PIC480.241D
24V, 20A, 480W, SINGLE PHASE INPUTPIANO-Series

POWER SUPPLY









AC 100-240V Wide-range Input
Active PFC
Width only 59mm
Efficiency up to 95.3%
Safe HiccupPLUS Overload Mode
Full Power Between -25°C and +55°C
DC-OK Relay Contact
3 Year Warranty

PRODUCT DESCRIPTIONSHORT-FORM DATA

These PIANO series units are extraordinarily compact,industrial grade power supplies that focus on theessential features needed in today’s industrial
applications. The excellent cost/performance ratio
presents many new and exciting opportunities withoutcompromising quality or reliability.

Output voltage
Adjustment
range

The unit is equipped with a wide-range input voltage
stage, many safety approvals and a wide operationaltemperature range, which makes the unit applicable for
global use.
The addition of a DC-OK signal makes the unit suitable
for many industry applications such as process control,
factory automation or many other critical applications,where preventive function monitoring can help to avoid
long downtimes.

ORDER NUMBERS
Power Supply

PIC480.241D

Accessory

YR40.242
PIRD20.241
UF20.481

DC 24V

NominalFactory setting
24 – 28V
24.1V
Below +55°C
Output current
20.0 – 17.1A
ambient
12.5 – 10.7A
At +70°C ambient
Derate linearly between +55°C and +70°C
Input voltage AC AC 100-240V±10%
Mains frequency 50-60Hz±6%AC Input current 4.3 / 2.3A
At 120 / 230Vac
Power factor
0.99 / 0.97
At 120 / 230Vac
AC Inrush current 15 / 35A pk
At 120 / 230Vac,
40°C, cold start
Efficiency
94.2 / 95.3%
At 120 / 230Vac
Losses29.6 / 23.7W
At 120 / 230Vac
Hold-up time
27 / 27ms
At 120 / 230Vac
Temperature-25 to +70°C
range
Size (WxHxD)
59x124x127mm
Weight810g / 1.97lb

MAIN APPROVALS
Redundancy module
Redundancy module
Buffer Module

IEC 61010-2-201

UL 61010-2-201

IEC 62368

Jan. 2021 / Rev. 1.1 DS-PIC480.241D-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 24V, 20A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

1/20

PIC480.241D
24V, 20A, 480W, SINGLE PHASE INPUTPIANO-Series

INDEX
Page
1. Intended Use .......................................................3
2. Installation Instructions ......................................4
3. AC-Input...............................................................5
4. DC-Input...............................................................6
5. Input Inrush Current ...........................................6
6. Output .................................................................7
7. Hold-up Time .......................................................8
8. DC-OK Relay Contact ..........................................8
9. Efficiency and Power Losses................................910. Functional Diagram...........................................10
11. Front Side and User Elements ...........................10
12. Connection Terminals .......................................11
13. Lifetime Expectancy ..........................................11
14. MTBF ..................................................................11
15. EMC ....................................................................12
16. Environment ......................................................13
17. Safety and Protection Features ........................14Page
18. Dielectric Strength............................................ 15
19. Approvals and Fulfilled Standards................... 16
20. Regulatory Compliance .................................... 16
21. Physical Dimensions and Weight ..................... 17
22. Accessory ........................................................... 18
22.1. YR40.242 Redundancy Module ................ 18
22.2. PIRD20.241 Redundancy Module ............. 18
22.3. UF20.241 Buffer module .......................... 18
23. Application Notes ............................................. 19
23.1. Charging of Batteries ............................... 19
23.2. Series Operation ....................................... 19
23.3. Parallel Use to Increase Output Power .... 19
23.4. Parallel Use for 1+1 Redundancy ............. 19
23.5. Operation on Two Phases ........................ 20
23.6. Use in a Tightly Sealed Enclosure ............ 20

The information given in this document is correct to the best of our knowledge and experience at the time of
publication. If not expressly agreed otherwise, this information does not represent a warranty in the legal sense of theword. As the state of our knowledge and experience is constantly changing, the information in this data sheet issubject to revision. We therefore kindly ask you to always use the latest issue of this document (available underwww.pulspower.com).
No part of this document may be reproduced or utilized in any form without our prior permission in writing.
Packaging and packaging aids can and should always be recycled. The product itself may not be disposed of as
domestic refuse.

TERMINOLOGY AND ABREVIATIONSPE andsymbolPE is the abbreviation for Protective Earth and has the same meaning as the symbol.

Earth, Ground

This document uses the term “earth” which is the same as the U.S. term “ground”.

T.b.d.

To be defined, value or description will follow later.

AC 230V

A figure displayed with the AC or DC before the value represents a nominal voltage withstandard tolerances included.
E.g.: DC 12V describes a 12V battery disregarding whether it is full (13.7V) or flat (10V)

230VacA figure with the unit (Vac) at the end is a momentary figure without any additional
tolerances included.

50Hz vs. 60Hz

As long as not otherwise stated, AC 100V and AC 230V parameters are valid at 50Hz mains
frequency. AC 120V parameters are valid for 60Hz mains frequency.

may

A key word indicating flexibility of choice with no implied preference.

shall

A key word indicating a mandatory requirement.

shouldA key word indicating flexibility of choice with a strongly preferred implementation.

