APC Back UPS 1400 VA User Manual download pdf (Page 20)

Smart-UPS Rear Panel

MADE IN USA (WEST KINGSTON, RI)

SU1400RMX L3U

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Computer Interface Port

Power management software and interface kits can be used with this UPS. Use only interface kits

supplied or approved by APC. If used, connect the interface cable to the 9-pin computer inter-

face port on the back panel of the UPS. Secure the connector’s screws to complete the connection.

TVSS Screw

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. Refer to

Connect Power and Equipment to the UPS, page 10, for information.

Voltage Sensitivity

The UPS detects line voltage distortions such as spikes, notches, dips, and swells, as well as

distortions caused by operation with inexpensive fuel-powered generators. By default, the UPS

reacts to distortions by transferring to on-battery operation to protect the connected equipment.

Where power quality is poor, the UPS may frequently transfer to on-battery operation. If the

connected equipment can operate normally under such conditions, battery capacity and service life

may be conserved by reducing the sensitivity of the UPS.

To reduce UPS sensitivity, press the Sensitivity button on the rear panel. Use a pointed object

such as a pen to press the button. Press it once to set the UPS’s sensitivity to reduced. Press it

again to set the sensitivity to low. Press the button a third time to reset normal sensitivity. The

Sensitivity can also be changed through software.

normal

reduced

low

When the UPS is set to normal sensitivity, the LED is brightly lit.

When it is set to reduced sensitivity, the LED is dimly lit.

When it is set to low sensitivity, the LED is off.

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APC Back UPS 1400 VA User Manual Page 20