Tripp Lite PDUMH20ATNET - Manual (Page 11)

11
After installing the PDU and connecting
equipment, you may test the Automatic Transfer
Switch function by temporarily shutting down the
UPS system connected to the Primary AC input.
When the Primary input UPS is no longer
supplying AC power, the PDU will switch from
the Primary input to the Secondary input, and the
Secondary input LED will illuminate. When the
Primary input UPS has been restarted and resumes
supplying AC power, the PDU will switch back to
the Primary input.
Note: The primary and secondary inputs must be connected to
separate sources of utility power. The automatic transfer switch
function will be compromised if the primary and secondary inputs
are connected to the same utility power source. Do not perform a
test with equipment that must remain in productive operation. Any
test procedure must prepare for the contingency that the equipment
may lose power. Do not test the PDU by detaching power cords
which are connected to live power sources, as this eliminates the
connection to ground and places your equipment at risk.
Primary Input Active Secondary Input Active
The PDU provides remote monitoring A , outlet
control B and more via Web browser, telnet and
SNMP-based Network Management Systems.
For more information about configuration and
operation of the PDU via the PowerAlert Web
browser interface, refer to the SNMPWEBCARD
User's Guide, included on the CD-ROM bundled
with the PDU.
B
4.2 Remote Monitoring and Control
4. Configuration and Operation
(continued)
4.1 Automatic Transfer Switch (continued)
4.1.3 Quick Test
A
English.indd 11 1/16/2009 4:37:26 PM