Jan. 2021 / Rev. 1.1 DS-PIC480.241D-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 24V, 20A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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PIC480.241D
PIANO-Series

24V, 20A, 480W, SINGLE PHASE INPUT

1. INTENDED USEThis device is designed for installation in an enclosure and is intended for commercial use, such as in industrial control,
process control, monitoring, measurement, Audio/Video, information or communication equipment or the like. Do not
use this device in equipment where malfunction may cause severe personal injury or threaten human life.
If this device is used in a manner outside of its specification, the protection provided by the device may be impaired.
Without additional measures to reduce the conducted emissions on the output (e.g. by using a filter), the device is notsuited to supply a local DC power network in industrial, residential, commercial and light-industrial environments.

Jan. 2021 / Rev. 1.1 DS-PIC480.241D-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 24V, 20A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

3/20

PIC480.241D
24V, 20A, 480W, SINGLE PHASE INPUTPIANO-Series

2. INSTALLATION INSTRUCTIONSWARNING

Risk of electrical shock, fire, personal injury or death.

- Turn power off before working on the device and protect against inadvertent re-powering.
- Do not open, modify or repair the device.
- Use caution to prevent any foreign objects from entering into the housing.
- Do not use in wet locations or in areas where moisture or condensation can be expected.
- Do not touch during power-on, and immediately after power-off. Hot surface may cause burns.
Obey the following installation instructions:This device may only be installed and put into operation by qualified personnel.
This device does not contain serviceable parts. The tripping of an internal fuse is caused by an internal defect.
If damage or malfunction should occur during installation or operation, immediately turn power off and send unit to
the factory for inspection.
Install device in an enclosure providing protection against electrical, mechanical and fire hazards.
Install the device onto a DIN-rail according to EN 60715 with the input terminals on the bottom of the device.
Make sure that the wiring is correct by following all local and national codes. Use appropriate copper cables that aredesigned for a minimum operating temperature of 60°C for ambient temperatures up to +45°C, 75°C for ambient
temperatures up to +55°C and 90°C for ambient temperatures up to +70°C. Ensure that all strands of a stranded wire
enter the terminal connection. Unused screw terminals should be securely tightened. Use ferrules for wires on the
input terminals.
The device is designed for pollution degree 2 areas in controlled environments. No condensation or frost is allowed.
The enclosure of the device provides a degree of protection of IP20. The enclosure does not provide protection against
spilled liquids.
The isolation of the device is designed to withstand impulse voltages of overvoltage category III according to IEC
60664-1.
The device is designed as “Class of Protection” I equipment according to IEC 61140. Do not use without a proper PE(Protective Earth) connection.
The device is suitable to be supplied from TN, TT or IT mains networks. The continuous voltage between the input
terminals and the PE potential must not exceed 300Vac.
A disconnecting means shall be provided for the input of the device.
The device is designed for convection cooling and does not require an external fan. Do not obstruct airflow and do notcover ventilation grid!
The device is designed for altitudes up to 5000m (16400ft). Above 2000m (6560ft) the overvoltage category is reduced
to level II and a reduction in output current is required.
Keep the following minimum installation clearances: 40mm on top, 20mm on the bottom, 5mm left and right side.
Increase the 5mm to 15mm in case the adjacent device is a heat source. When the device is permanently loaded withless than 50%, the 5mm can be reduced to zero.
The device is designed, tested and approved for branch circuits up to 20A without additional protection device. For
higher branch circuits use an additional protection device. If an external input protection device is utilized, do not use
one smaller than a 10A B- or 6A C-characteristic to avoid a nuisance tripping of the circuit breaker.
The maximum surrounding air temperature is +70°C (+158°F). The operational temperature is the same as the ambientor surrounding air temperature and is defined 2cm below the device.
The device is designed to operate in areas between 5% and 95% relative humidity.

Jan. 2021 / Rev. 1.1 DS-PIC480.241D-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 24V, 20A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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PIC480.241D
24V, 20A, 480W, SINGLE PHASE INPUTPIANO-Series

3. AC-INPUT
The device is suitable to be supplied from TN, TT or IT mains networks with AC voltage.
Nom.

Allowed voltage L or N to earth
Input frequency
Turn-on voltage
Shut-down voltage
External input protection

AC 100-240V
90-264Vac
Continuous operation
264-300Vac
Occasionally for maximal 500ms
Max.
300VacContinuous, according to IEC 60664-1
Nom. 50–60Hz
±6%
Typ.
81Vac
Steady-state value, see Fig. 3-1
Typ.
63Vac / 71Vac
At no load / nominal load, steady-state value, see Fig. 3-1
See recommendations in chapter 2.

Input current
Power factor
Crest factor

Typ.
Typ.
Typ.

AC 100V
5.2A
0.99
1.6

AC 120V
4.3A
0.99
1.7

AC 230V
2.3A
0.97
2.0

Start-up delay
Rise time

Typ.
Typ.

420ms
100ms

300ms
100ms

230ms
100ms

Typ.

140ms

140ms

140ms

Max.

200mV

200mV

200mV

Turn-on overshootFig. 3-1 Input voltage range, typ.

Rated
input range

Fig. 3-2 Turn-on behavior, definitions

Input
Voltage

max.
500ms

Turn-onShut-down

POUT

VIN
90V

At 24V, 20A, see Fig. 3-3
At 24V, 20A, see Fig. 3-4
At 24V, 20A, The crest factor is themathematical ratio of the peakvalue to RMS value of the input
current waveform.
See Fig. 3-2
At 24V, 20A const. current load,
0mF load capacitance, see Fig. 3-2
At 24V, 20A const. current load,
20mF load capacitance, see Fig. 3-2
See Fig. 3-2- 5%

OutputVoltageStart-up
delay

264V 300Vac

Fig. 3-3 Input current vs. output load at 24V

Rise
Time

Fig. 3-4 Power factor vs. output load

Power Factor, typ.

