MCD10074 Rev. 1.2, 15-Apr-10 Page 1 of 17 www.power-one.com
FNP1500/1800 Front-Ends
& FNR-3 Power Shelves Data Sheet
Features
RoHS compliant for all six substances
High density front-ends 15.2 to 18.3 W/in3
Wide input voltage range 85 to 264 VAC
12 V standby voltage, 1A per front-end
Highly efficient topology reduces operating costs
I2C interface status and control
I2C voltage and current limit setting
Analog output voltage setting
Overtemperature, output overvoltage, and output
overcurrent protection
ORing circuits for true redundant operation:
V
o1: ORing FETs; Vo2: ORing Diodes
Status LEDs: AC OK, DC OK, and
Fan Fail/Overtemperature Fail
Applications
Telecommunications
Data communications
Servers
Distributed power
Description
The FNP1500/1800 front-ends are power-factor-corrected (PFC) which (depending on model type) provide a 12 VDC or 48 VDC
(1500 or 1800 watt) output, and can be used in hot-swap redundant systems. Their very small dimensions allow configuration of
up to three units in a 1U rack. The FNP front-ends have a front-mounted AC receptacle. The highly efficient thermal design with
internal-fan cooling permits their use over wide temperature ranges and provides very high reliability.
Status information is provided with front panel LEDs, logic signals, and via an I2C management interface. In addition, the I2C bus
can enable the power supply, set high fan speed, adjust the output voltage, and set the output current limit. The FNP1500/1800's
meet international safety standards and display the CE-Mark for the European Low Voltage Directive (LVD).
FNR-3-12G and FNR-3-48G power-shelf solutions provide rectification, system management, and power distribution, while
maintaining high reliability and offering flexibility for future expansion. The power shelves can be configured with up to three hot-
swappable 1500 or 1800-watt AC-DC front-ends.
FNR-3
Power Shelf
FNR-3 shelves provide up to 5400 watts in a 19" rack.
(See the Rack section for power shelf details.)
FNP1500/1800 front-ends have
front-mounted AC input receptacles.
MCD10074 Rev. 1.2, 15-Apr-10 Page 2 of 17 www.power-one.com
FNP1500/1800 Front-Ends
& FNR-3 Power Shelves Data Sheet
Model Selection
Model Input voltage
VAC
auto selected 1
Output 1 Output 2 Rated power
W Compatible
Shelf 2
Vo1 nom
VDC Io1 max
ADC Vo2 nom
VDC Io2 max
ADC
FNP1500-12G 108 – 264
85 – 105
12
12
129 @ 11.64V
101.8 @ 11.78A
12
12
1
1
1512
1212 FNR-3-12G
FNP1500-48G 105 – 264
85 – 105
48
48
32.2
25.4
12
12
1
1
1512
1212 FNR-3-48G
FNP1800-12G 180 – 264
105 – 180
85 – 105
12
12
12
150 @ 11.52V
129 @ 11.64V
101.8A @ 11.78V
12
12
12
1
1
1
1740
1512
1212
FNR-3-12G
FNP1800-48G 180 – 264
105 – 180
85 – 105
48
48
48
39.2
32.2
25.4
12
12
12
1
1
1
1812
1512
1212
FNR-3-48G
1 The available output power is automatically adjusted depending on the input voltage.
2 1U standard racks are available from Power-One. See the Rack (Power Shelf) section of this data sheet for configurations and details.
Absolute Maximum Ratings
Stress in excess of the absolute maximum ratings may cause performance degradation, adversely effect long-term reliability, or
cause permanent damage to the converter.
Parameter Conditions/Description Min Max Unit
Input voltage Continuous
Transient, 60 ms max.
264
300
VAC
VAC
Operating ambient temperature Vi min-Vi max, Io nom, cooling by internal fan
@ 100 % load
@ 50 % load
0
0
50
70
°C
°C
Storage temperature Non-Operating -40 85 °C
Environmental, Mechanical, & Reliability Specifications
Parameter Conditions/Description Min Nom Max Unit
Altitude Operating
Non-Operating
10 k
40 k ASL Ft.
ASL Ft.
Relative humidity, non-condensing Operating 10 90 % RH
Storage 5 95 % RH
Temperature coefficient 0 °C to 70 °C (after 15 min warm-up) 0.02 %/K
Shock IEC/EN 60068-2-27, 11 ms 40 g
p
k
Sinusoidal vibration IEC/EN 60068-2-6
2-8 Hz
8-200 Hz
200-500 Hz
7.5
2
4
mil
gpk
gpk
Random vibration 10-2000 Hz 6.15 grms
MTBF Calculated per Bellcore (SR-332, Issue 1):
GB 25 °C
GB 25 °C (FNP1500-12G)
Demonstrated
230
TBD
250
kh
kh
kh
MCD10074 Rev. 1.2, 15-Apr-10 Page 3 of 17 www.power-one.com
FNP1500/1800 Front-Ends
& FNR-3 Power Shelves Data Sheet
Safety Specifications
Maximum electric strength testing is performed in the factory according to EN 550116, IEC/EN 60950, and UL 60950.
