CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

CP-Series

REDUNDANCY POWER SUPPLY














AC 100-240V wide-range input
Width only 48mm
Built-in decoupling MOSFET for 1+1 and N+1 redundancy
Efficiency up to 95.2%
20% output power reserves (PowerBoost)
Safe HiccupPLUS Overload Mode
Easy fuse breaking– 3 times nominal current for 12ms
Active Power Factor Correction (PFC)
Minimal inrush current surge
Full power between -40°C and +60°C
DC-OK relay contact
Current sharing feature included
3 year warranty

PRODUCT DESCRIPTIONSHORT-FORM DATAThe Dimension CP-Series are cost optimized power
supplies without compromising quality, reliability andperformance. The most outstanding features of theCP20.241–R1/-R2 units are the high efficiency, electronic
inrush current limitation, active PFC, wide operationaltemperature range and the extraordinary small size. The
units include a decoupling MOSFET for building 1+1 or
N+1 redundant power supply systems. The devices alsooffer PowerBoost: Power reserves of 20%, which may
even be used continuously at temperatures up to +45°C.

Output voltage
Adjustment range
Output current

These redundancy power supplies come with threeconnection terminal options; screw terminals, springclamp terminals or plug connector terminals whichallows replacement on an active application.
CP20.242-R2 version feature an enhanced DC input
voltage range and the CP20.241-R2-C1 is additionallyequipped with conformal coated pc-boards.
With high immunity to transients and power surges, lowelectromagnetic emission, a DC-OK signal contact for
remote monitoring, and a large international approval
package, makes this unit suitable for nearly every
application.

PowerBoost

AC Input voltage
Mains frequency
AC Input current
Power factor
Input voltage DC
Input current DC
AC Inrush current
Efficiency
LossesHold-up time
Temperature range
Size (w x h x d)
WeightDC 24V
Nominal
20A
Up to +60°C ambient
15A
At +70°C ambient
Derate linearly between +60°C and
+70°C
24A
Up to +45°C ambient
Linear decrease to nominal power
between +45°C and +60°C
AC 100-240V-15%/+10%
50-60Hz±6%
4.28 / 2.25A
At 120 / 230Vac
0.99 / 0.98
At 120 / 230Vac
DC 110-150V±20% For CP20.241-xx
DC 110-300V±20% For CP20.242-xx
4.64A / 1.66A
At 110 / 300Vdc
10 / 4.5Apeak
At 120 / 230Vac
93.8 / 95.2%
At 120 / 230Vac
31.7 / 24.2W
At 120 / 230Vac
32 / 32ms
At 120 / 230Vac-40°C to +70°C
48x124x127mm Without DIN rail andplug connectors
830g
CP20.241-R1
850g
CP20.24x-R2

ORDER NUMBERS

MAIN APPROVALSPower Supplies
CP20.241-R1

For details or a complete approval list see chapter 20.

With quick-connect spring-clamp
terminals
CP20.241-R2
With hot swappable plugconnectors (preferred item)
CP20.242-R2
Enhanced DC-Input
CP20.241-R2-C1 With conformal coated pc boards

Accessory
ZM10.WALLUL 61010-2-201

Wall/panel mount bracket

Jul. 2024 / Rev. 1.2 DS-CP20.241-R2-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

1/33

CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

CP-Series

INDEX
Page
1. Intended Use .......................................................4
2. Installation Requirements ...................................4
3. AC-Input...............................................................6
4. DC-Input...............................................................7
5. Input Inrush Current ...........................................8
6. Output .................................................................9
7. Hold-up Time .....................................................10
8. DC-OK Relay Contact ........................................11
9. Efficiency and Power Losses..............................12
10. Lifetime Expectancy ..........................................13
11. MTBF ..................................................................13
12. Functional Diagram...........................................14
13. Terminals and Wiring ........................................15
14. Replacing Units while the System is Running ..16
15. Front Side and User Elements ...........................17
16. EMC ....................................................................18
17. Environment ......................................................19
18. Safety and Protection Features ........................20Page
19. Dielectric Strength............................................ 21
20. Approved, Fulfilled or Tested Standards......... 22
21. Regulatory Product Compliance ...................... 23
22. Physical Dimensions and Weight ..................... 24
23. Accessories ........................................................ 26
23.1. ZM10.WALL - Wall/Panel Mount Bracket 26
24. Application Notes ............................................. 27
24.1. Peak Current Capability ........................... 27
24.2. Adjusting the Output Voltage ................. 28
24.3. Charging of Batteries ............................... 29
24.4. Output Circuit Breakers............................ 29
24.5. Series Operation ....................................... 30
24.6. Parallel Use to Increase Output Power .... 30
24.7. Parallel Use for Redundancy .................... 31
24.8. Operation on Two Phases ........................ 32
24.9. Use in a Tightly Sealed Enclosure ............ 32
24.10. Mounting Orientations ............................ 33

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.
No part of this document may be reproduced or utilized in any form without our prior permission in writing.

Jul. 2024 / Rev. 1.2 DS-CP20.241-R2-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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CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

CP-Series

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 (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.

1+1 Redundancy

Use of two identical power supplies in parallel to provide continued operation following most
failures in a single power supply. The two power supply outputs should be isolated from eachother by utilizing diodes or other switching arrangements. E.g. two 20A power supplies areneeded to achieve a 20A
N+1
1+1
redundant system.

N+1 Redundancy

Use of three or more identical
AC
AC
AC
AC
AC
AC
AC
AC
power supplies in parallel toCP20-Rx
CP20-Rx
CP20-Rx
CP20-Rx
CP20-Rx
CP20-Rx
CP20-Rx
CP20-Rx
provide continued operation
following most failures in a
DC
DC
DC
DC
DC
DC
DC
DC
single power supply. All power
supply outputs should be
isolated from each other byutilizing diodes or other
Load
Load
switching arrangements.
E.g.: To achieve a 80A redundant system, five 20A power supplies are needed in a N+1
redundant system.