Input Current, typ.

6A

a, b
c

1.0
a

5

a) 100Vacb) 120Vacc) 230Vac

4
3

b

1

Output Current

0
0

2.5

5

7.5

0.95
0.9

c

2

OvershootAC input
AC input range

10 12.5 15 17.5 20Aa) 100Vacb) 120Vacc) 230Vac

0.85
0.8
0.75

Output Current

2

4

6

8 10 12 14 16 18 20A

Jan. 2021 / Rev. 1.1 DS-PIC480.241D-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 24V, 20A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

5/20

PIC480.241D
24V, 20A, 480W, SINGLE PHASE INPUTPIANO-Series

4. DC-INPUT
Do not operate this power supply with DC-input voltage.

5. INPUT INRUSH CURRENT
An active inrush limitation circuit (NTCs, which are bypassed by a relay contact) limits the input inrush current afterturn-on of the input voltage.
The charging current into EMI suppression capacitors is disregarded in the first microseconds after switch-on.

Inrush current

Max.
Typ.
Typ.
Max.

Inrush energy

AC 100V
15Apeak
13Apeak
13Apeak
3A²s

Fig. 5-1 Typical turn-on behaviour at nominal load, 120Vac
input and 25°C ambient

20ms/DIV
Ipeak = 13A

AC 120V
18Apeak
13Apeak
15Apeak
3A²s

AC 230V
42Apeak
25Apeak
35Apeak
3A²s

At 40°C, cold start
At 25°C, cold start
At 40°C, cold start
At 40°C, cold startFig. 5-2 Typical turn-on behaviour at nominal load, 230Vac
input and 25°C ambient

Input current
5A/DIV

Input voltage 500V/DIV
OutputvoltageJan. 2021 / Rev. 1.1 DS-PIC480.241D-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 24V, 20A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

6/20

PIC480.241D
24V, 20A, 480W, SINGLE PHASE INPUTPIANO-Series

6. OUTPUT
The output provides a SELV/PELV/ES1 rated voltage, which is galvanically isolated from the input voltage.
The output is designed to supply any kind of loads, including capacitive and inductive loads. If extreme large
capacitors, such as EDLCs (electric double layer capacitors or “UltraCaps”) with a capacitance > 3F are connected to the
output, the unit might charge the capacitor in an intermittent mode.
The output is electronically protected against overload, no-load and short-circuits. In case of a protection event,
audible noise may occur.
Output voltage
Adjustment range

Nom.

DC 24V
24-28V
30V

Typ.

Guaranteed value
This is the maximum output voltage which can occur atthe clockwise end position of the potentiometer due
to tolerances. It is not a guaranteed value which can beachieved.
24.1V±0.2%, at full load and cold unit
10mV
Between 90 and 300Vac
100mV
Between 0A and 20A, static value, see Fig. 6-1
100mVpp
Bandwidth 20Hz to 20MHz, 50Ohm
20.0A
At 24V and an ambient temperature below 55°C
12.5A
At 24V and 70°C ambient temperature
17.1A
At 28V and an ambient temperature below 55°C
10.7A
At 28V and 70°C ambient temperature
Derate linearly between +55°C and +70°
Continuous current
For output voltage above 13Vdc, see Fig. 6-1
Intermittent current1) For output voltage below 13Vdc, see Fig. 6-1
27.5A
Continuous current, see Fig. 6-1
30AIntermittent current peak value for typ. 1s
Load impedance 50mOhm, see Fig. 6-2
Discharge current of output capacitors is not included.
Intermittent current average value (R.M.S.)
11A
Load impedance 50mOhm, see Fig. 6-2
6 800µF
Included inside the power supply

Max.

35V

Max.

Factory settings
Line regulation
Load regulation
Ripple and noise voltage
Output current

Typ.
Max.
Max.
Max.
Nom.
Nom.
Nom.
Nom.

Overload behaviour
Overload/ short-circuit current Max.
Typ.

Max.
Output capacitanceBack-feeding loads

The unit is resistant and does not show malfunctioning
when a load feeds back voltage to the power supply. It
does not matter whether the power supply is on or off.
The absorbing energy can be calculated according to
the built-in large sized output capacitor.

1) At heavy overloads (when output voltage falls below 13V), the power supply delivers continuous output current for 2-5s. After this, theoutput is switched off for approx. 7s before a new start attempt with duration of 1s is automatically performed. This cycle is repeated aslong as the overload exists. If the overload has been cleared, the device will operate normally.
Fig. 6-1 Output voltage vs. output current, typ.
Output voltage

Adjustment range

28V
24V

A

Normaloperation

Normaloperation

Short -circuit

30A

13V

0A

5A

10A

15A

First
pulse

B

A: continuous current
B: intermittent current

0V

Fig. 6-2 Short-circuit on output, intermittent current, typ.
OutputCurrent

20A

25A

30A

Output current

t

0
2-5s

7s

1s

7s

1s

7s

Jan. 2021 / Rev. 1.1 DS-PIC480.241D-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 24V, 20A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

7/20

PIC480.241D
24V, 20A, 480W, SINGLE PHASE INPUTPIANO-Series

7. HOLD-UP TIME
The hold-up time is the time during which a power supply’s output voltage remains within specification following theloss of input power. The hold-up time is output load dependent. At no load, the hold-up time can be up to several
seconds. The green DC-ok lamp is also on during this time.

