CP20.241-M1
24V, 20A, SINGLE PHASE INPUT

CP-Series

POWER SUPPLY
▪
▪
▪
▪
▪
▪
▪
▪
▪
▪
▪
▪

2MOPP safety approved for medical applications according toIEC 60601-1
Quick-connect spring-clamp terminals
AC 100-240V wide-range input
Width only 48mm
Efficiency up to 95.6%, excellent partial load efficiency
Easy fuse breaking – 3 times nominal current for 12ms
Safe HiccupPLUS overload mode
Active power factor correction (PFC)
Minimal inrush current surge
Full power between -25°C and +60°C
DC-OK relay contact
3 Year warranty

PRODUCT DESCRIPTIONSHORT-FORM DATAThe CP20.241-M1 is a DIN rail mountable single-phase-input
power supply for use in industrial and medical equipment. It
provides a stable and galvanically separated SELV/PELV output
voltage.

Output voltage
Adjustment range
Output current
Range AThe specialty of this power supply is the 2MOPP (two means ofpatient protection) safety approval for medical use and thefulfillment of the required EMC tests for professional healthcare
facility and home healthcare environments.

Output current
Range BThe CP-Series is part of the DIMENSION power supply family. The
most outstanding features of CP20.241-M1 are the highefficiency, advanced inrush current limitation, active PFC and thewide operational temperature range.
High immunity to transients and power surges as well as low
electromagnetic emission, a DC-OK relay contact and a large
international approval package for a variety of applications makes
this unit suitable for nearly every situation.

ORDER NUMBERS

Input voltage AC
Range A
Range B
Mains frequency
Input current AC
Power factor
Input voltage DC
Input current DC
Input Inrush current
Efficiency
Power losses
Hold-up time
Temperature range
Size (WxHxD)
WeightDC 24V
Nominal24 - 28V
Factory setting 24.1V
20.0 – 17.1A
Up to +60°C ambient
15.0 – 13.0A
At +70°C ambient
Derate linearly between +60°C and +70°C
18.0 – 15.4A
Up to +60°C ambient
13.5 – 9.6A
At +70°C ambient
Derate linearly between +60°C and +70°C
AC 120-240V
AC 100-240V
50-60Hz4.26 / 2.23A
0.99 / 0.98
DC 110-150V
4.64A
10.0 / 4.5Apeak
94.2 / 95.6%
29.6 / 22.1W
32 / 32ms-25°C to +70°C
48x124x127mm
830g-15%/+10%-15%/+10%±6%
At 120 / 230Vac
At 120 / 230Vac±20%
At 110Vdc
At 120 / 230Vac
At 120 / 230Vac
At 120 / 230Vac
At 120 / 230Vac
Without DIN rail

MAIN APPROVALSPower Supply

CP20.241-M1

Medical power supply
with Spring-clamp terminal

Accessory

ZM10.WALL
ZM12.SIDE

Wall/panel mount bracket
Side mount bracket

For details and the complete approval list see chapter 20.

Medical2MOPP - IEC 60601-1

Feb. 2024 / Rev. 1.0 DS-CP20.241-M1-EN
All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

1/28

CP20.241-M1
24V, 20A, SINGLE PHASE INPUT

CP-Series

INDEX
Page
1. Intended Use ................................................................ 3
2. Installation Instructions ................................................ 3
3. AC-Input ....................................................................... 5
4. DC-Input ....................................................................... 6
5. Input Inrush Current ..................................................... 7
6. Output .......................................................................... 8
7. Hold-up Time .............................................................. 10
8. DC-OK Relay Contact .................................................. 10
9. Efficiency and Power Losses ....................................... 11
10. Functional Diagram .................................................... 12
11. Front Side and User Elements .................................... 13
12. Connection Terminals ................................................ 13
13. Lifetime Expectancy ................................................... 14
14. MTBF .......................................................................... 14
15. EMC – According to Medical Standards ..................... 15
16. EMC – According to Generic Standards ...................... 16
17. Environment ............................................................... 17
18. Safety and Protection Features .................................. 18
19. Dielectric Strength ...................................................... 19Page
20. Approved, Fulfilled or Tested Standards .................... 20
21. Regulatory Product Compliance ................................ 20
22. Physical Dimensions and Weight ............................... 21
23. Accessories................................................................. 2223.1. ZM10.WALL - Wall/Panel Mount Bracket......... 2223.2. ZM12.SIDE - Side Mounting Bracket................. 23
24. Application Notes....................................................... 24
24.1. Peak Current Capability .................................... 24
24.2. Output Circuit Breakers .................................... 25
24.3. Charging of Batteries ........................................ 25
24.4. Series Operation............................................... 26
24.5. Parallel Use to Increase Output Power ............ 26
24.6. Parallel Use for Redundancy ............................ 26
24.7. Inductive and Capacitive Loads ........................ 26
24.8. Operation on Two Phases ................................ 26
24.9. Use in a Tightly Sealed Enclosure ..................... 26
24.10. Mounting Orientations ..................................... 27

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 the word. As the state of ourknowledge and experience is constantly changing, the information in this data sheet is subject to revision. We therefore kindly ask you
to always use the latest issue of this document (available under www.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 with standard tolerances(usually ±15%) 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 230V parameters are valid at 50Hz 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.

Feb. 2024 / Rev. 1.0 DS-CP20.241-M1-EN
All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

2/28

CP20.241-M1
24V, 20A, SINGLE PHASE INPUT

CP-Series

1. INTENDED USEThis device is designed for installation in an enclosure and is intended for use in medical equipment. Do not use this device in HF surgicalequipment or similar apertures.
Do not use this device in equipment, where malfunctioning may cause severe personal injury or threaten human life without additional
appropriate safety devices, that are suited for the end-application.
If this device is used in a manner outside of its specification, the protection provided by the device may be impaired.