Redundancy++

Redundancy

Jul. 2024 / Rev. 1.2 DS-CP20.241-R2-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

3/33

CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

CP-Series

1. INTENDED USEThis device is designed for installation in an enclosure and is intended for the general professional use such as inindustrial control, office, communication, and instrumentation equipment.
Do not use this power supply in equipment, where malfunction may cause severe personal injury or threaten humanlife.

2. INSTALLATION REQUIREMENTSWARNING

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

- Do not use the power supply without proper grounding (Protective Earth). Use the terminal on the input block forearth connection and not one of the screws on the housing.
- Turn power off before working on the device. Protect against inadvertent re-powering.
- Make sure that the wiring is correct by following all local and national codes.
- Do not modify or repair the unit.
- Do not open the unit as high voltages are present inside.
- 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 requirements:- This device may only be installed and put into operation by qualified personnel.
- Install the device in an enclosure providing protection against electrical, mechanical and fire hazards.
- The device is designed for use in pollution degree 2 areas in controlled environments.
- The enclosure of the device provides a degree of protection of IP20 according to IEC 60529.
- Mount the unit on a DIN rail so that the input terminals are located on the bottom of the unit. For other mounting
orientations see derating requirements in this document.
- The device is designed for convection cooling and does not require an external fan. Do not obstruct airflow and do
not cover ventilation grid (e.g. cable conduits) by more than 15%!
- Keep the following installation clearances: 40mm on top, 20mm on the bottom, 5mm on the left and right sides arerecommended when the device is loaded permanently with more than 50% of the rated power. Increase thisclearance to 15mm in case the adjacent device is a heat source (Example: another power supply).
- 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 +60°C and 90°C for ambient temperatures up to +70°C. Ensure that all strands of a stranded wire
enter the terminal connection. Check also local codes and local requirements. In some countries local regulations
might apply.
- 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 thedevice to the factory for inspection.
- The device is designed, tested and approved for branch circuits up to up to 30A (UL) or 32A (IEC) without additional
protection device. If an external fuse is utilized, do not use circuit breakers smaller than 10A B- or C-Characteristic toavoid a nuisance tripping of the circuit breaker.
- A disconnecting means shall be provided for the input of the power supply.

Jul. 2024 / Rev. 1.2 DS-CP20.241-R2-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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CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

CP-Series
Notes for use in hazardous location areas:

The power supply is suitable for use in Class I Division 2 Groups A, B, C, D locations. See chapter 20 for details.
WARNING EXPLOSION HAZARDS!
Substitution of components may impair suitability for this environment. Do not disconnect the unit or operate thevoltage adjustment unless power has been switched off or the area is known to be non-hazardous.
Wiring must be in accordance with Class I, Division 2 wiring methods of the National Electrical Code, NFPA 70, and inaccordance with other local or national codes.
A suitable enclosure must be provided for the end product which has a minimum protection of IP54 and fulfils therequirements of the EN 60079-0.

Jul. 2024 / Rev. 1.2 DS-CP20.241-R2-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

5/33

CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

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.

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

Nom. AC 100-240V
Min.
85-264Vac
Min.
264-300Vac
For maximal 500ms (occasional)
Max.
300VacContinuous, according to IEC 62477-1
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.

Input current
Power factor
Crest factor

Typ.
Typ.
Typ.

AC 100V
5.17A
0.996
1.65

AC 120V
4.28A
0.996
1.63

AC 230V
2.25A
0.980
1.63

Start-up delay
Rise time

Typ.
Typ.

450ms
145ms

450ms
145ms

450ms
145ms

Typ.

160ms

160ms

160ms

Max.

1000mV

1000mV

1000mV

Turn-on overshootFig. 3-1 Input voltage range

Rated
input range

Fig. 3-2 Turn-on behavior, definitions

Input
Voltage

max.
500ms

Turn-onShut-down

POUT

a

5

b

4
3
2

Output Current

0
2

4

6

Power Factor, typ.

1.0

a, b
c

0.95
0.9

c

1

Rise
Time

Fig. 3-4 Power factor vs. output current

6Aa) 100Vacb) 120Vacc) 230Vac

Start-up
delay

264V 300Vac

Fig. 3-3 Input current vs. output current
Input Current, typ.

- 5%

OutputVoltage

VIN
85V

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

OvershootAC input
AC input range

8 10 12 14 16 18 20 22 24Aa) 100Vacb) 120Vacc) 230Vac

0.85
0.8
0.75

Output Current

2

4

6

8 10 12 14 16 18 20 22 24A

Jul. 2024 / Rev. 1.2 DS-CP20.241-R2-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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CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

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 theintermediate DC-bus 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

Nom.
Nom.
Min.

DC input range
DC input current
Allowed Voltage (+) or (-) input
to Earth
Turn-on voltage
Shut-down voltage

Typ.
Typ.
Max.

DC 110-150V
DC 110-300V
88-180Vdc
88-360Vdc
4.64A
1.66A
375Vdc±20% for CP20.241-Rx±20% for CP20.242-Rx
For CP20.241-Rx
For CP20.242-Rx
At 110Vdc and 20A load current
At 300Vdc and 20A load current
Continuous according to IEC 62477-1

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

Jul. 2024 / Rev. 1.2 DS-CP20.241-R2-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

7/33

CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

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
Inrush energy

Max.
Typ.
Max.