Hold-up Time

typ.
min.
typ.
min.

Fig. 7-1 Hold-up time vs. input voltage

AC 100V
54ms
44ms
27ms
22ms

AC 120V
54ms
44ms
27ms
22ms

AC 230V
54ms
44ms
27ms
22ms

Fig. 7-2 Shut-down behavior, definitions

Hold-up Time

60ms

24V, 10A, typ.

50

24V, 10A, min.

At 24V, 10A, see Fig. 7-1
At 24V, 10A, see Fig. 7-1
At 24V, 20A, see Fig. 7-1
At 24V, 20A, see Fig. 7-1

Zero Transition
Input
Voltage40
30

24V, 20A, typ.

20

24V, 20A, min.

10

Hold-up Time

Input Voltage

0
85

120

155

190

- 5%

OutputVoltage

230Vac8. DC-OK RELAY CONTACT
This feature monitors the output voltage on the output terminals of a running power supply.
Contact closes
Contact opens
Switching hysteresis
Contact ratings
Isolation voltage

As soon as the output voltage reaches 22V.
As soon as the output voltage falls below 22V.
Typically 0.3V
Maximal 60Vdc 0.3A, 30Vdc 1A, 30Vac 0.5A, resistive load
Minimal permissible load: 1mA at 5Vdc
See dielectric strength table in section 18.

Fig. 8-1 DC-ok relay contact behavior

Output Voltage
22V

open

closedJan. 2021 / Rev. 1.1 DS-PIC480.241D-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 24V, 20A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

8/20

PIC480.241D
24V, 20A, 480W, SINGLE PHASE INPUTPIANO-Series

9. EFFICIENCY AND POWER LOSSES
Efficiency
Average efficiency*)

Typ.
Typ.

AC 100V
93.6%
93.4%

Power losses

Typ.
Typ.
Typ.

5.7W
15.6W
32.8W

*)

AC 120V
94.2%
93.8%

AC 230V
95.3%
94.5%

4.6W
14.8W
29.6W

3.5W
13.2W
23.7W

At 24V, 20A
25% at 5A, 25% at 10A,
25% at 15A, 25% at 20A
At 24V, 0A
At 24V, 10A
At 24V, 20A

The average efficiency is an assumption for a typical application where the power supply is loaded with 25% of the nominal load for 25%of the time, 50% of the nominal load for another 25% of the time, 75% of the nominal load for another 25% of the time and with 100%of the nominal load for the rest of the time.
Fig. 9-1 Efficiency vs. output current at 24V,
typ.

Fig. 9-2 Losses vs. output current at 24V, typ.

Efficiency

Power Losses

96%
95
94
93
92
91
90
89
88

(c)
(b)
(a)

(a) 100Vac(b) 120Vac(c) 230Vac

Output Current

4

6

8

10

12

14

40W

(a) 100Vac(b) 120Vac(c) 230Vac

30

(c)

20
10
Output Current

0

16

(a)
(b)

0

18 20A

2

4

6

8 10 12 14 16 18 20A

Fig. 9-3 Efficiency vs. input voltage at 24V,
20A, typ.

Fig. 9-4 Losses vs. input voltage at 24V, 20A,
typ.

Efficiency

Power Losses

96%

40W

95

30

94

20

93
92

10

91

Input Voltage

90
85

120

155

190

Input Voltage

0
225 260Vac

85

120

155

190

225 260Vac

Jan. 2021 / Rev. 1.1 DS-PIC480.241D-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 24V, 20A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

9/20

PIC480.241D
24V, 20A, 480W, SINGLE PHASE INPUTPIANO-Series

10. FUNCTIONAL DIAGRAM
Fig. 10-1 Functional diagram

L
N

Input Fuse
Input Filter
Input Rectifier
Inrush Current Limiter

Power
Converter

PFC
Converter

Temperature
Shutdown

OutputOverVoltage
Protection

OutputFilter

+
+
-

DC-ok
Relay

DC-ok
Contact
DC-ok
LED

OutputVoltage
Regulator

VOUT

11. FRONT SIDE AND USER ELEMENTS
Fig. 11-1 Front sideA

Input Terminals
N, LLine input
PE (Protective Earth) input

B

Output Terminals
Two identical + poles and two identical - poles+
Positive output–
Negative (return) output

C

DC-OK LED (green)
On, when the output voltage is above 18V.

D Output Voltage Adjustment Potentiometer
E

DC-OK Relay Contact
The DC-OK relay contact is not synchronized with the DC-OK LED.
See chapter 8 for details.

Jan. 2021 / Rev. 1.1 DS-PIC480.241D-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 24V, 20A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

10/20

PIC480.241D
24V, 20A, 480W, SINGLE PHASE INPUTPIANO-Series

12. CONNECTION TERMINALSThe terminals are IP20 finger safe constructed and suitable for field- and factory wiring.
Type
Solid wire
Stranded wire
American Wire Gauge
Max. wire diameter (including ferrules)
Recommended tightening torque
Wire stripping length
Screwdriver

Input
Screw termination
Max. 6mm2Max. 4mm2
AWG 20-10
2.8mm
Max. 1Nm, 9lb-in
7mm / 0.28inch
3.5mm slotted or crosshead No 2

OutputScrew termination
Max. 6mm2Max. 4mm2
AWG 20-10
2.8mm
Max. 1Nm, 9lb-in
7mm / 0.28inch
3.5mm slotted or crosshead No 2