2. INSTALLATION INSTRUCTIONSWARNING

Risk of electrical shock, fire, personal injury or death- Turn power off before working on the device. Protect against inadvertent re-powering.
- Do not open, modify or repair the unit.
- Use caution to prevent any foreign objects from entering 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 surfaces 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 the 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. Other mounting
orientations require a reduction in output current.
Use shielded or unshielded cables, twisted or untwisted cables of any length. Make sure that the wiring is correct by following all local
and national codes. Use appropriate copper cables that are designed for a minimum operating temperature of +90°C for ambient
temperatures between below +60°C and 1+05°C for ambient temperatures up to +70°C. Ensure that all strands of a stranded wire enter
the terminal connection.
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 housing does not provide protection against spilled liquids.
The device is designed for overvoltage category II zones.
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 264Vac.
The device can also be powered from batteries or similar DC sources. The voltage between the input terminals and the PE terminal must
not exceed 180Vdc continuously.
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 not cover ventilation
grid!
The device is designed for altitudes up to 3000m.
Keep the following minimum installation clearances: 50mm on top, 50mm on the bottom, 5mm left and right side. Increase the 5mm to15mm in case the adjacent device is a heat source. When the device is permanently loaded with less than 50%, the 5mm can be reduced
to zero.

Feb. 2024 / Rev. 1.0 DS-CP20.241-M1-EN
All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

3/28

CP20.241-M1
24V, 20A, SINGLE PHASE INPUT

CP-Series

The device is designed, tested and approved for branch circuits up to 32A (IEC) and 30A (UL) without additional protection device. If an
external fuse is utilized, do not use circuit breakers smaller than 10A B- or C-Characteristic to avoid a nuisance tripping of the circuit
breaker.
The maximum surrounding air temperature is +70°C. The operational temperature is the same as the ambient or surrounding air
temperature and is defined 2cm below the device.
The device is designed to operate in areas between 5% and 95% relative humidity.
Portable RF communication equipment should be used no closer than 30cm to the power supply or the power supply connection cables.

WARNINGUse of this equipment adjacent to or stacked with other equipment should be avoided because it could result in improper operation. Ifsuch use is necessary, this equipment and the other equipment should be observed to verify that they are operating normally.
Please note: This device incorporates a single fuse in the L-input. For medical use an additional external fuse in the N-input may benecessary, depending on the type of medical equipment.

Feb. 2024 / Rev. 1.0 DS-CP20.241-M1-EN
All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

4/28

CP20.241-M1
24V, 20A, SINGLE PHASE INPUT

CP-Series

3. AC-INPUT
The device is suitable to be supplied from TN-, TT- and IT mains networks with AC voltage. For suitable DC supply voltages see chapter 4.
-15%/+10%
AC 120-240V-15%/+10%
AC 100-240V
85-264Vac
264-300Vac
Occasionally for maximal 500ms
Max.
300VacContinuous, according to IEC 60664-1
Nom.
50–60Hz
±6%
Typ.
82Vac
Steady-state value, see Fig. 3-1
Typ.
72Vac
Steady-state value, see Fig. 3-1
See recommendations in chapter 2.

Nom.
Nom.

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

Input current
Power factor
Crest factor*)

Typ.
Typ.
Typ.

AC 120V
4.26A
0.996
1.63

Start-up delay
Rise time

Typ.
Typ.

450ms
145ms

450ms
145ms

Typ.

160ms

160ms

Max.

200mV

200mV

Turn-on overshootAC 230V
2.23A
0.980
1.63

At 24V, 20A, see Fig. 3-3
At 24V, 20A, see Fig. 3-4
At 24V, 20A, The crest factor is the mathematical ratioof the peak value 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

Fig. 3-1 Input voltage range

Fig. 3-2 Turn-on behavior, definitions

Rated
input range

Input
Voltage

max.
500ms

Turn-onShut -dow n

POUT

- 5%

OutputVoltage

VIN
85V

Start-up
delay

OvershootAC input voltage Range A
AC input voltage Range B
AC input range

Rise
Time

264V 300Vac

Fig. 3-3 Input current vs. output current at 24V output
voltageFig. 3-4 Power factor vs. output current at 24V output
voltage

Input Current, typ.

Power Factor, typ.

6A

1.0

5

(a)

(a) 120Vac(b) 230Vac

4

(a)
(b)

0.95
0.9

3

(a) 120Vac(b) 230Vac

0.85

2

0.8

1
Output Current

0
2

4

6

8

10

12

14

16

18 20A

Output Current

0.75
2

4

6

8

10

12

Feb. 2024 / Rev. 1.0 DS-CP20.241-M1-EN
All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

14

16

18 20A

5/28

CP20.241-M1
24V, 20A, SINGLE PHASE INPUT

CP-Series

4. DC-INPUT
The device is suitable to be supplied from a DC input voltage. Use a battery or a similar DC source. A supply from the intermediate DCbus of a frequency converter is not recommended and can cause a malfunction or damage the unit.
Connect +pole to L, –pole to N and the PE terminal to an earth wire or to the machine ground.
DC input
DC input range
DC input current
Allowed voltage (+) or (-) input toEarthTurn-on voltage
Shut-down voltage

Nom.

DC 110-150V±20%, derate below 110V acc. to chapter 6: Output
Current, Range B

Typ.

