Tripp-Lite SmartPro 3U Manual De Operación página 5

Connection
Your UPS will function properly without these connections.
1
DB9 Port Connection
Using the DB9 cable provided, connect a DB9 port on your computer
to a DB9 port on your UPS. On the computer, install the Tripp Lite
power protection software appropriate to its operating system. A
second computer with a DB9 port may be connected to the second
DB9 port if desired.
2
USB Port Connection
Using the USB cable provided, connect a USB port from a computer
to a USB port on your UPS. On the computer, install the Tripp Lite
power protection software appropriate to its operating system. A
second USB computer may be connected to the second USB port if
desired.
3
EPO Port Connection
Using the RJ11 cable provided, connect the Emergency Power
Off (EPO) port of your UPS to a user-supplied normally closed
or normally open switch according to the circuit diagram below.
The EPO port is not a phone line surge suppressor; do not connect
a phone line to this port.
(Optional)
1
2
3
(UPS will turn off if EPO cord is cut or EPO plug is disconnected)
5 5
4-5
EPO Circuit Diagrams