DC-OK-Signal
Push-in termination
Max. 1.5mm2Max. 1.5mm2
AWG 24-16
1.6mm
7mm / 0.28inch
3mm slotted to open
the spring

13. LIFETIME EXPECTANCYThe Lifetime expectancy shown in the table indicates the minimum operating hours (service life) and is determined by
the lifetime expectancy of the built-in electrolytic capacitors. Lifetime expectancy is specified in operational hours andis calculated according to the capacitor’s manufacturer specification. The manufacturer of the electrolytic capacitors
only guarantees a maximum life of up to 15 years (131 400h). Any number exceeding this value is a calculated
theoretical lifetime which can be used to compare devices.
Lifetime expectancy

AC 100V
72 000h
167 000h
203 000h
472 000h

AC 120V
79 000h
171 000h
223 000h
485 000h

AC 230V
102 000h
197 000h
288 000h
557 000h

At 24V, 20A and 40°C
At 24V, 10A and 40°C
At 24V, 20A and 25°C
At 24V, 10A and 25°C

14. MTBF
MTBF stands for Mean Time Between Failure, which is calculated according to statistical device failures, and indicatesreliability of a device. It is the statistical representation of the likelihood of a unit to fail and does not necessarily
represent the life of a product.
The MTBF figure is a statistical representation of the likelihood of a device to fail. A MTBF figure of e.g. 1 000 000h
means that statistically one unit will fail every 100 hours if 10 000 units are installed in the field. However, it can not
be determined if the failed unit has been running for 50 000h or only for 100h.
For these types of units the MTTF (Mean Time To Failure) value is the same value as the MTBF value.
MTBF SN 29500, IEC 61709
MTBF MIL HDBK 217F

AC 100V
595 000h
1 090 000h
274 000h
368 000h
59 000h
76 000h

AC 120V
611 000h
1 116 000h
275 000h
370 000h
59 000h
76 000hAC 230V
704 000h
1 252 000h
289 000h
386 000h
63 000h80 000h

At 24V, 20A and 40°C
At 24V, 20A and 25°C
At 24V, 20A and 40°C, Ground Benign GB40
At 24V, 20A and 25°C, Ground Benign GB25
At 24V, 20A and 40°C, Ground Fixed GF40
At 24V, 20A and 25°C, Ground Fixed GF25

Jan. 2021 / Rev. 1.1 DS-PIC480.241D-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 24V, 20A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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PIC480.241D
24V, 20A, 480W, SINGLE PHASE INPUTPIANO-Series

15. EMCThe EMC behavior of the device is designed for applications in industrial environment as well as in residential,commercial and light industry environments.
The device complies with EN 61000-6-1, EN 61000-6-2, EN 61000-6-3, EN 61000-6-4, EN 61000-3-2 and EN 61000-3-3.
The device complies with FCC Part 15 rules. Operation is subjected to following two conditions: (1) this device may notcause harmful interference, and (2) this device must accept any interference received, including interference that may
cause undesired operation.
Without additional measures to reduce the conducted emissions on the output (e.g. by using a filter), the device is notsuited to supply a local DC power network in industrial, residential, commercial and light-industrial environments.
EMC Immunity
Electrostatic discharge

EN 61000-4-2

Electromagnetic RF field
Fast transients (Burst)

EN 61000-4-3
EN 61000-4-4

Surge voltage on input

EN 61000-4-5

Surge voltage on output

EN 61000-4-5

Surge voltage on DC-OK
Conducted disturbance
Mains voltage dips

EN 61000-4-5
EN 61000-4-6
EN 61000-4-11

Voltage interruptions
Powerful transients

EN 61000-4-11
VDE 0160

Contact discharge
Air discharge
80MHz-2.7GHz
Input lines
Output lines
DC-OK signal (coupling clamp)
LN
L  PE, N  PE
++ / -  PE
DC-OK signal  PE
0.15-80MHz
0% of 100Vac
40% of 100Vac
70% of 100Vac
0% of 200Vac
40% of 200Vac
70% of 200Vac
0V
Over entire load range

8kV
8kV
20V/m
4kV
2kV
2kV
2kV
4kV
1kV
2kV
1kV
20V
0Vac, 20ms
40Vac, 200ms
70Vac, 500ms
0Vac, 20ms
80Vac, 200ms
140Vac, 500ms
5000ms
750V, 0.3ms

Criterion A
Criterion A
Criterion A
Criterion A
Criterion A
Criterion A
Criterion A
Criterion A
Criterion A
Criterion A
Criterion A
Criterion A
Criterion A
Criterion C
Criterion A
Criterion A
Criterion A
Criterion A
Criterion C
Criterion A

Performance criterions:
A: The device shows normal operation behavior within the defined limits.
C: Temporary loss of function is possible. The device may shut-down and restarts by itself. No damage or hazards for the device will occur.