88-180Vdc
4.64A

At 110Vdc, at 24V, 20A

Max.

375VdcContinuous according to IEC 60664-1

Typ.
Typ.

80Vdc
70Vdc

Steady state value
Steady state value

Fig. 4-1 Wiring for DC Input

Battery+

Power Supply
AC
L
N
PE

-

+
Load

DC

Feb. 2024 / Rev. 1.0 DS-CP20.241-M1-EN
All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

6/28

CP20.241-M1
24V, 20A, SINGLE PHASE INPUT

CP-Series

5. INPUT INRUSH CURRENT
An active inrush limitation circuit limits the input inrush current after turn-on of the input voltage.
The charging current into EMI suppression capacitors is disregarded in the first microseconds after switch-on.

Inrush current

AC 120V
12Apeak
10Apeak
1A2s

Max.
Typ.
Max.

Inrush energy

AC 230V
5.5Apeak
4.5Apeak
1A2s

Temperature independent
Temperature independent
Temperature independentFig. 5-1 Typical turn-on behavior at nominal load and
25°C ambient

Input Current 5A / DIV

230VacInput

24Vdc
Output

100mS/DIV

Feb. 2024 / Rev. 1.0 DS-CP20.241-M1-EN
All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

7/28

CP20.241-M1
24V, 20A, SINGLE PHASE INPUT

CP-Series

6. OUTPUT
The output provides a SELV/PELV/ES1 rated voltage, which is galvanically isolated from the input voltage.
The device 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 > 1F are connected to the output, the unit might charge thecapacitor 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.
Max.

24V
24-28V
30V

Guaranteed value
This is the maximum output voltage which can occur at theclockwise end position of the potentiometer due totolerances. It is not a guaranteed value which can beachieved.
24.1V±0.2% at full load, cold unit
10mV
Between 85 and 300Vac input voltage change
100mV
Between 0 and 24A , static value
50mVpp
Bandwidth 20Hz to 20MHz, 50Ohm
20A
At 24V and up to +60°C ambient temperature
15A
At 24V and +70°C ambient temperature
17.1A
At 28V and up to +60°C ambient temperature
13A
At 28V and +70°C ambient temperature
Derate linearly between +60°C and +70°C, see chapter 17

Factory setting output voltage
Line regulation
Load regulation
Ripple and noise voltage
Output current Range A

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

Output current Range B

Nom.
Nom.
Nom.
Nom.

18A
At 24V and up to +60°C ambient temperature
13.5A
At 24V and +70°C ambient temperature
15.4A
At 28V and up to +60°C ambient temperature
9.6A
At 28V and +70°C ambient temperature
Derate linearly between +60°C and +70°C, see chapter 17

Fuse breaking current

Typ.

60A

Max.
Typ.

Continuous current
Intermittent current2)
29.8A
29A

Max.

9.8A

Output capacitanceTyp.

8 500µF

Back-feeding loads

Max.

35V

Overload behavior
Overload/ short-circuit current

Up to 12ms once every five seconds, see Fig. 6-3.
The fuse breaking current is an enhanced transient current
which helps to trip fuses on faulty output branches. The
output voltage stays above 20V.
For output voltage > 13Vdc, see Fig. 6-1
For output voltage < 13Vdc, see Fig. 6-1
Continuous current, see Fig. 6-1
Intermitted current peak value for typ. 2s
Load impedance 10mOhm, see Fig. 6-2
Discharge current of output capacitors is not included.
Intermitted current average value (R.M.S.)
Load impedance 10mOhm, see Fig. 6-2
Included inside the power supply
The unit is resistant and does not show malfunctioning whena load feeds back voltage to the power supply. It does notmatter 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 2s. After this, the output is switched off forapprox. 18s before a new start attempt is automatically performed. This cycle is repeated as long as the overload exists. If the overload has been cleared, thedevice will operate normally. See Fig. 6-2.

Feb. 2024 / Rev. 1.0 DS-CP20.241-M1-EN
All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

8/28

CP20.241-M1
24V, 20A, SINGLE PHASE INPUT

CP-Series

Fig. 6-1 Output voltage vs. output current, typ
Output Vol tage (Single Use, typ.)Adjustment
Range

28V
24
20
16
12

(a)

(a) continuous current(b ) intermitted cu rrent

8
4
0

(b)

Output Current

0

5

10

15

20

25

30A

Fig. 6-2 Short-circuit on output, HiccupPLUS® mode, typ.

Fig. 6-3 Dynamic overcurrent capability, typ.
Output Voltage (dynamic behavior, < 12ms)

28V

OutputCurrent
Normaloperation

Normaloperation

Short -circuit

29A

24
Adjustment
Range

20
16
12

t

0
2s

18s

2s

18s

2s

18s

8
4
0

Output Current

0

10

20

30

40

Feb. 2024 / Rev. 1.0 DS-CP20.241-M1-EN
All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

50

60 70A

9/28

CP20.241-M1
24V, 20A, SINGLE PHASE INPUT

CP-Series

7. HOLD-UP TIME
The hold-up time is the time during which a power supply’s output voltage remains within specification following the loss 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 LED is
also on during this time.

Hold-up TimeAC 120V
65ms
54ms
32ms
24ms

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

AC 230V
65ms
54ms
32ms
24ms

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
Fig. 7-2 Shut-down behavior, definitions

Hold-up Time

Zero Transition

80ms
70
60
50
40
30
20
10
0
85

24V, 10A, typ.
24V, 10A, min.

Input
Voltage

24V, 20A, typ.
24V, 20A, min.

