7 Communication Interfaces
Note: The UPS can still function properly without making the connections below.
The UPS's communication interfaces include an RS-232 port, a USB port, an accessory slot and an EPO/ROO port. Refer to
section 2.3 Rear Panels for their locations.
RS-232 Port
These ports connect your UPS to any workstation or server. Use with Tripp Lite's PowerAlert
cable to enable your computer to automatically save open files and shut down equipment during a blackout. Also, use the
PowerAlert Software to monitor a wide variety of AC line power and UPS operating conditions. Consult your PowerAlert Software
manual or contact Tripp Lite Customer Support for more information. See "USB and RS-232 Serial Communications" in the
"Optional Connections" section for installation instructions.
Dry contact communications are relatively straighforward, but some knowledge of electronics is necessary for configuration.
The DB9 port's pin assignments are shown in the diagram above.
• If the UPS battery is low, the UPS sends a signal by bridging pins 8 and 5.
• If utility power fails, the UPS sends a signal by bridging pins 1 and 5.
To remotely shut down the UPS, short pin 3 and 9 for at least 3.8 seconds.
USB Port
The USB port provides another channel for the user to record UPS power events, monitor UPS status, adjust transfer voltage,
set up alarms and shut down the UPS safely via computer. Simply plug the USB cable into the UPS and your computer, install
the software and follow the prompts on your screen to complete the software installation.
Accessory Slot
You can choose optional cards to monitor the UPS or to enhance the UPS function. The list of optional cards is shown in the
table below.
Optional Card
WEBCARDLX
Note: For more information about optional cards or to purchase an optional card, contact your local dealer or Tripp Lite customer service.
Figure 7-1: RS-232 Port
Function
Remotely monitors and controls the status of the UPS via network
system.
25
Software and included RS-232
®