When a PDU is powered on for the rst time, all the relays are off, and the power-on sequencing is not
used. You must turn on the relays by using the web interface or SNMP. You must also set the values for
the GlobalDelayTimer and IndividualDelayTimer, if they are used. After that, when the PDU is turned on
(or power is restored), the outlet power-on sequence and behavior are controlled by the following
settings:
• Previous state of the outlets (on or off)
• GlobalDelayTimer value
• IndividualDelayTimer value
The outlets that were off before the PDU was turned off (or lost power) will stay off after power is
restored.
The outlets that were on before the PDU was turned off (or lost power) will be tuned back on in a
sequence that is determined by the timers. If the timer values are zero, the only delay is the PDU boot-up
time, which is 10 seconds. If there are values in the delay timers, the turn on time is the sum of following
three values:
• PDU boot-up time (10 seconds)
• GlobalDelayTimer value
• IndividualDelayTimer value
The following example shows what you can expect to see if power to the PDU is restored after a power
outage.
• PDU boot-up time = 10 seconds
• GlobalDelayTimer = 5 seconds
• The previous outlet state for the PDU is:
Outlet 1 On
Outlet 2 On
Outlet 3 On
Outlet 4 Off
Outlet 5 On
Outlet 6 On
Outlet 7 On
Outlet 8 On
Outlet 9 On
Outlet 10 Off
Outlet 11 On
Outlet 12 Off
• The IndividualDelayTimer for each outlet has the following settings:
Outlet 1 1 Sec
Outlet 2 2 Sec
Outlet 3 3 Sec
Outlet 4 5 Sec
Outlet 5 2 Sec
Outlet 6 2 Sec
Outlet 7 4 Sec
Outlet 8 1 Sec
Outlet 9 2 Sec
Outlet 10 2 Sec
Outlet 11 5 Sec
Outlet 12 3 Sec
The following table shows the PDU outlet power-on timing when power is restored after a power outage.
Racks and rack features
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