Hold-up Time

Input Voltage

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

As soon as the output voltage reaches typ. 90% of the adjusted output voltage level.
As soon as the output voltage dips more than 10% below the adjusted output voltage.
Short dips will be extended to a signal length of 100ms. Dips shorter than 1ms will be ignored.
1V
Maximal 60Vdc 0.3A, 30Vdc 1A, 30Vac 0.5A, resistive load
Minimal permissible load: 1mA at 5Vdc
See dielectric strength table in chapter 18.

Switching hysteresis
Contact ratings
Isolation voltage

Fig. 8-1 DC-OK relay contact behavior
VOUT = VADJ
10%

<
1ms

open

>
1...4ms

closed0.9* VADJ

100ms

open

closedFeb. 2024 / Rev. 1.0 DS-CP20.241-M1-EN
All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

10/28

CP20.241-M1
24V, 20A, SINGLE PHASE INPUT

CP-Series

9. EFFICIENCY AND POWER LOSSES
Efficiency
Average efficiency*)

Typ.
Typ.

AC 120V
94.2%
93.8%

Power losses

Typ.
Typ.
Typ.

2.2W
15.0W
29.6W

*)

AC 230V
95.6%
95.0%
2.2W
12.5W
22.1W

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 thetime.

Fig. 9-1 Efficiency vs. output current at 24V, typFig. 9-2 Losses vs. output current at 24V, typ.

Efficiency

Power Losses

96%
95
94
93
92
91
90
88
87

30W
25
20
15
10

(a) 1 20Vac(b) 230Vac

Output Current

4

6

8

10

12

14

16

(a) 1 20Vac(b) 230Vac

5
Output Current

0

18

0

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

35

94

30

93

25

92

20
15

91
Input Voltage

90
100 120

180

Input Voltage

10230

264Vac100 120180

Feb. 2024 / Rev. 1.0 DS-CP20.241-M1-EN
All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

230

264Vac11/28

CP20.241-M1
24V, 20A, SINGLE PHASE INPUT

CP-Series

10. FUNCTIONAL DIAGRAM
Fig. 10-1 Functional diagram CP20.241-M1

L
N

Input Fuse
Input Filter
Input Rectifier
Inrush Current Limiter

PFC
ConverterPower
Converter

OutputFilterOutputVoltage
Regulator
Temperature
Shutdown

OutputPower
Manager

OutputOverVoltage
Protection

OutputVoltage
Monitor

VOUT
DC-ok
LED

DC-ok
Relay

Feb. 2024 / Rev. 1.0 DS-CP20.241-M1-EN
All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

+
+
-

DC-ok
Contact

12/28

CP20.241-M1
24V, 20A, SINGLE PHASE INPUT

CP-Series

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

Input Terminals
Quick-connect spring-clamp terminals
N, LLine input
PE (Protective Earth) input

B

Output Terminals
two identical + poles and three identical – poles
Quick-connect spring-clamp terminals+
Positive output–
Negative (return) output

C

Output Voltage Potentiometer
Open the flap to adjust the output voltage. The factory
setting is 24.1V.

D

DC-OK LED (green)
On, when the output voltage is >90% of the adjusted output
voltage

E

DC-OK Relay Contact
The DC-OK relay contact is synchronized with the DC-OK
LED. See chapter 8 for details.

12. CONNECTION TERMINALSThe terminals are IP20 Finger safe constructed and suitable for field- and factory wiring.

Type
Solid wire
Stranded wire
American Wire Gauge
Wire diameter (including ferrules)
Wire stripping length
Screwdriver

Input and Output
Quick-connect spring-clamp terminals
max. 6mm2
max. 4mm2
max. AWG 20-10
max. 2.8mm
10mm-

DC-OK Signal
Push-in terminals
max. 1.5mm2
max. 1.5mm2
max. AWG 28-16
max. 1.6mm
7mm
3mm slotted to open the spring

Feb. 2024 / Rev. 1.0 DS-CP20.241-M1-EN
All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

13/28

CP20.241-M1
24V, 20A, SINGLE PHASE INPUT

CP-Series

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 and is calculated according to thecapacitor’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 120V

AC 230V

60 000h
149 000h
31 000h
169 000h
422 000h
88 000h

94 000h
173 000h
54 000h
265 000h
488 000h
152 000h

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

14. MTBF
MTBF stands for Mean Time Between Failures, which is calculated according to statistical device failures, and indicates reliability of adevice. 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 thatstatistically 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 120V

AC 230V

429 000h
794 000h
197 000h
267 000h
41 000h
54 000h

569 000h
1 012 000h
233 000h
318 000h
49 000h66 000h

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

Feb. 2024 / Rev. 1.0 DS-CP20.241-M1-EN
All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

14/28

CP20.241-M1
24V, 20A, SINGLE PHASE INPUT

CP-Series

15. EMC – ACCORDING TO MEDICAL STANDARDSEMC Immunity
Electrostatic discharge

Electromagnetic RF field

Fast transients (Burst)

Surge voltage on input
Conducted disturbance
Rated power frequency magnetic
fieldsMains voltage dips

Voltage interruptions

According to medical standard: EN 60601-1-2
EN 61000-4-2
Contact discharge
Air discharge
Air discharge DC-OK signal
EN 61000-4-3
80MHz-2.7GHz
EN 61000-4-3,
385MHz-5.78GHz
EN 60601-1-2
table 9EN 61000-4-4
Input lines
Output lines
DC-OK signal (coupling clamp)
EN 61000-4-5
L→N
L → PE, N → PE
EN 61000-4-6
0.15-80MHz
EN 61000-4-8
Frequency 50Hz
Frequency 60Hz
EN 61000-4-11
0% of 100Vac
0% of 100Vac
70% of 100Vac
0% of 240Vac
0% of 240Vac
70% of 240Vac
EN 61000-4-11
0% of 100Vac
0% of 240Vac

