws.
17. Reinstall the front door and secure with the retained hardware.
18. Close the door and secure the latch.
19. If removed, reinstall the protective cover panel removed in Step 7. Secure with the retained
hardware.
20. If removed, reinstall the left front panel removed in Step 6 and secure with the retained hardware.
Figure 4-15 and Figure 4-16 show alternative methods of connecting a remote EPO switch if using
another manufacturer’s switch.
From remote EPO switch
To customer interface
Terminal board TB1 in UPS cabinet
Remarks
TB1-4
TB1-3
Twisted wires (2)
0.75mm
2
2.5mm
2
TB1-5
TB1-4
