User`s guide

–18–
How MasterSwitchplus Works
Graceful Shutdown Sequence for On-battery Events
Low Battery Warning Control†
Never On Runtime Remaining
Is there a cable connected to the Basic Port?
No Yes
Device Confirm†
Ye s N o
Power On Delay†
Remain Off Delay
Outlet is on
UPS indicates AC power failure
Programmed Delay
UPS Runtime Remaining falls below UPS Low Battery
Warning Threshold x UPS Low Battery Multiplier†
Programmed
Delay Expires
UPS battery is
exhausted
UPS indicates AC
power restored or
Cancel command is
issued
Outlet is
turned off
Server confirms shutdown
Power Off Delay
†
expires
Outlet is turned off
UPS is operating on AC power
UPS exceeds Battery Capacity Threshold†
or
Battery Capacity Threshold Override command is issued
MasterSwitchplus Asserts
AC
Fail Signal
MasterSwitchplus
Asserts Low
Battery Signal
Unit Property‡
Outlet Property†
This diagram sequences the events
that an outlet set to Graceful Shutdown
will follow when your UPS goes on
battery. The sequence is an
unattended operation that requires you
to choose values for the following
properties:
• Low Battery Warning Control
• UPS Low Battery Multiplier
• Device Confirm
• Power Off Delay
• Battery Capacity Threshold
• Power On Delay
Outlet
remains off
Youissuea
Cancel
command
Power On
Delay†
expires
Outlet is
turned on
Shutdown
Restart