Input-to-output electric strength tests should not be repeated in the field. Power-One will not honor any warranty claims resulting
from electric strength field tests.
Parameter Conditions/description Min Nom Max Unit
Agency approvals UL60950, (UL) CSA 60950 (cUL),
EN 60950(TÜV), CE Mark for LVD
Insulation safety rating Input to case
Input to output
Output to case
Basic
Reinforced
Functional
Electric strength test voltage Input to case
Input to output
Output to case
Output 1 to output 2
2.12
4.2 1
0.5
0.1
kVDC
kVDC
kVDC
kVDC
1 Subassemblies are pre-tested with 4.2 kVDC in accordance with EN50116 and IEC/EN60950.
EMC Specifications
Parameter Description Criterion
Electrostatic discharge IEC/EN 61000-4-2, level 4 Performance criterion B
Electromagnetic field IEC/EN 61000-4-3, level 3 Performance criterion A
Electrical fast transients/burst IEC/EN 61000-4-4, level 3 Performance criterion B
Surge IEC/EN 61000-4-5, level 3 Performance criterion B
Voltage dips and interruptions IEC/EN 61000-4-11 Performance criterion B or better
RF conducted immunity IEC/EN 61000-4-6 10 VAC, AM 80 %, 1 kHz
Performance criterion A
Emissions conducted CISPR 22/EN 55022/EN 61204 Class B
Emissions radiated CISPR 22/EN 55022/EN 61204 Class A
Harmonics IEC/EN 61000-3-2 Class B
Voltage fluctuation and flicker IEC/EN 61000-3-3 Pass
Voltage sag SEMI F47-0200 (High Line 230V) Pass
Input Specifications
Specification is valid for input voltage, load, and temperature ranges, unless otherwise stated.
Parameter Conditions/description Min Nom Max Unit
Input voltage 85 230 264 VAC
Input frequency 47 50/60 63 Hz
Turn-on input voltage Ramping up 79 85 VAC
Turn-off input voltage Ramping down 70 78 VAC
Inrush current limitation 115/230 VAC acc. ETS 300 132-1
< 100 ms
50
Apk
Hold-up time After last AC line peak ,Vi = 230 VAC, Po nom 20 ms
Power factor Vi nom, Io nom 0.95 W/VA
Efficiency Vi = 230 VAC, Io nom, TC = 25 °C 89 1 90 %
Max input current 20 Arms
Input connector 16A – 20 A / 250 VAC; according to IEC320 C19
1 87% for FNP1500-12
MCD10074 Rev. 1.2, 15-Apr-10 Page 4 of 17 www.power-one.com
FNP1500/1800 Front-Ends
& FNR-3 Power Shelves Data Sheet
Output Specifications, 12Vout Models
Specification is valid for input voltage, load, and temperature ranges, unless otherwise stated.
Parameter Conditions/Description Min Nom Max Units
Nominal output voltage Io = 64.5 A 12 VDC
Output voltage set point accuracy Vi = 230 VAC, Io1 = 65.5 A, TC = 25 °C
(Factory setting)
11.93
-0.42
12 12.05
+0.42
VDC
% Vo1 nom
Output voltage trimming Adjustable via I2C (Vo1 set)
Adjustable via Margin pin (R input)
7
6.2
12 13 1
Vo1 set
VDC
VDC
Nominal
current
output 1
FNP1500-12G Io1 nom @ Vi =108 VAC – 264 VAC, Po 1.5 kW
Io1 nom @ Vi = 85 VAC – 105 VAC, Po 1.2 kW
129.0
101.8
129.0
ADC
ADC
Nominal
current
output 1
FNP1800-12G Io1 nom @ Vi =108 VAC – 264 VAC, Po 1.75 kW
Io1 nom @ Vi =108 VAC – 180 VAC, Po 1.5 kW
Io1 nom @ Vi = 85 VAC – 105 VAC, Po 1.2 kW
150.0
129.0
101.8
150.0
ADC
ADC
ADC
Current
limit
output 1
FNP1500-12G Io1 max @ Vi = 108 VAC – 264 VAC droop hiccup
Io1 max @ Vi = 85 VAC – 105 VAC droop hiccup
147.4
120.2
ADC
ADC
Current
limit
output 1
FNP1800-12G Io1 max @ Vi = 180 VAC – 264 VAC high droop
Io1 lim @ Vi = 180 VAC – 264 VAC hiccup
Io1 max @ Vi = 108 VAC – 180 VAC high droop
Io1 lim @ Vi = 108 VAC – 180 VAC hiccup
Io1 max @ Vi = 85 VAC – 105 VAC high droop
Io1 lim @ Vi = 85 VAC – 105 VAC hiccup
156.4
168.4
135.4
147.4
108.2
120.2
ADC
ADC
ADC
ADC
ADC
ADC
Nominal current output 2 Io2 nom @ Vi = 85 VAC – 265 VAC, Po 12 W 1.0 1.0 ADC
Current limit output 2 Io2 max @ Vi = 85 VAC – 265 VAC 1.5 ADC
