HPR3-00 Emerson Network Power, HPR3-00 Datasheet - Page 7

• Manufacturer Part Number: HPR3-00
• Description: Linear & Switching Power Supplies 1000 - 6000 W 19" Rack 3U 4 Slots (NOT for HPS3KW)
• Manufacturer: Emerson Network Power

PWOK# (Power Good)
Power Supply Present Indicator (PRESENT#)
AC INPUT Present Indicator (ACOK#)
PWOK# is a power good signal and will be pulled LOW by the power supply to indicate that both the
outputs are above the regulation limits of the power supply. When any output voltage falls below
regulation limits or when AC power has been removed for a time sufficiently long so that power supply
operation is no longer guaranteed, PWOK will be de-asserted to a HIGH state. The start of the PWOK#
delay time shall be inhibited as long as the 48 V output is in current limit or the 5 Vsb output is below
the regulation limit.
The PRESENT# signal is primarily used to provide a mechanism by which the host system can sense the
number of power supplies physically present (operational or not). This pin is connected to ground in the
power supply.
The AC OK# signal is used to indicate presence of AC input to the power supply. This signal shall be
connected to 5 Vsb through a resistor on the host system side. A logic “Low” level on this signal shall
indicate AC input to the power supply is present. A Logic “High” on this signal shall indicate a loss of AC
input to the power supply.
PSON# Signal Characteristic
Signal Type
PWOK = High
PWOK = LOW
Logic level low voltage, Isink=4mA
Logic level high voltage, Isource=200µA
Sink current, PWOK = low
Source current, PWOK = high
PWOK delay: T
PWOK rise and fall time
Power down delay: T
Signal Type
PRESENT# = Low
PRESENT# = High
Logic level low voltage, Ising=4mA
Logic level high voltage, Isink=50µA
Sink current, PRESENT# = Low
Source current, PRESENT# = High
pwok on
pwok off
ACOK# Signal Characteristics
Table 12
supply. Pullup to 5 Vsb external to the power
Pull-up to 5 Vsb through a resistor in the host
Open collector/drain output from power
100 msec
1 msec
2.0 V
2.0 V
MIN
MIN
0 V
0 V
Not present
Present
supply.
system.
OFF
ON
1000 msec
1000 msec
100 µsec
4.80 V
4.80 V
0.8 V
4 mA
2 mA
50 µA
MAX
0.8 V
4 mA
MAX
Embedded Power for
Business-Critical Continuity
Rev. 02.22.11_81
HPS3000 Series
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