Electrical Installation
17
Avaya
t
RS9 UPS (9–18 kVA, 9-Slot Models) Site Preparation, Installation and Operator’s Manual
S
164201543 Rev A
8.
If any external hardwired control signals are required (EPO or
Generator On), unscrew and remove the top rear panel of the
cabinet and locate the terminal block (see Figure 11).
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)
Generator Set
Plastic Cable Tie
Figure 11. 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 3.5 in lb (0.4 Nm). 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 36 for information about accessing menu 4,
submenu 3, item 2 to view or change the EPO switch type.)
11.
When all connections have been made and checked, reinstall
the UPS cabinet rear panels using the original screws.
