13Smart-UPS SRC 5000/6000/8000/10000 VA
Emergency Power Off
The Emergency Power Off (EPO) option is a safety feature that will immediately shut off power to all
connected equipment. When the EPO button is pushed, all connected equipment will immediately turn
off and will not switch to battery power.
Wiring must be performed by a qualified electrician.
Adhere to all national and local electrical codes when wiring the EPO.
The switch should be connected in a normally open switch contact. External voltage is not required; the
switch is driven by 24 V internal supply. In closed condition, 4 mA of current are drawn.
The EPO switch is internally powered by the UPS for use with non-powered switch circuit breakers.
The EPO circuit is considered a Class 2 circuit, (UL, CSA standards) and a SELV circuit (IEC standard).
Both Class 2 and SELV circuits must be isolated from all primary circuitry. Do not connect any circuit to the EPO
terminal block unless it can be confirmed that the circuit is Class 2 or SELV. If circuit standard cannot be
confirmed, use a contact closure switch.
Use one of the following cable types to connect the UPS to the EPO switch.
• CL2: Class 2 cable for general use.
• CL2P: Plenum cable for use in ducts, plenums, and other spaces used for environmental air.
• CL2R: Riser cable for use in a vertical run in a floor-to-floor shaft.
• CLEX: Limited use cable for use in dwellings and for use in raceways.
• For installation in Canada: Use only CSA certified, type ELC, (extra-low voltage control cable).
• For installation in other countries: Use standard low-voltage cable in accordance with national and
local regulations.
EPO connector
located on the UPS rear panel
• Strip insulation from one end of each wire to be used
for connecting EPO.
• Insert screwdriver into the slot above terminal to be
wired. Insert stripped wire into terminal. Remove
screwdriver to secure wire in terminal. Repeat for
each terminal.
Use only approved components when configuring the external EPO.
su0158a
L N PE L N PE
UPS
L
N
PE
input
PE
output
L
N
external
EPO
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