EMC Emission
Conducted emission
input lines
Conducted emission
output lines
Radiated emission
Harmonic input current
Voltage fluctuations, flicker

EN 55011, EN 55032, FCC Part 15,
CISPR 11, CISPR 32
IEC/CISPR 16-1-2, IEC/CISPR 16-2-1

Class B
Limits for DC power port acc.
EN 61000-6-3 not fulfilled
Class B
Fulfilled, Class A limits
Fulfilled, tested with constantcurrent loads, non pulsing

EN 55011, EN 55032
EN 61000-3-2
EN 61000-3-3

Switching frequencies:
PFC converter
Main converter
Auxiliary converter

80kHz to 130kHz
75kHz to 180kHz
60kHz

Input voltage and load dependent
Output voltage and load dependent
Fixed frequency

Jan. 2021 / Rev. 1.1 DS-PIC480.241D-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 24V, 20A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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PIC480.241D
24V, 20A, 480W, SINGLE PHASE INPUTPIANO-Series

16. ENVIRONMENT
Operational temperature

Storage temperature
Output de-rating

Humidity
Atmospheric pressure
AltitudeOver-voltage category
Impulse withstand voltages
Degree of pollution
Vibration sinusoidal

Shock

Audible noise

Operational temperature is the same as the ambientor surrounding temperature and is defined as the airtemperature 2cm below the unit.
-40°C to +85°C (-40°F to 185°F)
For storage and transportation
12W/°C
Between +55°C and +70°C (131°F to 140°F)
30W/1000m or 5°C/1000m
For altitudes >2000m (6560ft), see Fig. 16-2
The de-rating is not hardware controlled. The user has to take this into consideration tostay below the de-rated current limits in order not to overload the unit.
5 to 95% r.h.
According to IEC 60068-2-30
110-54kPa
See Fig. 16-2 for details
Up to 5000m (16 400ft)
See Fig. 16-2 for details
II
According to IEC 60664-1, for altitudes up to 5000m
4kV (according to over-voltage
Input to PE
category III)
According to IEC 60664-1, for altitudes up to 2000m
2
According to IEC 60664-1, not conductive
2-17.8Hz: ±1.6mm;
According to IEC 60068-2-6
17.8-500Hz: 2g
2 hours / axis
30g 6ms, 20g 11ms
According to IEC 60068-2-27
3 bumps per direction, 18
bumps in total
Shock and vibration is tested in combination with DIN-Rails according to EN 60715 with aheight of 15mm and a thickness of 1.3mm and standard orientation.
Some audible noise may be emitted from the power supply during no load, overload or
short circuit.
-25°C to +70°C (-13°F to 158°F)

Fig. 16-1 Output current vs. ambient temp.

Allowed Output Current at 24V

Fig. 16-2 Output current vs. altitude

Allowed Output Current at 24V

20A

20.0A
18.8A
16.3A

A
B

12.5A

A... Tamb < 45°C
B... Tamb < 55°C

0
-25

0

+55 +70°C
Ambient Temperature

Altitude 0mAP*) 110kPa*) Atmospheric pressure

2000m
80kPa

4000m 5000m
62kPa 54kPa

Jan. 2021 / Rev. 1.1 DS-PIC480.241D-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 24V, 20A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

13/20

PIC480.241D
24V, 20A, 480W, SINGLE PHASE INPUTPIANO-Series

17. SAFETY AND PROTECTION FEATURES
Isolation resistanceAt delivered condition between input and output,
measured with 500Vdc
At delivered condition between input and PE,
measured with 500Vdc
At delivered condition between output and PE,
measured with 500Vdc
At delivered condition between output and DC-OK
contacts, measured with 500Vdc
Resistance between PE terminal and the housing in
the area of the DIN-rail mounting bracket.

Min.

500mOhm

Min.

500mOhm

Min.

500mOhm

Min.

500mOhm

PE resistanceMax.

0.1OhmOutput over-voltage protection

Typ.
Max.

30.5Vdc
32.0Vdc
In case of an internal defect, a redundant circuit limits the maximum output
voltage. The output shuts down and automatically attempts to restart.
I
According to IEC 61140
A PE (Protective Earth) connection is required
IP 20
According to EN/IEC 60529
Output shut-down with automatic restart.
Included
Temperature sensors are installed on criticalcomponents inside the unit and turn the unit off insafety critical situations, which can happen e.g. when
ambient temperature is too high, ventilation is
obstructed or the de-rating requirements are notfollowed. There is no correlation between theoperating temperature and turn-off temperaturesince this is dependent on input voltage, load andinstallation methods.
MOV (Metal Oxide
For protection values see chapter 15 (EMC).
Varistor)
Not user replaceable slow-blow high-braking
Includedcapacity fuse
0.12mA / 0.30mA
At 100Vac, 50Hz, TN-,TT-mains / IT-mains
0.17mA / 0.45mA
At 120Vac, 60Hz, TN-,TT-mains / IT-mains
0.27mA / 0.71mA
At 230Vac, 50Hz, TN-,TT-mains / IT-mains
0.15mA / 0.38mA
At 110Vac, 50Hz, TN-,TT-mains / IT-mains
0.21mA / 0.56mA
At 132Vac, 60Hz, TN-,TT-mains / IT-mains
0.35mA / 0.91mA
At 264Vac, 50Hz, TN-,TT-mains / IT-mains

Class of protection
Ingress protection
Over-temperature protection

Input transient protection
Internal input fuse
Touch current (leakage current)

Typ.
Typ.
Typ.
Max.
Max.
Max.

Jan. 2021 / Rev. 1.1 DS-PIC480.241D-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 24V, 20A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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PIC480.241D
24V, 20A, 480W, SINGLE PHASE INPUTPIANO-Series

18. DIELECTRIC STRENGTH
The output voltage is floating and has no ohmic connection to the ground.
The output is insulated to the input by a double or reinforced insulation.
Type and routine tests are conducted by the manufacturer. Field tests may be conducted in the field using theappropriate test equipment which applies the voltage with a slow ramp (2s up and 2s down). Connect all inputterminals together as well as all output poles before conducting the test. When testing, set the cut-off current settings
to the value in the table below.
We recommend that either the + pole or the – pole shall be connected to the protective earth system. This helps to
avoid situations in which a load starts unexpectedly or can not be switched off when unnoticed earth faults occur.