Static line regulation output 1 Vi min - Vi max, 50 % Io nom, Ta = 25 °C -0.5 0.5 % Vo nom
Static load
regulation
output 1
(droop
characteristic)
FNP1500-12G Vi = 230 V, 5 - 100 % Io nom
Full load to no load [0..129 A] at Vo set = 12V
dVo1 over the setting range [7 to 13V]
11.64
-0.36
- 5.58
12
12.36
+0.36
mV/A
VDC
VDC
Static load
regulation
output 1
(droop
characteristic)
FNP1800-12G Vi = 230 V, 5 - 100 % Io nom
Full load to no load [0..150 A] at Vo set = 12V
dVo1 over the setting range [7 to 13V]
11.52
-0.48
- 5.58
12
12.36
+0.36
mV/A
VDC
VDC
Static load regulation
output 2 (droop characteristic) Full load to no load @ Vi = 85 VAC – 265 VAC 0.4 VDC
Dynamic
load
regulation
Load change 50 % <> 100 % Io nom, dIo/dt =1A/s
Voltage deviation (droop + over- or undershoot)
FNP1500-12G
& FNP1800-12G
-2 2 % Vo nom
FNP1500-12G
& FNP1800-12G
Max. recovery time to within 1% of Vo1 nom 400
s
Current
Share
Difference in current between two units for Vo1 above
10 % load.
FNP1500-12G 12.9 ADC
FNP1800-12G 15 ADC
Start-up time
Time required for output within regulation after initial
application of AC-input (Vi nom, Io nom)
after removal of inhibit (Vi nom, Io nom)
100
1.5
s
ms
Output voltage ripple and noise
(Filter 10nF/10µF)
Vi nom, Io nom, 20 MHz bandwidth
Vo1
Vo2
120
120
mVpp
mVpp
Remote sense Total compensation for cable losses 500 mV
1 FNP1800-12G max is 12V.
MCD10074 Rev. 1.2, 15-Apr-10 Page 5 of 17 www.power-one.com
FNP1500/1800 Front-Ends
& FNR-3 Power Shelf Data Sheet
Output Specifications, 48Vout Models
Specification is valid for input voltage, load, and temperature ranges, unless otherwise stated.
Parameter Conditions/Description Min Nom Max Units
Nominal output voltage Vo1 Io = 16.1 A 48 VDC
Nominal output voltage Vo2 Io = 0.5 A 12 VDC
Output voltage set point accuracy Vi = 230 VAC, Io1 =16.1 A, TC = 25 °C
(47.8 - 48.2 VDC)
-0.5 +0.5 % Vo1 nom
Output voltage trimming
(via I2C or with external resistor)
Adjustable (44.16 to 51.84 VDC) -8 +8 % Vo1 nom
Nominal
current
output 1
FNP1500-48G Io1 nom @ Vi =105 VAC – 264 VAC, Po 1.5 kW
Io1 nom @ Vi = 85 VAC – 105 VAC, Po 1.2 kW
32.2
25.4
ADC
ADC
FNP1800-48G Io1 nom @ Vi =180 VAC – 264 VAC, Po 1.8 kW
Io1 nom @ Vi =105 VAC – 180 VAC, Po 1.5 kW
Io1 nom @ Vi = 85 VAC – 105 VAC, Po 1.2 kW
39.2
32.2
25.4
39.2 ADC
ADC
ADC
Current
limit
output 1
FNP1500-48G Io1 max @ Vi = 105 VAC – 264 VAC droop hiccup
Io1 max @ Vi = 85 VAC – 105 VAC droop hiccup
36.8
30
ADC
ADC
FNP1800-48G Io1 max @ Vi = 180 VAC – 264 VAC droop hiccup
Io1 max @ Vi = 105 VAC – 180 VAC droop hiccup
Io1 max @ Vi = 85 VAC – 105 VAC droop hiccup
43.8
36.8
30
ADC
ADC
ADC
Nominal current output 2 Io2 nom @ Vi = 85 VAC – 264 VAC, Po 12 W 1.0 1.0 ADC
Current limit output 2 Io2 max @ Vi = 85 VAC – 264 VAC 1.5 ADC
Static line regulation output 1 Vi min - Vi max, 50 % Io nom -0.5 0.5 % Vo nom
Static load
regulation
output 1
(droop
characteristic)
FNP1500-48G Vi = 230 V, 5-100 % Io nom
Vo : full load (32.2 ADC) to no load
46.54
90.1
48
49.44
mV/A
VDC
FNP1800-48G Vi = 230 V, 5-100 % Io nom
Vo : full load (32.2 ADC) to no load
45.91
90.1
48
49.44
mV/A
VDC
Static load regulation
output 2 (droop characteristic)
Vi = 230 V, 5-100 % Io nom
Vo : full load (32.2 ADC) to no load
0.4 VDC
Dynamic
load
regulation
Load change 50 % <> 100 % Io nom, dIo/dt =1 A/s
Voltage deviation (droop + over- or undershoot)
% Vo nom
FNP1500-48G -5 5 % Vo nom
FNP1800-48G -5.7 5.7 % Vo nom
All models Max. recovery time to within 1 % of Vo1 nom 400
s
Current
Share
Difference in current between two units for Vo1 above
10 % load.
