Specifications

SURT Stack/Rack-Mount 12U 14000/18000 VA 200 Vac 15000/20000 VA 208/240 Vac 10
Emergency Power Off (EPO)
The system power can be disabled in an emergency by closing a switch connected to the EPO.
Wiring must be performed by a qualified electrician. Adhere to all local and national electrical codes.
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 an 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 terminal
located on rear panel
EPO connector
• 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.
su0158a