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Output Circuit Breakers Switches (Select Models Only): These
resettable circuit breakers protect your UPS from output overload. If
one or both breakers trip, remove some of the load on the circuit(s)
and allow the UPS to cool before pressing the breaker switch(es) in to
reset.
Input Cord (Select Models Only): This permanently attached power
cord connects your UPS to a power outlet.
AC Receptacles (Varied by Model): These 15-, 20- and 30-amp
receptacles provide your connected equipment with pure sine-wave
AC output from the AC line during normal operation and from battery
power during blackouts and severe brownouts. Power provided at
these outlets is filtered to protect connected equipment against
damaging surges and line noise. The receptacles are divided into
numbered load banks, as labelled on the unit. Using PowerAlert
software and cabling, load banks one and two may be individually
turned off and on from a remote location, allowing users to reset or
reboot connected equipment. See Serial Port Connection under
Optional Connections.
“SMART” DB9 Port: Your UPS’s DB9 port can be used to monitor
and control your UPS using either RS-232 or dry contact protocols. It
can also be used to connect an emergency power off (EPO) switch.
RS-232 communications are very complex, but are easy to
implement. The easiest way monitor and control the UPS using RS-
232 is to connect the UPS to a computer with a DB9 cable and install
Tripp Lite’s PowerAlert software on the connected computer.
Dry contact communications are simple, but some knowledge of
electronics is necessary to configure them. The DB9 port’s pin
assignments are shown in the diagram at the left. If the UPS battery is
low, the UPS sends a signal by bridging pin 1 and pin 5. If utility
power fails, the UPS sends a signal by bridging pin 8 and pin 5. To
shut the UPS down remotely, send a 5V to 12V signal on pin 3 (using
pin 5 as the (negative) ground) for at least 3.8 seconds.
You may connect your UPS to an EPO switch and a computer at once
using a Tripp Lite EPO cable (not included; order accessory #73-0901
from Tripp Lite). Follow the connection procedures included with the
EPO Cable.
NEMA 5-15R
NEMA 5-15/20R
Other outlet types not shown
Communications
9
Basic Operation
(continued)
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