AC 100V
15Apeak
12Apeak
1A2s

AC 120V
12Apeak
10Apeak
1A2s

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

Jul. 2024 / Rev. 1.2 DS-CP20.241-R2-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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CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

CP-Series

6. OUTPUT
The output provides a SELV/PELV/ES1 rated voltage, which is galvanically isolated from the input voltage. The outputof the devices includes a decoupling MOSFET for building 1+1 or N+1 redundant power supply systems.
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 the capacitor in the HiccupPLUS mode.
The device is featured with a “soft output regulation characteristic” in order to achieve current share between
multiple devices when they are connected in parallel. The “soft output regulation characteristic” regulates the output
voltage in such a manner that the voltage at no load is approx. 4% higher than at nominal load.
Output voltage
Adjustment range
Factory settings
Line regulation
Load regulation
Ripple and noise voltage
Output current

PowerBoost1)

Fuse breaking current2)
Overload protection

Overload behaviour
Overload/ short-circuit current

Output capacitanceBack-feeding loads

Nom.

DC 24VSee chapter 24.2
24.1V

23.8 - 25.2V

35V

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

±0.2%, at 20A, cold unit (results to typ. 23.9V±0.2% at
24A and typ. 25.1V±0.2% at no load)
Max.
10mV
85-300Vac
Typ.
1000mV
Static value, 0A  20A; see Fig. 6-1
Max.
100mVpp20Hz to 20MHz, 50Ohm
Nom. 20A
Up to +60°C ambient temperature, see Fig. 17-1
Nom. 15A
At +70°C ambient temperature, see Fig. 17-1
Derate linearly between +60°C and +70°C, see chapter 17
Nom. 24A
Up to +45°C ambient, see Fig. 17-1
PowerBoost decreases linearly to nominal power between +45°C and +60°C, seechapter 17
Typ.
60A
Up to 12ms once every five seconds, see Fig. 6-3.
Electronically protected against overload, no-load
Includedand short-circuits. In case of a protection event,
audible noise may occur.
Continuous current
Output voltage above 13Vdc, see Fig. 6-1
Intermitted current3) Output voltage below 13Vdc, see Fig. 6-1
Max.
29.8A
Continuous current, see Fig. 6-1
Typ.
29A
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.)
Max.
9.8A
Load impedance 10mOhm, see Fig. 6-2
Typ.
8 000µF
Included inside the power supplyMax.

1) Power Boost
This power/ current is continuously allowed up to an ambient temperature of +45°C.
Above +45°C, do not use this power or current longer than a duty cycle of 10% and/ or not longer than 1 minute every 10 minutes.
2) The fuse braking current is an enhanced transient current which helps to start heavy loads or to trip fuses on faulty output branches. The
output voltage stays above 20V. See chapter 24.1 for additional measurements.
3) At heavy overloads (when output voltage falls below 13V), the power supply delivers continuous output current for 2s. After this, theoutput is switched off for approx. 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, the device will operate normally. See Fig. 6-2.

Jul. 2024 / Rev. 1.2 DS-CP20.241-R2-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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CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

CP-Series

Fig. 6-1 Output voltage vs. output current, typ.

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

Output Voltage

28V

OutputCurrent

24
20

A

Normaloperation

Normaloperation

Short -circuit

29A

16
12
A: continuous current
B: intermitted current

8
4
0

B

2s

Output Current

0

5

10

15

20

25

t

0
18s

2s

18s

2s

18s

35 40A

30

Fig. 6-3 Dynamic overcurrent capability, typ.

Output Voltage (dynamic behavior, < 12ms)

28V
24
20
16
12
8
4
0

Output Current

20

10

0

30

40

60

50

70A

7. HOLD-UP TIME
Hold-up Time

Typ.
Min.
Typ.
Min.

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

AC 100V
65ms
54ms
32ms
24ms

AC 120V
65ms
54ms
32ms
24ms

AC 230V
65ms
54ms
32ms
24ms

Fig. 7-2 Shut-down behavior, definitions

Hold-up Time

80ms
70
60
50
40
30
20
10
0

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

Zero Transition
10A, typ.
10A, min.

Input
Voltage

20A, typ.
20A, min.

Hold-up Time

Input Voltage

85

120

155

190

- 5%

OutputVoltage

230VacJul. 2024 / Rev. 1.2 DS-CP20.241-R2-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

10/33

CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

CP-Series

8. DC-OK RELAY CONTACT
This feature monitors the output voltage of the power supply in front of the decoupling device (see also chapter 12).
Contact closes
Contact opens

As soon as the output voltage reaches typ. 22Vdc.
As soon as the output voltage dips below 22Vdc.
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 19.

Switching hysteresis
Contact ratings
Isolation voltage

Fig. 8-1 DC-OK relay contact behavior

22Vdc
<
1ms

open

>
1...4ms

closed

100ms

open

closedJul. 2024 / Rev. 1.2 DS-CP20.241-R2-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

11/33

CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

CP-Series

9. EFFICIENCY AND POWER LOSSES
Efficiency
Average efficiency*)
Power losses

*)

Typ.
Typ.
Typ.

AC 100V
93.2%
93.1%
92.8%

AC 120V
93.8%
93.7%
93.4%

AC 230V
95.2%
95.1%
94.6%

Typ.
Typ.
Typ.
Typ.

3.9W
17.4W
35.0W
42.7W

3.5W
16.4W
31.7W
38.7W

3.3W
13.8W
24.2W
29.7W

At 20AAt 24A (PowerBoost)
25% at 5A, 25% at 10A,
25% at 15A. 25% at 20A
At 0A
At 10AAt 20AAt 24A (PowerBoost)

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, typFig. 9-2 Losses vs. output current, typ.

