- Eaton UPS User's Guide

UPS ELECTRICAL INSTALLATION

Eaton 9170

UPS (3–18 kVA) User's Guide S 164201393 Rev E www.eaton.com/powerquality

8. If any external hardwired control signals are required (EPO or

Generator On), unscrew and remove the top rear cover of the

cabinet and locate the terminal block (see Figure 31).

C A U T I O N

EPO circuits are not isolated from line voltage, and wiring must be installed according to

local codes using conduit or suitable primary supply cables.

The Generator On signal is isolated from line voltage and can be

treated as NEC Class 2 wiring.

Use 14–20 AWG, 600V wire (UL) or 14–26 AWG, 300V wire (CSA)

for all input control signals.

Generator On

(normally open)

Signal

Common

Emergency Power-off (normally closed)

External Bypass *(short to common when active)

Generator Set

Plastic Cable Tie

Figure 31. Input Control Signal Wiring

9. Place the signal wires through the proper conduit or grommet

above the terminal block and attach to appropriate terminals.

Secure each connection by torquing terminal screws to a maximum

0.4 Nm (3.5 lb in). Provide strain relief for cables by installing plastic

cable ties.

NOTE Do not strain relieve EPO wiring with the same cable tie used for Generator On

wires.

10. Remove the jumper between terminals 5 and 6 only if you are

wiring from an EPO switch. (See “Changing Parameter Settings”

on page 83 for information about accessing menu 4 3 2 to view or

change the EPO switch type.)

11. When all connections have been made and checked, reinstall the

UPS cabinet rear covers using the original screws.