FNP1500-48G 3.2 ADC
FNP1800-48G 3.9 ADC
Start-up time Time required for output within regulation
after initial application of AC-input (Vi nom, Io nom)
after removal of inhibit (Vi nom, Io nom)
100
1.5
s
ms
Output voltage ripple and noise
(Filter 10 nF/10 µF)
Vi nom, Io nom, 20 MHz bandwidth
Vo1
Vo2
480
120
mVpp
mVpp
Remote sense Total compensation for cable losses 500 mV
MCD10074 Rev. 1.2, 15-Apr-10 Page 6 of 17 www.power-one.com
FNP1500/1800 Front-Ends
& FNR-3 Power Shelf Data Sheet
Protection
Parameter Conditions/Description Min Nom Max Unit
Input fuse Not user accessible 25A, fast blow
Inrush current limitation With NTCs
Output No-load -, short circuit - and overload proof
Overvoltage protection latching1
Tracking
Absolute for 48V models
Absolute for 12V models
115
122
59.5
16.85
% Vo nom
V
V
Overtemperature protection Automatic power shutdown at TC 95 °C
1 Remove input voltage to reset.
Control
Specification is valid for input voltage, load, and temperature ranges, unless otherwise stated.
Parameter Conditions/Description
Status Indication LEDs: DC OK (green), AC OK (green); fan fail and overtemperature (amber)
I2C digital bus Monitors alarm functions and sets parameters
PS present pin Contact closure to logic ground ( internal pull-down resistor of 1 k)
PS remote shutdown / Inhibit pin TTL compatible signal, inhibited when open contact, high or at TTL logic “1”.
Signal referenced to logic return (LRTN)
Power supply OK (I2C)1 AC OK & DC OK & no overcurrent & no overtemperature & fans working
DC current fail (I2C)1 Overcurrent on Io1
AC fail / Power down warning
(I2C & OC)2
Provides a warning that the input power has failed at least 5 ms before the output falls
out of regulation (<90% Vo1 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 green AC OK LED.
DC fail / Output voltage fault
(I2C & OC)2
Internal undervoltage and overvoltage supervision of Vo1.
Open collector signal with 20 mA pull-down capability, referenced to logic return (LRTN).
DC fail will go high or open if Vo1 is < 90% or > 110% of Vo1 set, measured in front of the
ORing FETs.
A green LED on the front panel indicates normal operation.
The LED will flash if in parallel operation Vo1 is OK, but the unit is disabled.
Temperature warning (I2C & OC)2
I2C critical temperature warning: Indicates that the operating temperature has reached
[Tshut-down – 10K]
I2C & OC overtemperature warning: Indicates if the unit is in overtemperature 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 overtemperature condition shuts down the
unit.
An amber LED on the front panel indicates overtemperature or fan fail.
DC voltage monitoring (I2C)1 Monitors the voltage Vo1 at the output connector.
Accuracy ± 0.45 V over setting range, temperature and load.
DC current monitoring (I2C)1 Monitors the output current Io1 : Accuracy ± 0.4A over the load range.
DC voltage trimming
(I2C or external resistor)1
Output voltage trimming Vo1: ± 8 % of Vo set
Setting accuracy over I2C: ± 50mV at Vo nom, ± 150 mV over setting range
Fan speed control (I2C)1 Two fan speed levels automatically set depending on the internal temperature.