Efficiency

Power Losses

96%
95
94
93
92
91
90
88
87

(c)
(b)
(a)

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

Output Current

4

6

40W
35
30
25
20
15
10
5
0

(a)
(b)

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

Output Current

0 2 4 6 8 10 12 14 16 18 20 22 24A

8 10 12 14 16 18 20 22 24A

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

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

Efficiency

Power Losses

96%

40W

95

35

94

30

93

25

92

20

91

15

Input Voltage

90
100 120

180

Input Voltage

10

230

264Vac100 120180

230

264VacJul. 2024 / Rev. 1.2 DS-CP20.241-R2-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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CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

CP-Series

10. 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
117 000h
331 000h
40 000h
114 000h
16 000h44 000h

AC 120V
136 000h
386 000h
53 000h
150 000h
25 000h
69 000hAC 230V
164 000h
465 000h
90 000h
253 000h
47 000h
134 000h

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

11. MTBF
MTBF stands for Mean Time Between Failures, 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
387 000h
723 000h
164 000h

AC 120V
412 000h
768 000h
169 000h

AC 230V
543 000h
976 000h
199 000h

224 000h

231 000h

272 000h

34 000h36 000h42 000h45 000h47 000h56 000h

At 20A and 40°C
At 20A and 25°C
At 20A and 40°C;
Ground Benign GB40
At 20A and 25°C;
Ground Benign GB25
At 20A and 40°C;
Ground Fixed GF40
At 20A and 25°C;
Ground Fixed GF25

Jul. 2024 / Rev. 1.2 DS-CP20.241-R2-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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CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

CP-Series

12. FUNCTIONAL DIAGRAM
Fig. 12-1 Functional diagram CP20.241-R1

LN

Input Fuse
Input Filter
Input Rectifier
Active Inrush Limiter

Temperature
Shutdown

PFC
Converter

OutputPower
ManagerPower
Converter

OutputFilterOutputVoltage
Monitor

OutputOverVoltage
Protection++-

Decoupling

DC-ok
LED
DC-ok
Relay

OutputVoltage
Regulator

DC-okContact

VOUT

Fig. 12-2 Functional diagram CP20.241-R2, CP20.242-R2 and CP20.241-R2-C1

LN

Input Fuse
Input Filter
Input Rectifier
Active Inrush Limiter

Temperature
Shutdown

PFC
Converter

OutputPower
Manager

OutputOverVoltage
Protection

Power
Converter

OutputFilterOutputVoltage
MonitorDecoupling

+
DC-ok
LED

DC-ok
Relay

OutputVoltage
Regulator

DC-okContact

VOUT

Jul. 2024 / Rev. 1.2 DS-CP20.241-R2-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

14/33

CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

CP-Series

13. TERMINALS AND WIRING
The terminals are IP20 Finger safe constructed and suitable for field- and factory wiring.
CP20.241-R1
Type
Solid wire
Stranded wire
American Wire Gauge
Max. wire diameter (including ferrules)
Wire stripping length
Screwdriver

CP20.241-R2, CP20.242-R2,
CP20.241-R2-C1
Type
Solid wire
Stranded wire
American Wire Gauge
Max. wire diameter (including ferrules)
Recommended tightening torque
Wire stripping length
Screwdriver

Input
Quick-connect springclamp terminal
Max. 6mm2Max. 4mm2
AWG 20-10
2.8mm
10mm

OutputQuick-connect springclamp terminal
Max. 6mm2Max. 4mm2
AWG 20-10
2.8mm
10mm

DC-OK-Signal
Push-in terminal

Input

OutputDC-OK-Signal

Plug connector withscrew terminal
Max. 4mm2Max. 2.5mm2
AWG 20-12
2.4mm
Max. 0.5Nm
7mm
3.5mm slotted or crosshead No 2
Do not unplug theconnectors more often
than 20 times in total

Plug connector withscrew terminal
Max. 6mm2Max. 6mm2
AWG 24-10
3.2mm
Max. 0.6Nm
12mm
3.5mm slotted or crosshead No 2
Do not unplug theconnectors more often
than 20 times in total

Plug connector withscrew terminal
Max. 1.5mm2Max. 1.5mm2
AWG 26-14
1.8mm
Max. 0.8Nm
6mm
3.5mm slottedMax. 1.5mm2Max. 1.5mm2
AWG 24-16
1.6mm
7mm
3 mm slotted to open
the spring

Do not unplug theconnectors more often
than 20 times in total

Instructions for wiring:a) Use appropriate copper cables that are designed for minimum operating temperatures of:
60°C for ambient up to 45°C, 75°C for ambient up to 60°C and 90°C for ambient up to 70°C minimum.
b) Follow national installation codes and installation regulations!
c) Ensure that all strands of a stranded wire enter the terminal connection!
d) Unused terminal compartments should be securely tightened.
e) Ferrules are allowed and recommended.

Jul. 2024 / Rev. 1.2 DS-CP20.241-R2-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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CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

CP-Series

14. REPLACING UNITS WHILE THE SYSTEM IS RUNNING
This feature is available only for the CP20.241-R2, CP20.242-R2 and CP20.241-R2-C1 units, which are equipped with
hot-swappable plug connectors.
Fig. 14-1 Replacing the power supply or redundancy module while the system is running
Load

3a

3b
+

-

Output 24V 20A+-

Output 24V 20A

DC-OK

DC-OK

DCOK

DCOK

CP20.241-R2
Power Supply

CP20.241-R2
Power Supply

L

Input
N PE

L

2a

2b

1a I

1b I

Input
N PE

L
N
PE

Replacement instructions (Example for left power supply):-

Switch-off circuit breaker (1a).

-Remove plug (2a).

-Remove plug (3a). The plug prevents the cables from shorting.

-

Change power supply.

-

Put the plug (3a) back in.

-

Put the plug (2a) back in.

-Turn-on the circuit breaker (1a).

-The circuit is redundant again.

To replace the right power supply, repeat the process above using (1b), (2b) and (3b).