8kV
15kV
8kV
10V/m
9-28V/mCriterion A
Criterion A
Criterion A
Criterion A
Criterion A

2kV
1kV
1kV
1kV
2kV
6V
30A/m
30A/m
0Vac, 10ms
0Vac, 20ms
70Vac, 500ms
0Vac, 10ms
0Vac, 20ms
168Vac, 500ms
0Vac, 5000ms
0Vac, 5000ms

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 A
Criterion B
Criterion B

Criterions:
A: Power supply shows normal operation behavior within the defined limits.
B: Output voltage out of range or switches off. DC-OK signal might trigger. Restores automatically after the test.

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

Switching Frequencies
Switching frequency 1
Switching frequency 2
Switching frequency 3

According to medical standard: EN 60601-1-2
EN 55011, CISPR 11
Class B for AC Input voltages and Class A for DC input
voltages
EN 55011, CISPR 11
Class BEN 61000-3-2Class A fulfilled between 0A and 12A load
Class C fulfilled between 6A and 12A load
EN 61000-3-3
Fulfilled*)

The power supply has three converters with two different switching frequencies included.
110kHzPFC converter
84kHz to 140kHz
Main converter, output power dependent
60kHz
Auxiliary converter

Feb. 2024 / Rev. 1.0 DS-CP20.241-M1-EN
All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

15/28

CP20.241-M1
24V, 20A, SINGLE PHASE INPUT

CP-Series

16. EMC – ACCORDING TO GENERIC STANDARDSIn regard to EMC, the power supply is designed for applications in medical applications, industrial environment as well as in residential,commercial and light industry environment.
The device is investigated according to EN 61000-6-1, EN 61000-6-2, EN 61000-6-3 and EN 61000-6-4.
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 Signals
Conducted disturbance
Mains voltage dips

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

Voltage interruptions
Voltage sags

EN 61000-4-11
SEMI F47

Powerful transients

VDE 0160

Contact discharge
8kV
Air discharge
15kV
80MHz-2.7GHz
20V/m
Input lines
4kV
Output lines
2kV
DC-OK signal (coupling clamp)
2kV
L→N
2kV
L → PE, N → PE
4kV
+→1kV
+ / - → PE
2kV
DC-OK signal → PE
1kV
0.15-80MHz
20V
0% of 100Vac
0Vac, 20ms
40% of 100Vac
40Vac, 200ms
70% of 100Vac
70Vac, 500ms
0% of 200Vac
0Vac, 20ms
40% of 200Vac
80Vac, 200ms
70% of 200Vac
140Vac, 500ms
0% of 200Vac
0Vac, 5000ms
dips on the input voltage according to SEMI F47 standard
80% of 120Vac (96Vac)
1000ms70% of 120Vac (84Vac)
500ms
50% of 120Vac (60Vac)
200ms
Over entire load range
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
Criterion A
Criterion A
Criterion A

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

EMC Emission
Conducted emission
input lines
Conducted emission
output lines**)Radiated emission
Harmonic input current

EN 55011, EN 55015, EN 55032,
FCC Part 15, CISPR 11, CISPR 32
IEC/CISPR 16-1-2, IEC/CISPR 16-2-1
EN 55011, EN 55032
EN 61000-3-2Class B for AC Input voltages and Class A for DC
input voltages
8dB higher than average limits for DC power
port according to EN 61000-6-3**)Class BClass A fulfilled between 0A and 12A load
Class C fulfilled between 6A and 12A load
Fulfilled*)

Voltage fluctuations, flicker
EN 61000-3-3This device complies with FCC Part 15 rules.
Operation is subjected to following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept
any interference received, including interference that may cause undesired operation.
*) Tested with constant current loads, non pulsing**) For information only, not mandatory for EN 61000-6-3 or EN 61000-6-4
Restrictions apply only for applications in residential, commercial and light-industrial environments, where local DC power networks according to EN 61000-63 are involved. No restrictions for all kinds of industrial applications.

Feb. 2024 / Rev. 1.0 DS-CP20.241-M1-EN
All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

16/28

CP20.241-M1
24V, 20A, SINGLE PHASE INPUT

CP-Series

17. ENVIRONMENT
Operational temperature*)
Non-operational temperature
Output derating
Humidity**)-25°C to +70°C-40°C to +85°C
12W/K
5 to 95% r.h.

Atmospheric pressure
Vibration sinusoidal

110-70kPa
2-17.8Hz: ±1.6mm; 17.8-500Hz: 2g***)2 hours / axis***)30g 6ms, 20g 11ms***)IEC 60068-2-27
3 bumps / direction, 18 bumps in total
Up to 3000m
See Fig. 17-2 for details
1.33A/1000m or 5K/1000m
For altitudes >2000m, see Fig. 17-2
The derating is not hardware controlled. The user has to take this into consideration to stay below thederated current limits in order not to overload the unit.
III
Altitudes up to 2000m according to IEC/EN 62477-1

Shock
Altitude
Altitude derating

Over-voltage category*)

Reduce output power according Fig. 17-1
For storage and transportation
Between 60°C and 70°C
For operation, storage and transportation according
to IEC 60068-2-30
For operation, storage and transportation
IEC 60068-2-6

Operational temperature is the same as the ambient or surrounding temperature and is defined as the air temperature 2cm below the unit.