Type test

60s

A
2500Vac

Routine test

5s

2500Vac

2500Vac

500Vac

500VacField test
5s
Field test cut-off
current settings

2000Vac> 10mA

2000Vac> 10mA

500Vac> 20mA

500Vac> 1mA

Fig. 18-1 Dielectric strength

Input

DC-ok
B *)

L
N

B

A

D
OutputEarth, PE
C

+

-

B
3000Vac

C
500VacD
500VacB*)
When testing input to DC-OK ensure that the maximal voltage between DC-OK andthe output is not exceeded (column D). We recommend connecting DC-OK pins andthe output pins together when performing the test.

Jan. 2021 / Rev. 1.1 DS-PIC480.241D-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 24V, 20A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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PIC480.241D
24V, 20A, 480W, SINGLE PHASE INPUTPIANO-Series

19. APPROVALS AND FULFILLED STANDARDSUL Certificate
Listed equipment for category NMTR - UL 61010-2-201 Electrical
Equipment for Measurement, Control and Laboratory Use Particular requirements for control equipment
Applicable for US and Canada
E-File: E198865
CB Scheme Certificate
IEC 61010-2-201 Electrical Equipment for Measurement, Control
and Laboratory Use - Particular requirements for control
equipment
CB Scheme Certificate
IEC 62368-1 Audio/video, information and communication
technology equipment - Safety requirements
Output safety level: ES1

UL 61010

IEC 61010

IEC 62368

Manufacturer's Declaration (Online Document)
Airborne Contaminants Corrosion Test
Severity Level: G3 Harsh
H2S: 100ppb
NOx: 1250ppb
Cl2: 20ppb
SO2: 300ppb
Test Duration: 3 weeks, which simulates a service life of at least 10
years
Paint Wetting Impairment Substances Test (or LABS-Test)
Tested for Zone 2 and test class C1 according to VDMA 24364-C1-L/W
for solvents and water-based paints

ISA-71.04-1985

VDMA 24364

20. REGULATORY COMPLIANCE
EU Declaration ofConformity

REACH Directive

WEEE Directive

RoHS (China RoHS 2)

EAC TR Registration

The CE mark indicates conformance with the- EMC directive- Low-voltage directive- RoHS directive
Manufacturer's Statement
EU-Directive regarding the Registration, Evaluation,
Authorization and Restriction of Chemicals
Manufacturer's Statement
EU-Regulation on Waste Electrical and Electronic Equipment
Registered in Germany as business to business (B2B) products.
Manufacturer's Statement
Administrative Measures for the Restriction of the Use ofHazardous Substances in Electrical and Electronic Products
25 years
EAC Certificate
EAC EurAsian Conformity - Registration Russia, Kazakhstan
and Belarus
8504408200, 8504409000

Jan. 2021 / Rev. 1.1 DS-PIC480.241D-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 24V, 20A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

16/20

PIC480.241D
24V, 20A, 480W, SINGLE PHASE INPUTPIANO-Series

21. PHYSICAL DIMENSIONS AND WEIGHT
Width
HeightDepth

WeightDIN-Rail
Housing material
Installation clearances
Penetration protection

59mm 2.32’’124mm 4.88’’127mm 5.0’’
The DIN-rail height must be added to the unit depth to calculate the total required
installation depth.
810g / 1.79lb
Use 35mm DIN-rails according to EN 60715 or EN 50022 with a height of 7.5 or 15mm.
Body: Aluminium alloy
Cover: zinc-plated steel
See chapter 2
Small parts like screws, nuts, etc. with a diameter larger than 4.5mm

Fig. 21-1 Front viewFig. 21-2 Side viewAll dimensions in mm

All dimensions in mm

Jan. 2021 / Rev. 1.1 DS-PIC480.241D-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 24V, 20A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

17/20

PIC480.241D
24V, 20A, 480W, SINGLE PHASE INPUTPIANO-Series

22. ACCESSORY
22.1. YR40.242 REDUNDANCY MODULEThe YR40.242 is a dual redundancy module, which can be used to build 1+1 or N+1 redundant
systems.
The device is equipped with two 20A nominal input channels, which are individually decoupled byutilizing MOSFET technology. The output can be loaded with a nominal 40A continuous current.
Using MOSFETSs instead of diodes reduces heat generation, losses and voltage drop between input
and output. Due to these advantages, the unit is very narrow and only requires 36mm width on the
DIN-rail.
The device does not require an additional auxiliary voltage and is self-powered even in case of ashort circuit across the output. It requires suitable power supplies on the input, where the sum of thecontinuous short circuit current stays below 26A. This is typically achieved when the power supplies
are featured with an intermittent overload behavior (Hiccup Mode).
See chapter 23.4 for wiring information.

22.2. PIRD20.241 REDUNDANCY MODULE
The PIRD20.241 is a dual redundancy module, which can be used to build 1+1 or N+1 redundant
systems.
The device is equipped with two 10A nominal input channels, which are individually decoupled byutilizing diode technology. The output can be loaded with a nominal 20A continuous current.
The device does not require an additional auxiliary voltage and is self-powered even in case of ashort circuit across the output.
The unit is very narrow and only requires 39mm width on the DIN-rail.
See chapter 23.4 for wiring information.

