Puls CP20.241-R1, CP20.241-R2, CP20.242-R2, CP20.241-R2-C1 Data Sheet

R2,

R

G

S

Output voltage

Nominal

Adjustment range

-

Output current

Below +

20A

At +60°C ambient

At +70°C ambient

Derate linearely between +45°C and +70°C

AC Input voltage

AC 100-240V

-15%/+10%

Mains frequency

±6%

AC Input current

4.28 / 2.25A

At 120 / 230Vac

Power factor

A

Input voltage DC

±20%

For CP20.241

DC 110-300V

±20%

For CP20.242-xx

Input current DC

At 110

AC Inrush current

10 / 4.5Apk

At 120 / 230Vac

Efficiency

93.8 / 95.2%

At 120 / 230Vac

Losses

A

Hold

At 120 / 230Vac

Temperature range

-40°C to +70°C

Size

Without DIN
plug connectors

Weight

830g / 1.83lb

CP20.241-R1

850g / 1.87lb

CP20.24x-R2

O

M

IND. CONT. EQ.

CP20.241-R1, CP20.241-

CP-Series

ENERAL DESCRIPTION

The Dimension CP-Series are cost optimized power
supplies without compromising quality, reliability and
performance. The most outstanding features of the
CP20.241–R1/-R2 units are the high efficiency, electronic
inrush current limitation, active PFC, wide operational
temperature range and the extraordinary small size. The
units include a decoupling MOSFET for building 1+1 or
n+1 redundant power supply systems.

These redundancy power supplies come with three
connection terminal options; screw terminals, spring­clamp terminals or plug connector terminals which
allows replacement on an active application.

CP20.242-R2 version feature an enhanced DC input
voltage range and the CP20.241-R2-C1 is additionally
equipped with conformal coated pc-boards.

With high immunity to transients and power surges, low
electromagnetic emission, a DC-OK signal contact for
remote monitoring, and a large international approval
package, makes this unit suitable for nearly every
application.

RDER NUMBERS

Power Supplies

CP20.241-R1 With quick-connect spring-clamp
terminals
CP20.241-R2 With hot swappable plug
connectors (preferred item)

CP20.242-R2 Enhanced DC-Input
CP20.241-R2-C1 With conformal coated pc boards

Mechanical Accessory

ZM5.WALL Wall mount bracket

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

EDUNDANCY 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
 Safe Hiccup
 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

HORT-FORM DATA

(w x h x d) 48x124x127mm

ARKINGS

For details or a complete approval list see section 20.

PLUS

Overload Mode

DC 24V

24A

15A

50-60Hz

0.99 / 0.98
DC 110-150V

4.64A / 1.66A

31.7 / 24.2W

-up time 32 / 32ms

t 120 / 230Vac

/ 300Vdc

t 120 / 230Vac

IECEx

45°C ambient

-xx

-rail and

ATEX

Nov. 2019 / Rev. 1.0 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.

1/32

R2,

I

CP20.241-R1, CP20.241-

CP-Series

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

NDEX

Page 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 ........................ 20

The information given in this document is correct to the best of our knowledge and experience at the time of
publication. If not expressly agreed otherwise, this information does not represent a warranty in the legal sense of the
word. As the state of our knowledge 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.

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

19. Dielectric Strength ............................................ 21

20. Approvals .......................................................... 22

21. Other Fulfilled Standards ................................. 22

22. Physical Dimensions and Weight ..................... 23

23. Accessories ........................................................ 25

23.1. ZM5.WALL – Wall/Panel Mount Bracket . 25

24. Application Notes ............................................. 26

24.1. Peak Current Capability ........................... 26

24.2. Adjusting the Output Voltage ................. 27

24.3. Charging of Batteries ............................... 28

24.4. Output Circuit Breakers ............................ 28

24.5. Series Operation ....................................... 29

24.6. Parallel Use to Increase Output Power .... 29

24.7. Parallel Use for Redundancy .................... 30

24.8. Operation on Two Phases ........................ 31

24.9. Use in a Tightly Sealed Enclosure ............ 31

24.10. Mounting Orientations ............................ 32

Nov. 2019 / Rev. 1.0 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.

2/32

R2,

T

Redundancy

Redundancy

AC

DC

CP20-Rx

Load

+

-

AC

DC

CP20-Rx

AC

DC

CP20-Rx

AC

DC

CP20-Rx

AC

DC

CP20-Rx

AC

DC

CP20-Rx

AC

DC

CP20-Rx

Load

+

-

AC

DC

CP20-Rx

CP20.241-R1, CP20.241-

CP-Series

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

ERMINOLOGY AND ABREVIATIONS

PE and symbol PE 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)

230Vac A 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.

should A 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 each
other by utilizing diodes or other switching arrangements. E.g. two 20A power supplies are
needed to achieve a 20A
redundant system.

