39UPS Network Management Card 2 User’s Guide
Controlled Early Shutdown. These options are not available with all UPS devices. They enable you to shut
down a UPS device that is on battery, when 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.
• When the load on the UPS output is less than a set percentage.
If you enable these conditions, the UPS is shut down when any of the conditions is met.
You can also decide whether the UPS turns back on, or not, after AC utility power is restored.
We recommend that you don’t use these options with software controlling your server shutdowns. For
example, you could select Ignore PCNS shutdown commands under On-Battery Shutdown Behavior
(lower on this screen). Doing this means that the NMC determines the on-battery shutdown behavior for the
UPS, not PowerChute Network Shutdown.
Shutdown delays and forcing negotiations. A shutdown time for the UPS is calculated differently for a
UPS device without outlet groups compared to a UPS with outlet groups.
1. For a UPS without outlet groups, the shutdown time is the Maximum Required Delay value on t he NMC
shutdown screen plus 2 minutes plus the shutdown delay for the UPS.
2. For a UPS with outlet groups, the shutdown time is the Power Off Delay value on the NMC outlet
groups screen. (This option is not available with all UPS devices).
Note that devices wth the prefix SUM behave like #1 above, not #2.
For both types of UPS, the shutdown time is negotiated by the NMC interacting with PowerChute Network
Shutdown (PCNS).
UPS without outlet groups: shutdown time
UPS shutdown time Max. Required Delay
(NMC shutdown screen)
2 min UPS shutdown delay
UPS WITH outlet groups: shutdown time
UPS shutdown time Power Off Delay
(NMC outlet groups screen)