APC MasterSwitch User's Guide download pdf (Page 26)

®®

USER’S GUIDE

masterswitch plus

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 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†

Battery Capacity Threshold Override command is issued

MasterSwitch Plus Asserts AC Fail Signal

MasterSwitch Plus

Asserts Low

Battery Signal

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

Shutdown

Restart

Outlet

remains off

You issue a

Cancel

command

Power On

Delay†

expires

Outlet is

turned on

Programmed

Delay Expires

UPS runtime remaining falls below UPS Low

BatteryWarning Threshold x Low Battery Multiplier

†

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APC MasterSwitch User's Guide Page 26

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