FNP600/850/1000 AC-DC Front-Ends
& FNR-5-12G/FNR-5-48G Power Shelves Data Sheet
Control and Monitoring
DC OK
Parameter
Conditions/Description
TTL open-collector signal with active
Min.
90
Nom.
Max.
110
Units
%
front panel indicates normal operation.
resistor. Note.
20-mA pull-down. Represents percent
of output voltage where signal is OK.
Below this voltage, a signal high
condition indicates an output which is
out of tolerance. Green DC OK LED on
1
Internally pulled up to 5V with a 5.1 k ?
2
Input Power Fail Warning
TTL open-collector signal with active
5
ms
loss of input power. Internally pulled
up to 5V with a 5.1 k ? resistor. Note.
20-mA pull-down. High indicates an
input power fail. Power Fail Warning
will turn OFF green AC OK LED.
Represents the time after warning
signal before Vout drops to 95% due to
1
2
if power supply is present.
Also available on I C data line.
Resistance of connection to logic
Power Supply Present
ground which allows user to determine
1
Signal
Main output only. Difference in current
between two supplies at >10% load
Current Share
value.
FNP600-12:
FNP850-12:
FNP600-48:
FNP1000-48:
Total voltage compensation for cable
Remote Sense
losses with respect to the main output.
Open circuit or logic high from ENA pin
Output Enable
to Vo1 RTN shuts OFF Vo1; Vaux and
fan are operational. Logic low (2 mA
sink capability) or jumper will turn ON
Vo1 within 500 ms. Open circuit
voltage on enable pin is 3.3 VDC.
Externally applied voltage to the enable
pin should NOT exceed 7 VDC. Signal
is referred to as Logic Return (LRTN).
1
2
2
A pull-up to 3.3V can be achieved by terminating the logic signal with a 10 k ? resistor to logic ground.
I 2 C Bus Management Interface
10
5
7
2
2
0.5
?
A
V
Static
Status
(Logic 1 or 0)
Real-Time Monitoring
Control Signals
Includes static information such as: part number and revision level, output rating, serial number, date code,
and manufacturing location.
Power Supply OK.
AC Input OK.
DC Output OK.
Power Supply Seated.
Overtemperature.
Overcurrent.
Fan OK.
Output voltage (main output) 0.1V LSD.
Output current (main output) 0.1A LSD.
Time in service.
Enable for main output.
Output voltage to: (0.01V resolution on 12V supplies;
0.05V resolution on all 48V supplies).
Fan speed level.
BCD20034-G Rev. AD, 11-May-10
Page 4 of 15
www.power-one.com
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