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Basic Operation
(continued)
8
“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 switch.
RS-232 communications are very complex but are easy to implement.
The easiest way to 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.
Communications
The UPS’s control panel lights will turn on in the sequences below to signal that the UPS is
having operational difficulties.
Lights (On/Flashing) and Condition Solution
On: REPLACE BATT Let the UPS system charge for at least
Condition: Replace Battery 12 hours and perform a self test using
the "ON/Test Switch" as described on
page 5. If the light continues to stay on,
contact Tripp Lite for service.
On: BATT LOW, ON BATT Prepare for imminent UPS shutdown.
Condition: Battery Low
On: BYPASS, LINE, LOAD, OVERLOAD Reduce the load the UPS supports.
Condition: On Bypass due to Overload
On: FAULT Remove the cause of the short circuit
Condition: Short Circuit from the UPS output.
Flashing: FAULT Check the utility line for wiring problems
Condition: Wiring Fault such as reversed line and neutral or a
missing ground.
On: FAULT, REPLACE BATT Restart the UPS. If the problem persists,
Condition: Battery Voltage too High contact Tripp Lite for repairs.
On: FAULT, REPLACE BATT, OVERLOAD Restart the UPS. If the problem persists,
Condition: EEPROM Error contact Tripp Lite for repairs.
On: FAULT, BYPASS, LINE, 100% Restart the UPS. If the problem persists,
Condition: On Bypass due to contact Tripp Lite for repairs.
High Output Voltage
On: FAULT, BYPASS, LINE, 75% Restart the UPS. If the problem persists,
Condition: On Bypass due to contact Tripp Lite for repairs.
Low Output Voltage
On: FAULT, BYPASS, LINE, 50% Restart the UPS. If the problem persists,
Condition: On Bypass due to High contact Tripp Lite for repairs.
Bus Voltage
On: FAULT, BYPASS, LINE, 25% Restart the UPS. If the problem persists,
Condition: On Bypass due to Low contact Tripp Lite for repairs.
Bus Voltage
Troubleshooting
Rear Panel
continued
Accessory Slot: Remove the small cover panel from this slot to use
optional accessories to remotely monitor and control your UPS.
Contact Tripp Lite Customer Support at (773) 869-1234 for more
information, including a list of available SNMP, network management
and connectivity products.
TVSS Cover Plate: Remove this plate to install optional modem/network
surge protection modules, available for purchase by special arrangement
with Tripp Lite.
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