Jul. 2024 / Rev. 1.2 DS-CP20.241-R2-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

16/33

CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

CP-Series

15. FRONT SIDE AND USER ELEMENTS
Fig. 15-1 Front side
CP20.241-R1

Fig. 15-2 Front side
CP20.241-R2
CP20.242-R2
CP20.241-R2-C1

A

Input Terminals
N, LLine input

B

Output Terminals+
Positive output–
Negative (return) output

C

Output voltage potentiometer
See chapter 24.2.

D

DC-OK LED (green)
On, when the output voltage is above 22V.

E

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

PE (Protective Earth) input

Jul. 2024 / Rev. 1.2 DS-CP20.241-R2-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

17/33

CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

CP-Series

16. EMCThe EMC behavior of the device is designed for applications in industrial environment as well as in residential, commercial
and light industry environments.
EMC Immunity
Electrostatic discharge
Electromagnetic RF field
Fast transients (Burst)

Surge voltage on input
Surge voltage on output
Surge voltage on Signals
Conducted disturbance
Mains voltage dips

Voltage interruptions
Voltage sags

Powerful transients

According to the generic standards EN 61000-6-1 and EN 61000-6-2.
Contact discharge
8kV
EN 61000-4-2
Air discharge
15kV
EN 61000-4-3
80MHz-2.7GHz
20V/m
Input lines
4kV
EN 61000-4-4
Output lines
2kV
DC-OK signal (coupling clamp)
2kV
LN
2kV
EN 61000-4-5
L  PE, N  PE
4kV
+1kV
EN 61000-4-5+ / -  PE
2kV
EN 61000-4-5
DC-OK signal  PE
1kV
EN 61000-4-6
0.15-80MHz
20V
0% of 100Vac
0Vac, 20ms
EN 61000-4-11
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
EN 61000-4-11
0% of 200Vac (=0V)
5000ms80% of 120Vac (96Vac)
1000msSEMI F47 0706
70% of 120Vac (84Vac)
500ms
50% of 120Vac (60Vac)
200ms
VDE 0160
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 C
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.Device 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

According to the generic standards EN 61000-6-3 and EN 61000-6-4.
EN 55011, EN 55015, EN 55032, FCC PartClass B
15, CISPR 11, CISPR 22
5dB higher than average limits for DC power
IEC/CISPR 16-1-2, IEC/CISPR 16-2-1
port according EN 61000-6-3*)
EN 55011, EN 55032
Class BClass A equipment: fulfilled
EN 61000-3-2Class C equipment: fulfilled in the load range
from 8 to 24A
Fulfilled, tested with constant current loads,
Voltage fluctuations, flicker
EN 61000-3-3
non pulsing
This 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.
*) Restrictions apply for applications in residential, commercial and light-industrial environments, where local DC power networks according to
EN 61000-6-3 are involved. No restrictions for all kinds of industrial applications.

Switching Frequencies
PFC converter
Main converter
Auxiliary converter

100kHz80kHz to 140kHz
60kHz

Fixed frequency
Output load dependent
Fixed frequency

Jul. 2024 / Rev. 1.2 DS-CP20.241-R2-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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CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

CP-Series

17. ENVIRONMENT
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
For storage and transportation
0.5A/K
Between +60°C and +70°C
1.25A/1000m or 5K/1000m
For altitudes >2000m, see Fig. 17-2
0.75A/-5kPa or 3K/-5kPa
For atmospheric pressures <80kPa, see Fig. 17-2
The derating is not hardware controlled. The customer has to take this into
consideration to stay below the de-rated current limits in order not to overload the unit.
According to IEC 60068-2-30
5 to 95% r.h.
Do not energize while condensation is present.
110-47kPa
See Fig. 17-2 for details
Up to 6000m
See Fig. 17-2 for details
III
According to IEC 60664-1 for altitudes up to 2000m
According to IEC 60664-1, for altitudes between 2000
IIand 6000m and atmospheric pressures from 80-47kPa.
2
According to IEC 62477-1, 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.
Tested according to ISA-71.04-1985, Severity Level G3 and IEC 60068-2-60 Test Ke
Method 4 for a service life of minimum 10years in these environments.
Some audible noise may be emitted from the power supply during no load, overload or
short circuit.

Operational temperature-40°C to +70°C

Storage temperature
Output derating

Humidity
Atmospheric pressure
AltitudeOvervoltage category

Degree of pollution
Vibration sinusoidal

Shock

Corrosive gases
Audible noise

Fig. 17-1 Output current vs. ambient temp.
(Inom 20A; Iout with PowerBoost = 24A)

Allowed Output Current

Allowed Output Current

24A

B
A

20A

0
-40

D

20A

C
B
A

12A

12A
4A

24A
16A

16A
8A

Fig. 17-2 Output current vs. altitude

0

20

40

A... Tamb < 60°C
B... Tamb < 50°C
C... Tamb < 45°C
D... Short term

8A

A... continuous
B... short term (max. 5s)

4A

60 70°C

Ambient Temperature

Altitude 0mAP*) 110kPa

2000m
80kPa

*) Atmospheric pressure

4000m
62kPa

6000m
47kPa

Jul. 2024 / Rev. 1.2 DS-CP20.241-R2-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

19/33

CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

CP-Series

18. 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 overvoltage protection

Typ.
Max.