**) Do not energize while condensation is present***) Tested in combination with DIN rails according to EN 60715 with a height of 15mm and a thickness of 1.3mm and standard orientation

Fig. 17-1 Output current vs. ambient temp.

Fig. 17-2 Output current vs. altitude
Allowed O utput Current at 24V

Allowed O utput Current at 24V
(b)

20A

(a)

(b)
(a)

20A
18.6A

15A
(a) 90 to 2 64Vac, continuou s(b) short term(max. 60s eve ry 10 minutes)

0
-25

0

45

60 70°C

Altitude 0mAP*) 110kPa

2000m 3000m
80kPa 70kPa*) Atmospheric pressure

Feb. 2024 / Rev. 1.0 DS-CP20.241-M1-EN
All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

17/28

CP20.241-M1
24V, 20A, SINGLE PHASE INPUT

CP-Series

18. SAFETY AND PROTECTION FEATURES
Input / output separation1)

SELV
IEC/EN 61010-2-201
PELV
IEC/EN 60204-1, IEC/EN 62477-1, IEC 60364-4-41
double or reinforced insulation

Transformers

Safety Isolating Transformers corresponding to Part
2-6 of the IEC/EN 61558

min.
max.

Safety Isolating
Transformers
acc. IEC/EN 61558-2-16
I
500MOhm
0.1Ohm

typ.
max.
typ.
max.

0.39mA0.47mA0.65mA0.78mA

264Vac, 60Hz, normal condition
264Vac, 60Hz, normal condition
264Vac, 60Hz, single fault condition
264Vac, 60Hz, single fault condition

typ.
max.
typ
max.

0.01mA
0.02mA0.40mA
0.48mA

264Vac, 60Hz, normal condition
264Vac, 60Hz, normal condition
264Vac, 60Hz, single fault condition
264Vac, 60Hz, single fault condition

typ.
max.
typ.
max.

0.04mA
0.05mA0.40mA
0.48mA

264Vac, 60Hz, normal condition
264Vac, 60Hz, normal condition
264Vac, 60Hz, single fault condition
264Vac, 60Hz, single fault condition

typ.
max.
typ.
max.

0.04mA
0.05mA0.40mA
0.48mA

264Vac, 60Hz, normal condition
264Vac, 60Hz, normal condition
264Vac, 60Hz, single fault condition
264Vac, 60Hz, single fault condition

Class of protection
Insulation resistancePE resistance
Earth leakage current2) 3), medical

Touch current2) 3), medical,
Mains to enclosure

Touch current2) 3), medical,
Mains to output GND (-) pole

Touch current2) 3), medical,
Mains to output plus (+) pole

1)
2)
3)

PE (Protective Earth) connection required
Input to output, measured with 500Vdc
PE terminal to enclosure

Double or reinforced insulation
After humidity preconditioning treatment
No classification according class B, BF and CF since the power supply is not suitable for application parts with direct patient contact.

Feb. 2024 / Rev. 1.0 DS-CP20.241-M1-EN
All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

18/28

CP20.241-M1
24V, 20A, SINGLE PHASE INPUT

CP-Series

19. DIELECTRIC STRENGTH
The output voltage is floating and has no ohmic connection to the ground. Type and factory tests are conducted by the manufacturer.
Field tests may be conducted in the field using the appropriate test equipment which applies the voltage with a slow ramp (2s up and 2sdown). Connect all input-terminals 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.
Type test

60s

A
3000Vac

B
4500Vac

C
1500Vac

D
500Vac13

Factory test

5s

3000Vac

4000Vac

1000Vac

500Vac14

Field test

5s

2700Vac

3500Vac

800Vac

500VacCut-off current setting> 10mA

> 5mA

> 5mA

> 1mA

Fig. 19-1 Dielectric strength

Input
L
N

B

A

DC-ok
B* )

D
OutputEarth, PEC+B*) When testing input to DC-OK ensure that the max. voltage between DC-OK and the output is not exceeded (column D). We recommend connecting DC-OK
pins and the output pins together when performing the test.

Insulation Safety Ratings
Input to Ground
Input to Output
Output to Ground

MOPP, MOOP
2MOPP, 2MOOP
MOPP, MOOP

Feb. 2024 / Rev. 1.0 DS-CP20.241-M1-EN
All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

19/28

CP20.241-M1
24V, 20A, SINGLE PHASE INPUT

CP-Series

20. APPROVED, FULFILLED OR TESTED STANDARDSIEC 60601-1

IEC 60068-2-60

CB Scheme,
Medical electrical equipment – Part 1: General requirements for basic
safety and essential performance
2MOPP and 2MOOP(Except risk assessment)
Manufacturer's Declaration (Online Document)
Environmental Tests, Flowing Mixed Gas Corrosion Test
Test Ke - Method 4
H2S: 10ppb
NO2: 200ppb
Cl2: 10ppb
SO2: 200ppb
Test Duration: 3 weeks, which simulates a service life of 10 years.

