APC 3000VA - Manual (Page 14)

12
S MART -UPS R EAR P ANEL
The rear panel has the input and output connectors, computer interface port, and default setting but-
tons for the low battery warning level and voltage sensitivity indicator.
120V Models 230V Models
B ASIC C ONNECTORS
Computer
Interface Port Power management software and interface kits can be used with
the UPS. Use only interface kits supplied or approved by APC.
If used, connect the interface cable to the 9-pin computer interface
port. Secure the connector 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 connec-
tor.
The UPS package contains a serial cable. Refer to the Software Installation In-
struction Sheet included with the UPS.
Rear Connector The UPS is shipped with the rear connector plug installed (as
shown in the images above for 120V and 230V units). The image
at the left shows the receptacle when the plug is removed.
To connect an optional external battery pack, this plug is removed
and replaced with the battery pack connector. Refer to the 3U
Rack Mount External Battery Pack User’s Manual for details.
120V Models
TVSS Screw The UPS features a transient voltage surge-suppression (TVSS)
screw for connecting the ground lead on surge suppression de-
vices, such as telephone and network line protectors.
D EFAULT S ETTINGS
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 con-
ditions, reduce the sensitivity setting to conserve battery capacity
and service life.