The fan speed can be set to full speed or automatic control.
Fan OK (I2C & OC)2 Indicates if the fans are operating or have failed.
Synch. startup pin Overcurrent signal which can be used for synchronous startup of units in parallel or to
recover from an overload condition. (See application note).
1 Detailed I2C information is available from the model’s I2C Manual found on the Power-One web site.
2 Provided over the I2C interface and as an open collector signal on the output connector (OC).
MCD10074 Rev. 1.2, 15-Apr-10 Page 7 of 17 www.power-one.com
FNP1500/1800 Front-Ends
& FNR-3 Power Shelf Data Sheet
Output Connector Pinning and Signal Specificatio n
Output Connector
Description Pin
Location Type Low level
High level V max
I max
Overtemperature /
Fan Fail U1 OC-output, protected by 16 V Zener diode and a 10
resistor in series, referenced to logic GND
< 0.4 V @ 20 mA
Pull up
15 V
20 mA
AC Fail /
Power down warning U2 OC-output, protected by 16 V Zener diode and a 10
resistor in series, referenced to logic GND
< 0.4 V @ 20 mA
Pull up
15 V
20 mA
Power Supply Present U3 Resistor (1 k) connected to logic GND Open
Pull up
10 V
10 mA
DC Fail /
Output voltage fault U4 OC-output, protected by 16 V Zener diode and a 10
resistor in series, referenced to logic GND
< 0.4 V @ 20 mA
Pull up
15 V
20 mA
Internal ground U5
Internal ground (Vo1– line before the output filter).
Do not connect the internal grounds in
systems with several units.
ADDR0, I2C address
bus T1 DIP switch or wire to internal ground,
Internally pull up to 5V (10 k).
Switch closed
Switch open
5V
ADDR1, I2C address
bus T2 DIP switch or wire to internal ground,
Internally pull up to 5V (10 k).
Switch closed
Switch open
5V
ADDR2, I2C address
bus T3 DIP switch or wire to internal ground,
Internally pull up to 5V (10 k).
Switch closed
Switch open
5V
ADDR3, I2C address
bus T4 DIP switch or wire to internal ground,
Internally pull up to 5V (10 k).
Switch closed
Switch open
5V
ADDR4, I2C address
bus T5 DIP switch or wire to internal ground,
Internally pull up to 5V (10 k).
Switch closed
Switch open
5V
DATA, I2C data line S1 I2C compatible signal
referenced to logic GND 5 V or 3.3 V logic
CLOCK, I2C clock line S2 I2C compatible signal
referenced to logic GND 5 V or 3.3 V logic
Vo2 + output S3 Auxiliary power pin, insulated from main output
Vo2 – output S4 Auxiliary ground pin, insulated from main output
Logic ground S5
Internally connected over 10 to Auxiliary GND. Wire
separately form Auxiliary - and main output GND to
minimize noise on signals and I2C.
Leave open if not used.
Output inhibit R1 PS active when pulled low (DC-DC stage off when left
open) Referenced to logic GND
< 0.8 V
> 2.0 V
10 V
3.5 mA
V sense + R2 Open or connected to Vo1+ at the load
(Internally connected to Vo1+ over 100 )
dU < 3 Vpp
30 mA
V sense - R3 Open or connected to Vo1- at the load
(Internally connected to Vo1- over 100 )
dU < 3 Vpp
30 mA
12V models
Output margin
48V models
R4
Open or connected over resistor to internal ground.
Do not connect the margin pins in
systems with several units.
3 VDC
R4
Open or connected to internal ground
(+8 % Vo1) or V sense+ (-8 % Vo1)
Do not connect the margin pins in
systems with several units.