30.5Vdc
32Vdc
In case of an internal defect, a redundant circuit limits the maximum
output voltage. The output shuts down and automatically attempts torestart.
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 derating 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
For protection values see chapter 16 (EMC).
Oxide Varistor)
Not user replaceable slow-blow high-braking
Includedcapacity fuse
0.12mA / 0.31mA
At 100Vac, 50Hz, TN-,TT-mains / IT-mains
0.18mA / 0.45mA
At 120Vac, 60Hz, TN-,TT-mains / IT-mains
0.30mA / 0.76mA
At 230Vac, 50Hz, TN-,TT-mains / IT-mains
0.16mA / 0.38mA
At 110Vac, 50Hz, TN-,TT-mains / IT-mains
0.23mA / 0.55mA
At 132Vac, 60Hz, TN-,TT-mains / IT-mains
0.39mA / 0.94mA
At 264Vac, 50Hz, TN-,TT-mains / IT-mains

Class of protection
Degree of protection
Overtemperature protection

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

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

Jul. 2024 / Rev. 1.2 DS-CP20.241-R2-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

20/33

CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

CP-Series

19. DIELECTRIC STRENGTH
The output voltage is floating and has no ohmic connection to the ground. Type and routine tests are conducted by
the manufacturer. Field tests may be conducted in the field using the appropriate test equipment which applies thevoltage with a slow ramp (2s up and 2s down). 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
2500Vac

B
3000Vac

C
1000Vac

D
500VacRoutine test

5s

2500Vac

2500Vac

500Vac

500VacField test
5s
Cut-off current setting
for field test

2000Vac

2000Vac

500Vac

500Vac> 10mA> 10mA> 20mA> 1mA

Fig. 19-1 Dielectric strength

Input

DC-ok
B *)

L
N

B

A

D
OutputEarth, PEC+-

It is recommend that either the + pole, the – pole or any other partof the output circuit shall be connected to the earth/ground system.
This helps to avoid situations in which a load starts unexpectedly or
can not be switched off when unnoticed earth faults occur.

B*) When testing input to DC-OK ensure that the maximal 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.

Jul. 2024 / Rev. 1.2 DS-CP20.241-R2-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

21/33

CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

CP-Series

20. APPROVED, FULFILLED OR TESTED STANDARDSIEC 61010-2-201

UL 61010-2-201

IEC 62368

EN 60079 (ATEX)

IEC 60079 (IECEx)

Class I Div 2

SEMI 47

CB Scheme Certificate
Electrical Equipment for Measurement, Control andLaboratory Use - Particular requirements for control
equipment
UL Certificate
Listed equipment for category NMTR - Electrical Equipment
for Measurement, Control and Laboratory Use - Particularrequirements for control equipment
Applicable for US and Canada
E-File: E198865
CB Scheme Certificate
IEC 62368-1 Audio/video, information and communication
technology equipment - Safety requirements
Output safety level: ES1

Agency Certificate (Bureau Veritas)
EN 60079-0 Explosive atmospheres - General
requirements
EN 60079-7, EN 60079-15 Equipment protection by typeof protection "e" and "n"Certificate: EPS 17 ATEX 1 089 X
Temperature Code: T4
Type of Protection: ec nC
IECEx Certificate
IEC 60079-0 Explosive atmospheres - General
requirements
IEC 60079-7, IEC 60079-15 Equipment protection bytype of protection "e" and "n"Certificate: IECEx EPS 17.0046X
Temperature Code: T4
Type of Protection: ec nC
UL Certificate
Listed equipment for category NRAD - Listed
equipment Industrial Control Equipment for Use in
Hazardous Locations
Applicable for US and Canada
E-File: E327416
Temperature Code: T4
Groups: A, B, C and D
Test Report
Voltage Sag Immunity for Semiconductor Processing
Equipment
Tested for AC 208V L-L or L-N mains voltages, nominal output
voltage and nominal output load

Jul. 2024 / Rev. 1.2 DS-CP20.241-R2-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

22/33

CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

CP-Series

IEC 60068-2-60

ISA-71.04 G3

Labs

Manufacturer's Declaration (Online Document)
Environmental Tests, Flowing Mixed Gas Corrosion Test
IEC 60068-2-60 Method 4
Test Ke - Method 4
H2S: 10ppb
NO2: 200ppb
Cl2: 10ppb
SO2: 200ppb
Test Duration: 3 weeks, this simulates a service life of 10
years.
Manufacturer's Declaration (Online Document)
Airborne Contaminants Corrosion Test
ISA-71.04 G3
Severity Level: G3 Harsh
H2S: 100ppb
NOx: 1250ppb
Cl2: 20ppb
SO2: 300ppb
Test Duration: 3 weeks, this simulates a service life of 10
years.
Paint Wetting Impairment Substances Test (or LABS-Test)
Tested for Zone 2 and test class C1 according to VDMA 24364C1-L/W for solvents and water-based paints

21. REGULATORY PRODUCT COMPLIANCEEC Declaration of Conformity

REACH Regulation (EU)

WEEE Regulation

KC

CCC

The CE mark indicates conformance with the- EMC directive (available),- Low-voltage directive (available) and the- ATEX directive (planned)
Manufacturer's Declaration
EU regulation regarding the Registration, Evaluation,
Authorisation and Restriction of Chemicals (REACH) fulfilled.
EU Regulation (EC) 1907/2006.
Manufacturer's Declaration
EU Regulation on Waste Electrical and Electronic Equipment
Registered as business to business (B2B) products.
EU Regulation 2012/19/EU
KC Korean Certification
Korean - Registration of Broadcasting and Communication
Equipment
Registered under Clause3, Article 58-2 of Radio Waves Act.
Registration No. R-R-PUG-CP20_241-R1.
CCC Certificate
China Compulsory Certification (CNCA-C23-01:2019)
Certificate for devices made in Suzhou/China (PULSElectronics): 2021122303114443
Certificate for devices made in Chomutov/Czech Republic(PULS investiční): 2021122303114444
CCC-ExJul. 2024 / Rev. 1.2 DS-CP20.241-R2-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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CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

CP-Series

22. PHYSICAL DIMENSIONS AND WEIGHT
Width
HeightDepth

WeightDIN rail
Housing material
Installation clearances
Penetration protection

48mm
124mm (without plug-connectors)
127mm (without plug-connector)
The DIN rail depth must be added to the unit depth to calculate the total required
installation depth.
830g for CP20.241-R1
850g for CP20.241-R2
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 viewCP20.241-R1

