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FXP1500-32G AC-DC Front-End
& FXR-3-32G Power Shelf Data Sheet
Controls and Indicators
Specification is valid for input voltage, load, and temperature ranges, unless otherwise stated.
Parameter
Type 1
Conditions/Description
LED indicators :
Visual Status
Indication
FP
2
?
?
?
DC OK (green)
AC OK (green)
Fan fail & Over-temperature (amber)
I C communication
I C communication
Three lines provide up to 8 separate PSU I C addresses
I C
I C
&I C
&I C
&I C
I C
I C
I C
Setting accuracy over I C: ± 50mV at V O1 nom, ± 150 mV over setting range
I C
speed can be set to full speed or automatic control via I C command.
&I C
1
2
bus
2
bus addressing
PS present pin
PS main output
remote shutdown
Power supply OK
DC current fail
AC fail / Power down
warning
DC fail / Output
voltage fault
Critical temperature
Warning/Fan Fail
DC voltage monitoring
DC current monitoring
Active current share
interconnect
V O1 presets
V O1 voltage trimming
(margining)
Fan speed control
Fan OK/FAIL
Synchronized startup
pin
Abbreviations used:
OC[S1, S2]
OC[T1-T3]
OC[U3]
OC[R1]
FP
2
2
OC[U2]
2
OC[U4]
2
OC[U1]
2
2
2
OC[R4]
OC[T4,T5]
2
2
OC[U1]
2
OC[R5]
? Monitors alarm functions and allows control of specific parameters.
? Uses standard Philips two wire bus (SCL and SDA signal lines)
2
? Used by system to indicate a PSU is installed in a system shelf
? Contact closure to logic ground ( internal pull-down resistor of 1 k ? )
? TTL compatible signal, inhibited when open contact, high or at TTL logic “1”
? Signal referenced to logic return (LRTN)
Two position switch in series with OC signal (logical AND) allows local enable/disable; “0”
Position => PS disabled; “1” Position => PS Enabled
AC OK & DC OK & no overcurrent & no over-temperature & fans working
Reports over-current condition on main output, I O1
Provides a warning that the input power has failed at least 5 ms before the output falls out of
regulation (<90% V O1 set).
? Open collector signal with 20 mA pull-down capability, referenced to logic return (LRTN).
? AC fail will go high or open during power fail condition and will go low when input is
within the operating range.
? A Power Fail warning will turn off the front panel green AC OK LED.
Internal under-voltage and overvoltage supervision of V O1 .
? Open collector signal with 20 mA pull-down capability, referenced to logic return (LRTN).
? DC fail will go high or open if V o1 < 90% or V O1 > 110% of V O1 set, measured in front of
the ORing FETs.
? Green LED on the front panel indicates normal operation; LED will flash if in parallel
operation V O1 is OK, but the unit is disabled.
Indicates the PSU operating temperature has reached [T shut-down – 10K] Indicates if the unit is
in over-temperature shutdown.
? Open collector signal with 20 mA pull-down capability, referenced to logic return (LRTN).
? The OC-output will go low 100 ms before an over-temperature condition shuts down the
unit.
? An amber LED on the front panel indicates over-temperature or fan fail.
Monitors the main output voltage, V O1 , seen at the output connector
Accuracy is ±1% over setting range and temperature.
Monitors the output current I O1 : Accuracy ± 1% over the load range.
Line must be connected to all paralleled PSUs to allow active current share functionality
between units
Output voltage is preset per programming of T4, T5
? T4/T5 = LOW / LOW => V O1 =28VDC
? T4/T5 = LOW / HIGH = HIGH / LOW => V O1 =32VDC
? T4/T5 = HIGH / HIGH => V O1 =36VDC
Output voltage trimming Vo1: ± 2 VDC
2
Two fan speed levels automatically set depending on the internal temperature. The fan
2
Indicates if the cooling fans are operating or have failed.
Overcurrent signal which can be used for synchronous startup of units in parallel or to
recover from an overload condition.
? I C
=> Signal provided over I C communication system; detailed I C information is available from the specific model’s I C Manual
? OC[#] => Hardwired signal accessible at PSU output connector, with pin number reference
? FP => Provided by devices located on PSU Front panel
2 2 2 2
found on the Power-One web site.
2
See LED Function table for further details
BCD.00021 Rev.AA, 31-JAN -11
Page 5 of 16
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