American Power Conversion 100 VAC - Manual (Page 16)

990-7096 Rev. 2 12
Rear Panel
The rear panel has the input and output connectors, computer interface port, and manual settings
for the low battery warning level and voltage sensitivity indicator.
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M AD E I N U S A (W ES T K IN GS TON , R I )
S U 1400R M2U
X X01234 56789
Computer Interface Port
Optional 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.
Use an APC supplied cable to connect to the Computer Interface Port. DO NOT
use a standard serial interface cable since it is incompatible with the UPS
connector.
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 7, 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. In
areas where power quality is poor, the UPS may frequently transfer to on-battery operation. If the
connected equipment can operate normally under such conditions, reduce the sensitivity setting to
conserve battery capacity and service life.
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
Normal: When the UPS is set to normal sensitivity, the LED is brightly lit.
Reduced: When it is set to reduced sensitivity, the LED is dimly lit.
Low: When it is set to low sensitivity, the LED is off.