User Manual

UPS Network Management Card 3 User Guide33
Shutdown delays and PowerChute Network Shutdown.
The following section describes how the Low Battery Duration, Maximum Required Delay and Outlet Group
Power Off Delays impact the PowerChute shutdown sequence.
For more information on PowerChute shutdown sequences, see the PowerChute Network
Shutdown User Guide.
For both types of UPS, with and without Outlet Groups, the shutdown time is negotiated by the NMC
interacting with PowerChute Network Shutdown, as follows:
UPS without Outlet Groups
For a UPS with NO outlet groups, the UPS shutdown time is the greater of the Maximum Required Delay or
Low Battery Duration values on the NMC Shutdown screen, plus a non-configurable 2 minute delay, plus the
shutdown delay for the UPS.
Notes:
•If a shutdown has been triggered by a Low Battery condition, the Low Battery Duration value takes
precedence over Maximum Required Delay.
•As an exception, UPS models with the prefix SUM that have Outlet Groups use the UPS without
Outlet Groups method to calculate the UPS shutdown time.
UPS with Outlet Groups
For a UPS WITH outlet groups, the shutdown time is the Power Off Delay value on the NMC Outlet Groups
screen, see “Outlet Groups on Configuration menu”. (Not available with all UPS devices).
UPS without outlet groups -Shutdown time in minutes
Low Battery Duration or
Maximum Required Delay
Non-configurable
two minute delay
UPS
Shutdown
Delay
UPS Off
UPS turn off starts
Outlet Group Power Off Delay
(NMC Outlet Groups screen)
UPS with Outlet Groups - shutdown time in minutes
Outlet Group turn off
starts
Outlet Group off