4
Basic Connectors
Serial
Port
USB
Port
TVSS
Screw
Use only interface kits approved by APC.
Use only the supplied cable to connect to the Serial Port. A
standard serial interface cable is incompatible with the UPS.
Serial and USB Ports cannot be used simultaneously.
The UPS features a transient voltage surge-suppression (TVSS)
screw for connecting the ground lead on surge suppression
devices such as telephone and network line protectors.
Prior to connecting grounding cable, disconnect the UPS from
utility power.
Emergency Power Off
The Emergency Power Off (EPO) feature is user configurable. EPO provides immediate de-
energizing of connected equipment from a remote location, without switching to battery operation.
1. Use the EPO connector supplied with the UPS.
2. Use a normally-open contact to connect the +24 terminal to the IN terminal, (see diagram).
3. Wire the four-pin connector to the EPO system.
EPO Port
(located on rear panel)
EPO Connector
The EPO interface is a Safety Extra Low Voltage (SELV) circuit. Connect it only to other SELV
circuits. The EPO interface monitors circuits that have no determined voltage potential. Such closure
circuits may be provided by a switch or relay properly isolated from the utility. To avoid damage to
the UPS, do not connect the EPO interface to any circuit other than a closure type circuit.
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).
+24
IN