22.3. UF20.241 BUFFER MODULEThe UF20.241 buffer module is a supplementary device for DC 24V power supplies. It delivers
power to bridge typical mains failures or extends the hold-up time after the AC power is turned
off.
When the power supply provides a sufficient voltage, the buffer module stores energy in the
integrated electrolytic capacitors. When the mains voltage is lost, the stored energy is released to
the DC-bus in a regulated process.
The buffer module can be added in parallel to the load circuit at any given point and does not
require any control wiring.
One buffer module can deliver 20A additional current and can be added in parallel to increase
the output ampacity or the hold-up time.
For longer hold-up times the UF40.241 might also be an option.

Jan. 2021 / Rev. 1.1 DS-PIC480.241D-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 24V, 20A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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PIC480.241D
24V, 20A, 480W, SINGLE PHASE INPUTPIANO-Series

23. APPLICATION NOTES
23.1. CHARGING OF BATTERIES
Do not use the power supply to charge batteries.

23.2. SERIES OPERATION

Unit AAC

Devices of the same type can be connected in series for higher output
voltages. It is possible to connect as many units in series as needed, providing
the sum of the output voltage does not exceed 150Vdc. Voltages with apotential above 60Vdc must be installed with a protection against touching.
Avoid return voltage (e.g. from a decelerating motor or battery) which isapplied to the output terminals.

DC+

Unit BAC

Keep an installation clearance of 15mm (left / right) between two power
supplies and avoid installing the power supplies on top of each other. Do
not use power supplies in series in mounting orientations other than thestandard mounting orientation.

+
-

DC

Load

+
-

Earth
(see notes)

Pay attention that leakage current, EMI, inrush current, harmonics will increase when using multiple devices.

23.3. PARALLEL USE TO INCREASE OUTPUT POWER
Do not use the power supply in parallel to increase the output power.

23.4. PARALLEL USE FOR 1+1 REDUNDANCY
The device can be used to built 1+1 redundant systems.
1+1 Redundancy:
Devices can be paralleled for redundancy to gain higher system availability. Redundant systems require a certain
amount of extra power to support the load in case one device fails. The simplest way is to put two devices in parallel.
This is called a 1+1 redundancy. In case one device fails, the other one is automatically able to support the load current
without any interruption. It is essential to use a redundancy module to decouple devices from each other. This
prevents that the defective unit becomes a load for the other device and the output voltage cannot be maintained any
more.
1+1 redundancy allows ambient temperatures up to +70°C.
Pay attention that leakage current, EMI, inrush current, harmonics will increase when using multiple devices.
Recommendations for building redundant power systems:- Use separate input fuses for each device.
- Use separate mains systems for each device whenever it is possible.
- Monitor the individual devices. Therefore, use the DC-OK signal of the device.
- It is desirable to set the output voltages of all devices to the same value (± 100mV) or leave it at the factory setting.

Jan. 2021 / Rev. 1.1 DS-PIC480.241D-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 24V, 20A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

19/20

PIC480.241D
24V, 20A, 480W, SINGLE PHASE INPUTPIANO-Series

Wiring examples:Fig. 23-2 1+1 Redundant wiring with 2 PIRD20.241

Fig. 23-1 1+1 Redundant wiring with 1 YR40.242
20A
Load

+ + -

-

Output
24V,20A
DCOK

o
o

Power
SupplyInput

L N PE

+

+ + -

-

DCOK

YR40.242

DCOK

o
o

o
o

Power
Supply
Input

Input

+ - + --

Output
24V,20A

Power
SupplyInput Input
2
1

I

+ + -

-

Output
24V,20A

OutputRedundancy
ModuleFailureMonitorFailureMonitor

L N PEL N PE+ + -- - + +
Input Input
2
1

PIRD20.241
Redundancy
Module-Output
24V,20A
DCOK

o
o

Power
SupplyOutputInput Input
2
1

PIRD20.241
Redundancy
ModuleOutput

Input

- + +

- - + +- + +L N PE

20A
Load

I

I

L

I

L

N

N

PE

Optionally a YR40.241 can be used, which has the input terminals
on top and output on bottomPE

23.5. OPERATION ON TWO PHASESThe power supply can also be used on two-phases of a three-phase-system.
Such a phase-to-phase connection is allowed as long as the supplying
voltage is below 240V+10%.

240V +10% max.

Ensure that the wire, which is connected to the N-terminal, isappropriately fused.

Power Supply

L1

L3

The maximum allowed voltage between a Phase and the PE must be
below 300Vac.

L2

AC
L
N
PE
DC

23.6. USE IN A TIGHTLY SEALED ENCLOSURE
When the power supply is installed in a tightly sealed enclosure, the temperature inside the enclosure will be higher
than outside. In such situations, the inside temperature defines the ambient temperature for the power supply.
The following measurement results can be used as a reference to estimate the temperature rise inside the enclosure.
The power supply is placed in the middle of the box, no other heat producing items are inside the box
The temperature sensor inside the box is placed in the middle of the right side of the power supply with a distance of
1cm.
The following measurement results can be used as a reference to estimate the temperature rise inside the enclosure.
Enclosure size

Input voltage
Load
Temperature inside the box
Temperature outside the box
Temperature rise

Case A
180x180x165mm
Rittal Typ IP66 Box
PK 9519 100, plastic
230Vac
24V, 16A; (=80%)
48.3°C
21.0°C
27.3K

Case B
180x180x165mm
Rittal Typ IP66 Box
PK 9519 100, plastic
230Vac
24V, 20A; (=100%)
55.3°C
21.0°C
34.3K

Jan. 2021 / Rev. 1.1 DS-PIC480.241D-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 24V, 20A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

20/20