N+1 Redundancy Use of three or more identical

power supplies in parallel to
provide continued operation
following most failures in a
single power supply. All power
supply outputs should be
isolated from each other by
utilizing diodes or other
switching arrangements.
E.g.: To achieve a 80A redundant system, five 20A power supplies are needed in a N+1
redundant system.

N+1

1+1

Nov. 2019 / Rev. 1.0 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.

3/32

R2,

1. I

2. I

WARNING

CP20.241-R1, CP20.241-

CP-Series

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

NTENDED USE

This device is designed for installation in an enclosure and is intended for the general professional use such as in
industrial control, office, communication, and instrumentation equipment.

Do not use this power supply in equipment, where malfunction may cause severe personal injury or threaten human
life.

NSTALLATION REQUIREMENTS

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 for
earth 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 de-rating 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 are
recommended when the device is loaded permanently with more than 50% of the rated power. Increase this
clearance 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 are
designed 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 the
device 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 to
avoid a nuisance tripping of the circuit breaker.

- A disconnecting means shall be provided for the input of the power supply.

Nov. 2019 / Rev. 1.0 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.

4/32

R2,

CP20.241-R1, CP20.241-

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 the
voltage 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 in
accordance 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 the
requirements of the EN 60079-0.

CP-Series

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

Nov. 2019 / Rev. 1.0 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.

5/32

R2,

3. AC-I

AC input

AC input range

Allowed voltage L or N to earth

Input frequency

Turn

Shut

Extern

Input current

Power factor

Cre

Start

Rise time

Typ.

145ms

145ms

145ms

At 20A const. current load, 0mF

Turn

Turn-on

85V

Rated

input range

max.

500ms

V

IN

P

OUT

300Vac

264V

Shut-down

Start-up

delay

Rise

Time

Overshoot

- 5%

Output
Voltage

Input
Voltage

24A

2 4 6 8 10 12 14 16 18

0

1

2

3

4

5

6A

Input Current, typ.

20 22

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

b

a

c

Output Current

Power Factor, typ.

2 4 6 8 10 12 14 16 18 24A

0.75

0.8

0.85

0.9

0.95

1.0

20 22

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

a, b

c

Output Current

CP20.241-R1, CP20.241-

CP-Series

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

NPUT

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.

Nom. AC 100-240V

Min. 85-264Vac Continuous operation

Min. 264-300Vac For maximal 500ms (occasional)

Max. 300Vac Continuous, according to IEC 62477-1

Nom. 50–60Hz ±6%

-on voltage Typ. 82Vac Steady-state value, see Fig. 3-1

-down voltage Typ. 72Vac Steady-state value, see Fig. 3-1
al input protection See recommendations in chapter 2.

AC 100V AC 120V AC 230V

Typ. 5.17A 4.28A 2.25A At 20A, see Fig. 3-3

Typ. 0.996 0.996 0.980 At 20A, see Fig. 3-4

st factor Typ. 1.65 1.63 1.63 At 20A, The crest factor is the

-up delay Typ. 450ms 450ms 450ms See Fig. 3-2

mathematical ratio of the peak
value to RMS value of the input
current waveform.

load capacitance, see Fig. 3-2

Typ. 160ms 160ms 160ms At 20A const. current load, 20mF

load capacitance,, see Fig. 3-2

-on overshoot Max. 1000mV 1000mV 1000mV See Fig. 3-2

Fig. 3-1 Input voltage range Fig. 3-2 Turn-on behavior, definitions

Fig. 3-3 Input current vs. output current Fig. 3-4 Power factor vs. output current

Nov. 2019 / Rev. 1.0 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.

6/32

R2,

4. DC-INPUT

DC input

DC input range

DC input current

Allowed Voltage (+) or (
to Earth

Turn

Shut

+

-

Load

L

PE

+

-

Power Supply

AC

DC

Battery

N

CP20.241-R1, CP20.241-

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 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.

Nom. DC 110-150V ±20% for CP20.241-Rx

Min. 88-180Vdc Continuous operation for CP20.241-Rx

Typ. 4.64A At 110Vdc and 20A load current

-on voltage Typ. 80Vdc Steady state value

-down voltage Typ. 70Vdc Steady state value

Fig. 4-1 Wiring for DC Input

CP-Series

-) input

Nom. DC 110-300V ±20% for CP20.242-Rx

88-360Vdc Continuous operation for CP20.242-Rx

Typ. 1.66A At 300Vdc and 20A load current
Max. 375Vdc Continuous according to IEC 62477-1

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

Nov. 2019 / Rev. 1.0 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.

7/32

R2,

5. I

Inrush current

Inrush energy

CP20.241-R1, CP20.241-

CP-Series

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

NPUT 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.

Max. 15A

Max. 1A2s 1A2s 1A2s Temperature independent

Fig. 5-1 Typical turn-on behavior at nominal

load and 25°C ambient

Typ. 12A

AC 100V AC 120V AC 230V

12A

peak

10A

peak

5.5A

peak

4.5A

peak

peak

peak

Temperature independent
Temperature independent

Nov. 2019 / Rev. 1.0 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.