60 VDC
12V models
Synch. startup
48V models
R5 Open or connected to synch startup circuit,
referenced to Vo1 - at the output connector
12V
3mA
R5 Open or connected to synch startup circuit,
referenced to Vo1 - at the output connector
12V
2mA
Vo1 + output
12V models
P2, P4, P6, P8,
P10, P12 Main output + pins
Vo1 – output
12V models
P1, P3, P5,
P7, P9, P11 Main output – pins
Vo1 + output
48V models P2, P4, P6 Main output + pins
Vo1 – output
48V models P1, P3, P5 Main output – pins
MCD10074 Rev. 1.2, 15-Apr-10 Page 8 of 17 www.power-one.com
FNP1500/1800 Front-Ends
& FNR-3 Power Shelf Data Sheet
Mechanical Data (FNP1500/1800 12V Models)
Mechanical Data (H, W, D) 5.6” (141.2mm) x 1.6” (40.5mm) x 11” (279.4mm)
FNP1500/1800 12V Model Output Connector
Descriptions
Rear View
Female Connector: FCI (51732-026 LF)
Mates with:
90° output connector type: Part No. FCI (manufacturer): 51762-11202000AA LF
180° output connector type: Part No. FCI (manufacturer): 51742-11202000AA LF
Locate information on availability of FCI connectors at http://www.stkcheck.com/evs/fcielectronics/fcisearch.asp
Connector drawings available at: http://portal.fciconnect.com/portal/page/portal/FcicntPublic/DocSrchCustDraw
IEC AC power cord with C19 connector VDE 16A: Interpower Components Ltd. 70009110250
IEC AC power cord with C19 connector UL 20A: Interpower Components Ltd. 70025110250
MCD10074 Rev. 1.2, 15-Apr-10 Page 9 of 17 www.power-one.com
FNP1500/1800 Front-Ends
& FNR-3 Power Shelf Data Sheet
Mechanical Data (FNP1500/1800 48V Models)
Mechanical Data (H, W, D) 5.6” (141.2mm) x 1.6” (40.5mm) x 11” (279.4mm)
FNP1500/1800 48V Model Output Connector
Descriptions
Rear View
Female Connector: FCI (51732-020 LF)
Mates with:
90° output connector type: Part No. FCI (manufacturer): 51762-10602000AA LF; Power-One Part No.: ZES258-G
180° output connector type: Part No. FCI (manufacturer): 51742-10602000AA LF
Locate information on availability of FCI connectors at http://www.stkcheck.com/evs/fcielectronics/fcisearch.asp
Connector drawings available at: http://portal.fciconnect.com/portal/page/portal/FcicntPublic/DocSrchCustDraw
IEC AC power cord with C19 connector VDE 16A: Interpower Components Ltd. 70009110250
IEC AC power cord with C19 connector UL 20A: Interpower Components Ltd. 70025110250
MCD10074 Rev. 1.2, 15-Apr-10 Page 10 of 17 www.power-one.com
FNP1500/1800 Front-Ends
& FNR-3 Power Shelf Data Sheet
Paralleling Front-Ends:
For parallel use in minimal configuration systems, only the inhibit pins must be shorted to logic GND. All other pins can be left
open. The power supplies will share the output current automatically (droop current share).
For parallel applications without I2C bus, but the use of all other features, it is recommended to connect all logic GND’s on a
backplane together, to connect all Vo2 -, all V o2 + and to leave the internal GND’s open.
The sense wires can be left open or connected to a common load point, the synch-start pin can be left open or connected to a
synch-start circuit, the inhibit pins can be connected together or used individually. All I2C signals (T1-T5, S1, and S2) can be left
open.
Use of a small foil capacitor > 3µF directly at the power outputs of each unit is recommended in order to prevent voltage drops at
the hot plug. For additional information on paralleling see the following Rack (Power Shelf) section.
Racks
(FNR-3-12G and FNR-3-48G Power Shelves)
Each rack (power shelf) is 1U high with backplane and designed for up to three front-end models in parallel or in n+1 operation.
Each power shelf has:
Massive copper bus bars for low-loss current distribution.
Output terminals with two M4-screws on each power tab.
Two fast-on contacts for system earthing.
Address coding over five pole DIP switch on each unit, 37-pin D-Sub connector with I2C-lines, monitoring signals and
support functions.
Provides a start-up synchronization circuit and EMV filters.