ISA-71.04 G3

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 10 years

VDMA 24364

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

21. REGULATORY PRODUCT COMPLIANCE
EU Declaration of Conformity

REACH Regulation (EU)

WEEE Regulation

The CE mark indicates conformance with the- EMC directive- Low-voltage directive- RoHS directive
Manufacturer's Statement
EU regulation regarding the Registration, Evaluation, Authorisation andRestriction of Chemicals (REACH) fulfilled.
Manufacturer's Declaration
EU Regulation on Waste Electrical and Electronic Equipment
Registered as business to business (B2B) products.
EU Regulation 2012/19/EU

Feb. 2024 / Rev. 1.0 DS-CP20.241-M1-EN
All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

20/28

CP20.241-M1
24V, 20A, SINGLE PHASE INPUT

CP-Series

22. PHYSICAL DIMENSIONS AND WEIGHT
Width
HeightDepth
WeightDIN rail
Housing material
Installation clearances
Penetration protection

48mm
124mm
127mm
The DIN rail depth must be added to the unit depth to calculate the total required installation depth.
830g
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 5mm
Fig. 22-1 Front viewFig. 22-2 Side viewAll dimensions in mm

All dimensions in mm

Feb. 2024 / Rev. 1.0 DS-CP20.241-M1-EN
All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

21/28

CP20.241-M1
24V, 20A, SINGLE PHASE INPUT

CP-Series

23. ACCESSORIES
23.1. ZM10.WALL - WALL/PANEL MOUNT BRACKETThis bracket is used to mount the devices on a wall/panel without utilizing the DIN rail. The bracket can be mounted without detaching
the DIN rail brackets from the power supply. PSU for illustration purpose only.
Fig. 23-1 Isometric viewFig. 23-4 Wall/panel mounting, side

Fig. 23-2 Isometric viewFig. 23-5 Hole pattern for wall mounting

Fig. 23-3 Isometric viewFig. 23-6 Wall/panel mounting, side view

view

4

4

4
.

14
1 6

14

(4 )

6

1

Feb. 2024 / Rev. 1.0 DS-CP20.241-M1-EN
All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

22/28

CP20.241-M1
24V, 20A, SINGLE PHASE INPUT

CP-Series

23.2. ZM12.SIDE - SIDE MOUNTING BRACKETThis bracket is used to mount the device sideways with or without utilizing a DIN rail.
The two aluminum brackets and the black plastic slider of the unit have to be detached, so that the steel brackets can be mounted.
For sideway DIN rail mounting, the removed aluminum brackets and the black plastic slider need to be mounted on the steel bracket.
Fig. 23-7 ZM12.SIDE Side mounting bracket*)*)Fig. 23-8 Side mounting with DIN rail brackets*)

PSU for illustration purpose only.

Feb. 2024 / Rev. 1.0 DS-CP20.241-M1-EN
All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

23/28

CP20.241-M1
24V, 20A, SINGLE PHASE INPUT

CP-Series

24. APPLICATION NOTES
24.1. PEAK CURRENT CAPABILITY
The unit can deliver peak currents (up to several milliseconds) which are higher than the specified short-term currents.
This helps to start current demanding loads. Solenoids, contactors and pneumatic modules often have a steady state coil and a pick-up
coil. The inrush current demand of the pick-up coil is several times higher than the steady-state current and usually exceeds the nominal
output current. The same situation applies when starting a capacitive load.
The peak current capability also ensures the safe operation of subsequent circuit breakers of load circuits. The load branches are often
individually protected with circuit breakers or fuses. In case of a short or an overload in one branch circuit, the fuse or circuit breakerneed a certain amount of over-current to open in a timely manner. This avoids voltage loss in adjacent circuits.
The extra current (peak current) is supplied by the power converter and the built-in large sized output capacitors of the power supply.
The capacitors get discharged during such an event, which causes a voltage dip on the output. The following three examples show
typical voltage dips for resistive loads:
Fig. 24-1 40A peak current for 50ms, typ.
(2x the nominal current)

Fig. 24-2 100A peak current for 5ms, typ.
(5x the nominal current)

24V

OutputVoltage

24V

OutputVoltage

17V

100A

16V
OutputCurrent

40A
OutputCurrent

0A

0A

10ms/DIV

1ms/DIV

Fig. 24-3 60A peak current for 12ms, typ.
(3x the nominal current)

24V
20V
60A
Output Voltage
12ms

Output Current

0A

Please note: The DC-OK relay might trigger when the voltage dips
more than 10% for longer than 1ms.

Peak current voltage dips

Typ.
Typ.
Typ.

from 24V to 16Vfrom 24V to 21Vfrom 24V to 17V

At 40A for 50ms, resistive load
At 100A for 2ms, resistive load
At 100A for 5ms, resistive load

Feb. 2024 / Rev. 1.0 DS-CP20.241-M1-EN
All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

24/28

CP20.241-M1
24V, 20A, SINGLE PHASE INPUT

CP-Series

24.2. OUTPUT CIRCUIT BREAKERS
Standard miniature circuit breakers (MCB’s or UL 1077 circuit breakers) are commonly used for AC-supply systems and may also be usedon 24V branches.
MCB’s are designed to protect wires and circuits. If the ampere value and the characteristics of the MCB are adapted to the wire sizethat is used, the wiring is considered as thermally safe regardless of whether the MCB opens or not.
To avoid voltage dips and under-voltage situations in adjacent 24V branches which are supplied by the same source, a fast (magnetic)
tripping of the MCB is desired. A quick shutdown within 10ms is necessary corresponding roughly to the ride-through time of PLC's. Thisrequires power supplies with high current reserves and large output capacitors. Furthermore, the impedance of the faulty branch mustbe sufficiently small in order for the current to actually flow. The best current reserve in the power supply does not help if Ohm’s law
does not permit current flow. The following table has typical test results showing which B- and C-Characteristic MCBs magnetically trip
depending on the wire cross section and wire length.
Fig. 24-4 Test circuit

Power Supply

AC

MCB

Load

+

+
Wire length

S1

DC -

2.5mm²
98 m

C-3A
C-4A
C-6A

28 m
18 m
9m

34 m
25 m
11 m

51 m
38 m
18 m

78 m
58 m
26 m

C-8A
C-10A

6m
4m

7m
6m

12 m
11 m

14 m
13 m

C-13A

2m

2m

4m

7m

B-6A

23 m

28 m

46 m

66 m

B-10A
B-13A

11 m
7m

14 m
11 m

19 m
16 m

32 m
29 m

B-16A
B-20A
B-25A

5m
1m

6m
1m

8m
2m

15 m
4m
1m

-

S1... Fault simulation switch*)

Maximal wire length*) for a fast (magnetic) tripping:
0.75mm²
1.0mm²1.5mm²
C-2A
31 m
37 m
63 m

Don’t forget to consider twice the distance to the load (or cable length) when calculating the total wire length (+ and – wire).

