User`s guide

®
USER’S GUIDE
Network Management Card
31
Synchronized Control Group guidelines
The following guidelines apply to Synchronized Control Groups:
• 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 Network 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 Synchronization 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).
To configure a Management Card to be a member of a Synchronized Control
Group, see The Sync Control Option.