FNR-3-12G and FNR-3-48G Power Shelf Front View
Overall Mechanical Dimensions (FNR-3-12G and FNR-3-48G Power Shelves)
FNR-3 Mechanical Data (W, H, D) 17.7” (449.6 mm) x 1.7” (43.1 mm) x 13” (330.2 mm)
MCD10074 Rev. 1.2, 15-Apr-10 Page 11 of 17 www.power-one.com
FNP1500/1800 Front-Ends
& FNR-3 Power Shelf Data Sheet
Output Connector Descriptions (FNR-3-12G and FNR-3 -48 G)
Location Description
A 5-Bit DIP switch for I2C addressing of PSU 1
B Earth connection
C Earth connection
D Earth connection
E Output 1 minus
F Output 1 plus
G 5-Bit DIP switch for I2C addressing of PSU 2
H 37-pin SUB-D connector, controlling and auxiliary power (output 2)
I 5-Bit DIP switch for I2C addressing of PSU 3
A B C D EFGH
I
MCD10074 Rev. 1.2, 15-Apr-10 Page 12 of 17 www.power-one.com
FNP1500/1800 Front-Ends
& FNR-3 Power Shelf Data Sheet
SUB-D Output Connector Pinout and Signal Specification
Output Connector
Description Pin
Location Type Low level
High level V max
I max
Overtemperature /
Fan Fail PSU1 1 OC-output, protected by 16 V Zener diode
and a 10 resistor in series, referenced to logic GND
<0.4 V @ 20 mA
Pull up
15 V
20 mA
Power Supply Present
PSU 1 2 Resistor (1 k) connected to logic GND Open
Pull up
10 V
10 mA
Power Supply Present
PSU 2 3 Resistor (1 k) connected to logic GND Open
Pull up
10 V
10 mA
Open 4
Overtemperature /
Fan Fail PSU 3 5 OC-output, protected by 16 V Zener diode
and a 10 resistor in series, referenced to logic GND
<0.4 V @ 20 mA
Pull up
15 V
20 mA
AC Fail /
Power down warning PSU 3 6 OC-output, protected by 16 V Zener diode
and a 10 resistor in series, referenced to logic GND
<0.4 V @ 20 mA
Pull up
15 V
20 mA
Power Supply Present
PSU 3 7 Resistor (1 k) connected to logic GND Open
Pull up
10 V
10 mA
DC Fail /
Output voltage fault PSU 3 8 OC-output, protected by 16 V Zener diode
and a 10 resistor in series, referenced to logic GND
<0.4 V @ 20 mA
Pull up
15 V
20 mA
Overtemperature /
Fan Fail PSU 2 9 OC-output, protected by 16 V Zener diode
and a 10 resistor in series, referenced to logic GND
<0.4 V @ 20 mA
Pull up
15 V
20 mA
Synch._Start_A 10
Sync_start_A , Active high
The signals of several racks can be
connected together in such a way that all
supplies will be inhibited until the last supply has
recovered from its overcurrent condition,
referenced to logic GND
<7V off
< 9V
15V
10mA
Open 11
Output inhibit
PSU 1-3 12
Active low (DC-DC stage off when pin is open or on
high potential)
Referenced to logic GND
<0.8 V
>2.0 V
10 V
3.5 mA
V sense + 13 Open or connected to Vo1+ at the load
Internally (PSU) connected to Vo1+ over 100
dU < 3 Vpp
30 mA
V sense - 14 Open or connected to Vo1- at the load
Internally (PSU) connected to Vo1- over 100
dU < 3 Vpp
30 mA
Open 15
NC 16
NC 17
NC 18
NC 19
AC Fail/
Power-down warning PSU 1 20 OC-output, protected by 16 V Zener diode
and a 10 resistor in series, referenced to logic GND
<0.4 V @ 20 mA
Pull up
15 V
20 mA
DC Fail/
Output voltage fault PSU 1 21 OC-output, protected by 16 V Zener diode
and a 10 resistor in series, referenced to logic GND
<0.4 V @ 20 mA
Pull up
15 V
20 mA
AC Fail/
Power-down warning PSU 2 22 OC-output, protected by 16 V Zener diode
and a 10 resistor in series, referenced to logic GND
<0.4 V @ 20 mA
Pull up
15 V
20 mA
DC Fail/
Output voltage fault PSU 2 23 OC-output, protected by 16 V Zener diode
and a 10 resistor in series, referenced to logic GND
<0.4 V @ 20 mA
Pull up
15 V
20 mA
DATA, I2C data line 24 I2C compatible signal
referenced to logic GND 5 V or 3.3 V logic
MCD10074 Rev. 1.2, 15-Apr-10 Page 13 of 17 www.power-one.com
FNP1500/1800 Front-Ends
& FNR-3 Power Shelf Data Sheet
SUB-D Output Connector Pinout and Signal Specification (Continued )
Output Connector
Description Pin
Location Type Low level
High level V max
I max
CLOCK, I2C clock line 25 I2C compatible signal
referenced to logic GND 5 V or 3.3 V logic
Auxiliary power +12 V
(Output 2) 26 Vo2+ Aux output, insulated from main output
Auxiliary power ground
(Output 2) 27 Vo2- Aux output, insulated from main output
Logic Gnd 28
Internally connected over 10 to Vo2-, Auxiliary
GND. Wire separately from auxiliary and main output
GND to minimize noise and avoid voltage drops on
signal- and I2C return. Leave open if not used.
Output margin PSU 1 29 Open or connected to V sense-
Vsense- (+8 % Vo1) or Vsense+ (-8 % Vo1)
60V
Output margin PSU 2 30 Open or connected to V sense-
Vsense- (+8 % Vo1) or Vsense+ (-8 % Vo1)
60V
Output margin PSU 3 31 Open or connected to V sense-
Vsense- (+8 % Vo1) or Vsense+ (-8 % Vo1)
60V
NC 32
NC 33
NC 34
NC 35
NC 36
NC 37
Synchronized start-up circuit for paralleling operation
Because of hiccup overcurrent protection, when a supply reaches an overcurrent limit, the output voltage will
immediately turn OFF and after a delay turn ON again. In parallel use, all power supplies have to start synchronized
because of the internal hiccup behavior. Otherwise, the supply which has reached overcurrent first will go to hiccup;
this will overload the other supplies, which then will also go to hiccup. When the first supply has recovered from
hiccup (hiccup dead time), the others remain in hiccup. This will immediately drive the first one into hiccup once
again. This means that without a start-up circuit, a system with several power supplies can never recover from an
overload condition or start-up into full load.
