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5.3 Shutdown management with 2 NMC boards
Certain UPS can have 2 NMC boards in order to:
• Increase the number of protected servers,
• Protect 2 groups of server connected to different networks physically separated.
5.3.1 Shutdown Duration
As described in the 5.1.1.4 paragraph, The Network Shutdown Modules transmit their own "Shutdown duration" to the Network Management
Card. Based on these values (maximum Shutdown duration of all subscribed customer systems) that the card will send to the delayed
shutdown order to the UPS.
If the UPS have two NMC cards, the maximum shutdown duration of the two groups of protected systems will be used for the delayed
shutdown order.
Example: If the subscribed customers of the first NMC card have a maximum Shutdown duration of 60s and the ones of the second NMC
card of 120s, the servers shutdown will be launched 120s before the UPS shutoff..
5.3.2 Settings
Set-up shutdown parameters to the same values on the 2 cards is highly recommended (for the main output and the controlled outlets).
If the settings are not the same, the first criteria reached on one the 2 cards will launch the secure shutdown of all servers.
Please, note that in any case the shutdown of the protected servers will be executed safely.