24.3. CHARGING OF BATTERIESThe power supply can be used to charge lead-acid or maintenance free batteries (SLA or VRLA batteries). Two 12V batteries are neededin series.
Instructions for charging batteries:a)

Set output voltage (measured at no load and at the battery end of the cable) very precisely to the end-of-charge voltage.

End-of-charge voltage

27.8V

27.5V

27.15V

26.8V

Battery temperature

10°C

20°C

30°C

40°C

b)

Use a 15A or 16A circuit breaker (or blocking diode) between the power supply and the battery.

c)Ensure that the output current of the power supply is below the allowed charging current of the battery.

d)Use only matched batteries when putting 12V types in series.

e)

Ensure that the ambient temperature of the power supply stays below 40°C.

f)

The return current to the power supply (battery discharge current is typ. 3.5mA when the power supply is switched off (except
in case a blocking diode is utilized).

Feb. 2024 / Rev. 1.0 DS-CP20.241-M1-EN
All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

25/28

CP20.241-M1
24V, 20A, SINGLE PHASE INPUT

CP-Series

24.4. SERIES OPERATION
Do not use multiple power supplies in series. The leakage current will be too high to meet the medical requirements.

24.5. PARALLEL USE TO INCREASE OUTPUT POWER
Do not use multiple power supplies in parallel. The leakage current will be too high to meet the medical requirements.

24.6. PARALLEL USE FOR REDUNDANCYDo not use multiple power supplies in parallel. The leakage current will be too high to meet the medical requirements.

24.7. INDUCTIVE AND CAPACITIVE LOADSThe unit 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 larger than 1. F are connected to the output, the unit might charge
the capacitor in the HiccupPLUS mode

24.8. OPERATION ON TWO PHASESPower Supply

The power supply can also be used on two-phases of a three-phase-system. Such aphase-to-phase connection is allowed if the supplying voltage is below 240V+10%.

240V +10% max.

L1

Ensure that the wire, which is connected to the N-terminal, is appropriately fused.
The maximum allowed voltage between a Phase and the PE must be below 300Vac.

L3

24.9. USE IN A TIGHTLY SEALED ENCLOSURE

AC
L
N
PE

L2

DC

When the device is installed in a tightly sealed enclosure, the temperature inside the enclosure will be higher than outside. In suchsituations, the inside temperature defines the ambient temperature for the device.
In the following test setup, the device is placed in the middle of the box, no other heat producing items are inside the box. The load isplaced outside 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.

Input voltage

Case A
180x180x165mm
Rittal Typ IP66 Box
PK 9519 100,plastic
230VacCase B
180x180x165mm
Rittal Typ IP66 Box
PK 9519 100,plastic
230VacLoadTemperature inside the box
Temperature outside the box
Temperature rise

24V, 16A; (=80%)
51.7°C
25.9°C
25.8K

24V, 20A; (=100%)55.8°C
25.6°C
30.2K

Enclosure size

Feb. 2024 / Rev. 1.0 DS-CP20.241-M1-EN
All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

26/28

CP20.241-M1
24V, 20A, SINGLE PHASE INPUT

CP-Series

24.10. MOUNTING ORIENTATIONSMounting orientations other than input terminals on the bottom and output on the top require a reduction in continuous output power
or a limitation in the maximum allowed ambient temperature.
The listed lifetime and MTBF values from this datasheet apply only for the standard mounting orientation.
The test environment is set up installing wiring ducts (depth: 80mm) with clearances seen in chapter 2.
The following curves give an indication for allowed output currents for altitudes up to 2000m.
Curve A: AC Input voltage Range A (120-240V)
Curve B: AC Input voltage Range B (100-240V)

Fig. 24-5
Mounting
Orientation A(Standardorientation)

Output Current

20A
18
15
13.5
10
5
Ambient Temperature

010Fig. 24-6
Mounting
Orientation B(Upside down)

20

30

40

50

60

70°C

60

70°C

60

70°C

Output Current

20A
18
15
13
10
5
Ambient Temperature

010Fig. 24-7
Mounting
Orientation C(Table-top
mounting)

20

30

40

50

Output Current

20A
18
15
12
11
5
Ambient Temperature0
10

20 25 30

Feb. 2024 / Rev. 1.0 DS-CP20.241-M1-EN
All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

40

50

27/28

CP20.241-M1
24V, 20A, SINGLE PHASE INPUT

CP-Series

Fig. 24-8
Mounting
Orientation D(Horizontal cw)

Output Current

20A
18
15
13
11
5
Ambient Temperature

010Fig. 24-9
Mounting
Orientation E(Horizontal ccw)

20 25 30

40

50

60

70°C

60

70°C

Output Current

20A
18
15
13
11
5
Ambient Temperature0
10

20 25 30

Feb. 2024 / Rev. 1.0 DS-CP20.241-M1-EN
All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

40

50

28/28