The following additional circuit, required to reach synchronized startup, is already implemented inside the
FNR-3-12G and FNR-3-48G shelves.
MCD10074 Rev. 1.2, 15-Apr-10 Page 14 of 17 www.power-one.com
FNP1500/1800 Front-Ends
& FNR-3 Power Shelf Data Sheet
Synch Start-up Connecti on Between Shelves
The following connection between the shelves is required to achieve a parallel operation. The synch-start circuits
inside the shelves inhibit all power supplies until the last one has recovered from its overcurrent condition and then
synchronize the restart of the outputs.
Synch Start-up Circuit Description
Description Pin
Location,
Definition
Type Low level
High level V max
I max
Auxiliary power +12 V
(Output 2)
26
Vo2+, Aux output, insulated from main output
Logic ground 28
Logic_GND ,Internally connected over 10 to
Vo2-, ( Auxiliary power ground (Output 2))
Output inhibit_A
PSU 1-3 12 Inhibit_A ,Active low (DC-DC stage off)
Referenced to Logic_GND
<0.8 V
>2.0 V
10 V
3.5 mA
Synch. Startup 1
PSU 1-3
R5
(at PSU)
The synch_start pin is connected to the
overcurrent signal of the PSU1-3. In the
case of an overcurrent shutdown, this
signal goes high.
Referenced to Vo1-
<7V off
> 9V
15V
10mA
Synch. Startup_A
Rack FNR-3-12G &
Rack FNR-3-48G 1-N
Pin on the D-Sub
connector on the
backplane
10
Sync_start_A , Active high
The signals of several racks can be
connected together in such a way that all
supplies will be inhibited until the last
supply has recovered from its
overcurrent condition.
Referenced to Logic_GND
NOTE: The Sync-Start pins can be wired together only if the power supplies are connected with a minimal voltage drop on power ground as
achieved on a backplane with massive copper bus bars. If there is a less ideal connection, it is recommended to use an opto-coupler for each
unit (IC1, D3, D2).
MCD10074 Rev. 1.2, 15-Apr-10 Page 15 of 17 www.power-one.com
FNP1500/1800 Front-Ends
& FNR-3 Power Shelf Data Sheet
Mechanical Data (FNR-3-12G and FN R-3-48G Power Shelves)
MCD10074 Rev. 1.2, 15-Apr-10 Page 16 of 17 www.power-one.com
FNP1500/1800 Front-Ends
& FNR-3 Power Shelf Data Sheet
Accessories:
Center Angular Brackets are set in the middle for shelf mounting:
Center Angular Bracket sets can be ordered: Power-One part no.: HZZ01222
Note: Each Center Angular Bracket set contains 2 brackets and 8 screws.
MCD10074 Rev. 1.2, 15-Apr-10 Page 17 of 17 www.power-one.com
FNP1500/1800 Front-Ends
& FNR-3 Power Shelf Data Sheet
Fulcrum:
The handle has been designed to allow easy plug-in and -out in a rack system. The handle (lever) fits into a counter piece
(fulcrum) which is fixed to the bottom of the rack. During the plug, the fulcrum holds the unit down and guides it towards the
output connector. The Power-One part number of the fulcrum and its associated mounting accessories is: HZZ01223.
Individual fulcrum sets can be also ordered: Power-One part no.: HZZ01223.
Note: Each HZZ01223 set contain 2 fulcrums, 2 supports, and mounting accessories.
I2C to USB Interface HZZ02002 G:
I2C Management Software: All FNP front-ends can be controlled via Power-One's GUI-driven I2C Management
software and an I2C-to-USB interface (P/N HZZ02002G). An I2C Programming Manual describes the complete
range of parameters that can be programmed to the FNP1500/1800 front-ends. This manual is available by
searching on "FNP1500" at www.power-one.com.
NUCLEAR AND MEDICAL APPLICATIONS - Power-One products are not designed, intended for use in, or authorized for use as critical
components in life support systems, equipment used in hazardous environments, or nuclear control systems without the express written consent
of the respective divisional president of Power-One, Inc.
TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on the
date manufactured. Specifications are subject to change without notice.
I2C <to>USB
Interface
