User`s guide

21UPS Network Management Card 2 User’s Guide
The way outlet groups turn on and off depends on their configuration and how you turn the UPS on or off:
• Before you configure the delays for actions when you turn on the UPS output (described in “UPS on
Control menu” and “Sequencing settings”), any outlet group that is off turns on by default. When an
outlet turns on, it applies power to all devices attached.
• After you configure the actions and delays, they control when outlet groups turn on and off after you
turn the UPS on or off. (This is the case whether you turn off using the web UI of the NMC or the
display interface at the UPS).
Configuring your Outlet Groups
Outlet group name and type. View the name, type, and delays of your UPS outlets on the Configuration -
Outlet Groups screen. Click the name of an outlet group under Group to change its settings including
sequencing delays and load shedding options.
Sequencing settings. Settings vary by UPS device. Use the sequencing options to define how the UPS will
respond to user-issued commands.
Load-shedding options. Load shedding enables you to specify conditions that cause individual Switched
Outlet Groups to lose power. It is not available for Main Outlet Groups.
An example of using load shedding would be for turning off non-critical loads like monitors when the UPS is
running on battery or is overloaded. This would preserve the battery charge and the runtime for essential loads.
Another example would be to disable an automatic restart after an overload in order to investigate the cause of
the overload before turning the outlet group back on.
The options enable you to shut down an outlet group when ANY of the conditions that you specify are met:
• When the time on battery exceeds a set number of minutes.
• When the runtime remaining of the UPS is less than a set number of minutes. (Runtime is how long the
UPS can use battery power to support its present load).
• The UPS is overloaded (the power demand of the devices connected to the UPS exceeds the amount of
power the UPS can provide).
You can also enable these actions:
• Skip outlet off delay. (Turn the outlet group off immediately, without waiting the number of seconds
configured as Power Off Delay. By default, this option is disabled.)
• Stay off after power returns. (Remain off when AC utility power returns. By default, this option is
disabled, and the UPS waits the number of seconds configured as Power On Delay, then turns on the
outlet groups.)
Field Description
Power Off Delay
When this outlet group is on, it waits this delay in seconds before turning off. By setting
different times here for outlets, you can sequence their turn-offs, that is, you can specify the
order in which they turn off.
Reboot Duration The outlet waits this amount of time before rebooting.
Power On Delay
When this outlet group is off and receives a signal to turn on, it waits this delay in seconds
before turning on. By setting different times here for outlets, you can sequence their turn-ons.
Min Return
Runtime
The minimum amount of time the UPS must be able to support the load before it can turn on
again.