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Configuring the Interface Expander
continued
Until Low
Battery
shutdown mode
Until Low Battery shutdown mode is similar to the standard
operation of the
UPS
. During a utility failure, the Interface
Expander allows the
UPS
to run on battery until utility
power is restored, or until the battery is exhausted. If the
Interface Expander detects a
UPS
Low Battery condition, it
sends a Low Battery signal on all ports for a period of time
equal to the Low Battery Signal Time and then shuts down
the
UPS
.
If utility power returns after the Low Battery timer has
begun, the Interface Expander will continue the countdown
and force the UPS to cycle power.
This mode is useful for applications which require maxi-
mum run time.
Timer shutdown
mode
In Timer shutdown mode, the Interface Expander allows the
UPS to operate on battery for a user-specified length of time
before shutting down the
UPS
. See “DIP switches: Table 5”
on page 19 for the available timer settings.
If power returns before the timer has run out, the Interface
Expander returns to On Line status. When the timer runs out
or when the Interface Expander detects a Low Battery con-
dition in the
UPS
, the Interface Expander sends a Low
Battery signal for a period of time equal to the Low battery
signal time and then shuts down the
UPS
.
Note
: If you are using PowerChute software, set the shut-
down delay for a time longer than the Interface
Expander timer setting. Otherwise, if the power
returns after the server shuts down, the server may
not restart. To set the shutdown delay, go to
Configu-
ration
|
Event Actions
and select UPS On Battery
from the Event list and Shut Down Server in the
Action box. Click
Options
and enter a setting for
Begin Shutdown Sequence in __ Seconds. Click
OK
.
Continued on next page