Fig. 22-2 Side view CP20.241-R1

All dimensions in mm

All dimensions in mm

Jul. 2024 / Rev. 1.2 DS-CP20.241-R2-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

24/33

CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

CP-Series

Fig. 22-3 Front view CP20.241-R2, CP20.242-R2,
CP20.241-R2-C1

Fig. 22-4 Side view CP20.241-R2, CP20.242-R2,
CP20.241-R2-C1

All dimensions in mm
All dimensions in mm

Jul. 2024 / Rev. 1.2 DS-CP20.241-R2-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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CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

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

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

Jul. 2024 / Rev. 1.2 DS-CP20.241-R2-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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CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

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 (including the PowerBoost). The same situation applies whenstarting a capacitive load.
The peak current capability also ensures the safe operation of subsequent circuit breakers of load circuits. The loadbranches 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 breaker need a certain amount of overcurrent 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. 24-3

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

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

Please note: The DC-OK relay might triggers when thevoltage dips below 22Vdc for longer than 1ms.

Peak current voltage dips

typ.
typ.
typ.

from 24V to 16Vfrom 24V to 21Vfrom 24V to 16.5V

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

Jul. 2024 / Rev. 1.2 DS-CP20.241-R2-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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CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

CP-Series

24.2. ADJUSTING THE OUTPUT VOLTAGE
A voltage adjustment potentiometer can be found behind the flap on the front of the unit. However, it is notrecommended to change the output voltage since load sharing between power supplies connected in parallel can only
be achieved by a precise setting of the output voltages. The factory settings allow precise load sharing and only
qualified personnel should change the adjustment potentiometer.
Lower end of the specified adjustment range
Output voltage
Nom. 24.0V

Output current

Due to the soft output voltage regulation characteristic(parallel mode feature) a setting to 24.0V results to an output
voltage of 23.8V±0.2% at 24A and 25.0V±0.2% at no load.
See Fig. 24-4.
24A
At 45°C
20A
At 60°C
15A
At 70°C
Reduce output current linearly between +45°C and +70°C.

Min.
Min.
Min.

Upper end of the specified adjustment range
Output voltage
Nom. 28.0V

Output current

Due to the soft output voltage regulation characteristic(parallel mode feature) a setting to 28.0V results to an output
voltage of 27.7V±0.2% at 20.6A and 29.2V±0.2% at no load.
See Fig. 24-4.
20.6A
At 45°C
17.1A
At 60°C
13.0A
At 70°C
Reduce output current linearly between +45°C and +70°C.

Min.
Min.
Min.

The maximum output voltage which can occur at the clockwise end position of the potentiometer due to tolerances is30V. It is not a guaranteed value which can be achieved. The typical value is 29.5V.
Current values between 24 and 28V can be interpolated.
Fig. 24-4 Adjustment range of the output
voltage

Output Voltage Range, typ.
a) 480W pointb) 576W point

29.2V
28.0V
27.7V

a)

b)

Specified
Adjustment
Range

20.0A
20.8A

Output Current

17.1A

0A

a)

b)

24.2A

25.0V
24.0V
23.8V

The output voltage shall only be changed when absolutely necessary, e.g. for battery charging as described in the next
chapter.

Jul. 2024 / Rev. 1.2 DS-CP20.241-R2-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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CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

CP-Series

24.3. CHARGING OF BATTERIESThis redundancy power supply is ideal for charging batteries due to the decoupling circuit built in to the output stage
which does not require a fuse or diode between the power supply and the battery.
It can be used to charge sealed lead acid (SLA) or valve regulated lead acid (VRLA) lead batteries when following these
instructions:a)

Set output voltage (measured at disconnected battery) very precisely to the end-of-charge voltage. Use thepotentiometer, which is hidden behind the flap on the front of the unit. See chapter 24.2.
Battery temperature

10°C

20°C

30°C

40°C

End-of-charge voltage

27.8V

27.5V

27.15V

26.8Vb)

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

c)

Use only matched batteries when connecting 12V types in series.

d)

The return current to the power supply (battery discharge current) is typically 11mA when the power supply isswitched off.

24.4. OUTPUT CIRCUIT BREAKERS
Standard miniature circuit breakers (MCB’s or UL 1077 circuit breakers) are commonly used for AC-supply systems andmay also be used on 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 size that 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, afast (magnetic) tripping of the MCB is desired. A quick shutdown within 10ms is necessary corresponding roughly tothe ride-through time of PLC's. This requires power supplies with high current reserves and large output capacitors.
Furthermore, the impedance of the faulty branch must be 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 crosssection and wire length.
Fig. 24-5 Test circuit

Power Supply

AC

MCB

+

+
Wire length

DC S1... Fault simulation switch

*)

Load

S1

-

Maximal wire length*) for a fast (magnetic) tripping:
0.75mm²
1.0mm²1.5mm²2.5mm²
C-2A
34m
45m
64m
101m
C-3A
27m
36m
52m
79m
C-4A
19m
26m
35m
56m
C-6A
9m
12m
16m
23m
C-8A
4m
8m
12m
18m
C-10A
4m
6m
9m
15m
C-13A
2m
3m
4m
5m
B-6A
23m
30m
38m
67m
B-10A
11m
14m
21m
32m
B-13A
7m
12m
17m
23m
B-16A
4m
6m
8m
11m
B-20A
1m
1m
2m
4m

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

Jul. 2024 / Rev. 1.2 DS-CP20.241-R2-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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CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

CP-Series

24.5. SERIES OPERATIONPower supplies 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 a potential above 60Vdc must be installed with a protection against
touching.

Unit A

Input

OutputAvoid return voltage (e.g. from a decelerating motor or battery) which isapplied to the output terminals.

++

Unit B

Load

Input

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 (input terminals on bottom of the unit).

Output-+-Pay attention that leakage current, EMI, inrush current, harmonics will increase when using multiple power supplies.

