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UPS Network Management Card 2 User’s Guide32
Control Page
For UPS control actions, click Control on the left navigation menu of the UPS tab.
To configure a Management Card to be a member of a Synchronized Control Group, see
“Sync Control Page” on page 42.
• To initiate a control action for the UPS of this Management Card only, select No for Apply to
Sync Control Group?
• To initiate a control action for all members of a Synchronized Control Group to which this
Management Card belongs (if the option is allowed for Synchronized Control Groups), select Yes
for Apply to Sync Control Group?
Note: The option to apply an action to a Synchronized Control Group is displayed
only if the UPS supports Synchronized Control Groups and if its Management Card is
an active (enabled) group member.
Synchronized Control Group guidelines
• All UPSs in a Synchronized Control Group must be the same model.
• Synchronized Control Groups are supported for any Smart-UPS or Symmetra UPS with a card
slot that accepts a Management Card.
• In a Synchronized Control Group of Symmetra 3-phase UPSs, the shutdown mode (set at the
UPS) must be either Normal or Secure for each UPS.
The synchronization process
If you apply an action to a Synchronized Control Group, enabled members of the group behave as
follows:
• Each UPS receives the command regardless of output status (e.g., low battery).
• The action uses the delay periods (such as Shutdown Delay, Sleep Time, and Return Delay)
configured for the initiating UPS.
• When the action begins, a UPS that is unable to participate retains its present output status while
the other UPSs perform the action. If a UPS is already in an output state that the action requires
(e.g., a UPS is already off when the Reboot UPS action starts), that UPS logs an event, but
performs the rest of the action, if any.
• All participating UPSs synchronize their performance of the action (within a one-second time
period under ideal conditions for Smart-UPS, but sometimes longer, especially for Symmetra
UPSs).
• In reboot and sleep actions:
– Immediately before the initiating UPS begins waiting the time specified as Return Delay, by
default it waits up to 120 seconds (its configurable Power Synchronized Delay) for any UPS
that does not have input power to regain that power. Any UPS that fails to regain input power
during that delay does not participate in the synchronized restart, but waits until its own input
power returns before restarting.
– The LEDs on the front of the UPS do not sequence their lights as they do for a normal (not
synchronized) reboot or sleep action.
• UPS status and events are reported in the same way for synchronized actions as for actions on
individual UPSs.