24.6. PARALLEL USE TO INCREASE OUTPUT POWER
Power supplies can be paralleled to increase the output power. For
redundancy applications one extra power supply is always needed forsufficient output current in case one unit fails.

Unit AInput

The unit is permanently set to “parallel use” mode in order to achieveload sharing between power supplies connected in parallel. The “Paralleluse” mode regulates the output voltage in such a manner that the voltage
at no load is approx. 4% higher than at nominal load. See also chapter 6.

+-

Output+Unit B

Load

Input

Energize all units at the same time. It also might be necessary to cycle theinput power (turn-off for at least five seconds), if the output was inoverload or short circuits and the required output current is higher thanthe current of one unit.

+-

Output-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 parallel in mounting orientations other than the standard mounting orientation (input
terminals on bottom of the unit) or in any other condition where a derating of the output current is required (e.g.
altitude).
Pay attention that leakage current, EMI, inrush current, harmonics will increase when using multiple power supplies.
Do not load paralleled power supplies with higher currents as shown in the following diagrams:
Fig. 24-6 Output current vs. ambient temp. fortwo paralleled units

Fig. 24-7 Output current vs. ambient temp.
for three paralleled units

Allowed output current for two paralleled units
48A
B

Allowed output current for three paralleled units
72A
B

40A

60A

A

32A

28A

42A

24A

36A
A... continuous
B... short term (max. 5s)

16A
8A
0

30

A

48A

36.6

40

50

60

70°C

24A
A... continuous
B... short term (max. 5s)

12A
0

30

36.6

40

50

60

70°C

Ambient Temperature

Ambient Temperature

Jul. 2024 / Rev. 1.2 DS-CP20.241-R2-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

30/33

CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

CP-Series

24.7. PARALLEL USE FOR REDUNDANCYPower supplies can be paralleled for redundancy to gain higher system availability. The unit is already equipped with a
MOSFET as decoupling device on the output to avoid, that a faulty unit becomes a load for the other power supplies
and the output voltage cannot be maintained any more.
Recommendations for building redundant power systems:a)b)

Use separate input fuses for each power supply.
Monitor the individual power supply units by utilizing the built-in DC-OK relay contacts on each power supply.

Fig. 24-8 Wiring diagram, 1+1 Redundancy for 20A output current
24V, 20A
Load

FailureMonitor

-

+

-

+

Output 24V 20A

Output 24V 20A

DC-OK

DC-OK

DCOK

DCOK

CP20.241-Rx
Power Supply

CP20.241-Rx
Power Supply

Input
L N PEInput
L N PE

I

I

L
N
PE

Note: Use separate mains systems for each power supply whenever it is possible

Fig. 24-9 Wiring diagram, N+1 Redundancy for 40A output current
FailureMonitor

24V, 40A
Load

-

+

Output 24V 20A-+

Output 24V 20A-+

Output 24V 20A

DC-OK

DC-OK

DC-OK

DCOK

DCOK

DCOK

CP20.241-Rx
Power Supply

CP20.241-Rx
Power Supply

CP20.241-Rx
Power Supply

Input
L N PEInput
L N PEInput
L N PE

I

I

Observe thetemperature derating
requirements of Fig. 24-6
and Fig. 24-7 for N+1
redundancy applications.

I

L
N
PE

Note: Use separate mains systems for each power supply whenever it is possible.

Jul. 2024 / Rev. 1.2 DS-CP20.241-R2-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

31/33

CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

CP-Series

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

240V +10% max.

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

Power Supply

L1

L3

AC
L
N
PE

L2

DC

24.9. 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
Enclosure:
Load:
Input:
Temperature inside enclosure:
Temperature outside enclosure:
Temperature rise:

Rittal Typ IP66 Box PK 9519 100, plastic, 180x180x165mm
24V, 16A; (=80%) load is placed outside the box
230Vac
51.9°C (in the middle of the right side of the power supply with a distance of 2cm)
25.6°C
26.3K

Jul. 2024 / Rev. 1.2 DS-CP20.241-R2-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

32/33

CP20.241-R1, CP20.241-R2,
CP20.242-R2, CP20.241-R2-C1
24V, 20A, 480W, SINGLE PHASE

CP-Series

24.10. MOUNTING ORIENTATIONSMounting orientations other than all terminals on the bottom require a reduction in continuous output power or alimitation in the maximum allowed ambient temperature. The amount of reduction influences the lifetime expectancyof the power supply. Therefore, two different derating curves for continuous operation can be found below:
Curve A1
Curve A2

Recommended output current.
Max allowed output current (results in approximately half the lifetime expectancy of A1).

Fig. 24-10
Mounting
Orientation A(Standardorientation)

Output Current

24A

OUTPUT

A1

18
Power
Supply12
6
Ambient Temperature

0

INPUT

10
Fig. 24-11
Mounting
Orientation B(Upside down)

20

30

50

40

60°C

Output Current

24A
A1

INPUT

18

A2

Power
Supply12
6
Ambient Temperature

OUTPUT

010

Fig. 24-12
Mounting
Orientation C(Table-top
mounting)

20

30

40

50

60°C

Output Current

24A
A1

18

A2

12
6
Ambient Temperature

0
10

50

40

60°C

24A
OUTPUT

Power
Supply

18

A2

A1

12
6

Ambient Temperature

0
10

20

30

40

A1

A2

50

60°C

Output Current

18
INPUT

Power
Supply24A
OUTPUT

Fig. 24-14
Mounting
Orientation E(Horizontal ccw)

30

Output Current

INPUT

Fig. 24-13
Mounting
Orientation D(Horizontal cw)

20

12
6

Ambient Temperature

0
10

20

30

40

50

60°C

Jul. 2024 / Rev. 1.2 DS-CP20.241-R2-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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