8/32

R2,

6. O

Output voltage

Adjustment range

Factory settings
Line regulation

Load regulation

Ripple and noise voltage

Output current

Nom.

20A

At 60°C ambient temperature, see Fig. 17-1

Fuse breaking current

Overload protection

Included

Electronically protected against overload, no-load

audible noise may occur.

Overload behaviour

Overload/ short

Output capacitance

Back

CP20.241-R1, CP20.241-

CP-Series

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

UTPUT

The output provides a SELV/PELV/ES1 rated voltage, which is galvanically isolated from the input voltage. The output
of 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 Hiccup

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.

Nom. DC 24V 23.8 - 25.2V

See chapter 24.2

24.1V ±0.2%, at 20A, cold unit (results to typ. 23.9V

Max. 10mV 85-300Vac

Typ. 1000mV Static value, 0A  20A; see Fig. 6-1

Max. 100mVpp 20Hz to 20MHz, 50Ohm

Nom. 24A1) Below 45°C ambient temperature, see Fig. 17-1

PLUS

mode.

24A and typ. 25.1V

±0.2%

at no load)

±0.2%

at

Nom. 15A At 70°C ambient temperature, see Fig. 17-1

2)

Typ. 60A Up to 12ms once every five seconds, see Fig. 6-3.

and short-circuits. In case of a protection event,

Continuous current Output voltage >13Vdc, see Fig. 6-1

Intermitted current3) Output voltage <13Vdc, see Fig. 6-1

-circuit current 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.

Max. 9.8A Intermitted current average value (R.M.S.)

Load impedance 10mOhm, see Fig. 6-2

Typ. 8 000µF Included inside the power supply

-feeding loads

1) This current is also available for temperatures up to +70°C with 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, the
output 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.

Max. 35V The unit is resistant and does not show

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

Nov. 2019 / Rev. 1.0 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.

9/32

R2,

Output Voltage

0

0 25

4

8

12

28V

16

20

24

40A

155

10

20

30 35

Output Current

A: continuous current
B: intermitted current

A

B

Output
Current

0

29A

18s

18s

18s

2s

2s

2s

t

Short -circuit

Normal

operation

Normal

operation

Output Voltage (dynamic behavior, < 12ms)

0

0

4

8

12

28V

16

20

24

70A30

10 40

50

20 60

Output Current

7. H

Hold

0

10

20

30

40

80ms

85 120 155 190 230Vac

Input Voltage

50

60

Hold-up Time

20A, typ.

10A, min.

10A, typ.

70

20A, min.

- 5%

Hold-up Time

Zero Transition

Output
Voltage

Input
Voltage

CP20.241-R1, CP20.241-

CP-Series

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

Fig. 6-1 Output voltage vs. output current, typ. Fig. 6-2 Short-circuit on output, Hiccup

Fig. 6-3 Dynamic overcurrent capability, typ.

PLUS

mode, typ.

OLD-UP TIME

-up Time Typ. 65ms 65ms 65ms At 10A, see Fig. 7-1

Fig. 7-1 Hold-up time vs. input voltage Fig. 7-2 Shut-down behavior, definitions

Nov. 2019 / Rev. 1.0 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.

AC 100V AC 120V AC 230V

Min. 54ms 54ms 54ms At 10A, see Fig. 7-1
Typ. 32ms 32ms 32ms At 20A, see Fig. 7-1
Min. 24ms 24ms 24ms At 20A, see Fig. 7-1

10/32

R2,

8. DC-OK R

Contact closes

Contact opens
Switching hysteresis

Contact ratings

Isolation voltage

100ms

22Vdc

<

1ms

open

openclosed

closed

>

1...4ms

CP20.241-R1, CP20.241-

CP-Series

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

ELAY CONTACT

This feature monitors the output voltage of the power supply in front of the decoupling device (see also chapter 12).

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.

Fig. 8-1 DC-ok relay contact behavior

Nov. 2019 / Rev. 1.0 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.

11/32

R2,

9. EFFICIENCY AND POWER LOSSES

Efficiency

Average efficiency
Power losses

Efficiency

4 6 8 10 12 14 18 20 24A

87

88

90

91

92

93

94

95

96%

Output Current

16 22

(a)

(b)

(c)

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

Power Losses

0 2 6 8 12 14 24A

5
0

10

20

30

40W

18 20

4

10

16

Output Current

22

(a)
(b)

(c)

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

35

25

15

Efficiency

120 180 230 264Vac

90

91

92

93

Input Voltage

94

95

96%

100

Power Losses

120 180 230 264Vac

10

15

20

25

Input Voltage

30

35

40W

100

CP20.241-R1, CP20.241-

CP-Series

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

AC 100V AC 120V AC 230V

Typ. 93.2% 93.8% 95.2% At 20A

Typ. 93.1% 93.7% 95.1% At 24A (Power Boost)

*)

Typ. 92.8% 93.4% 94.6% 25% at 5A, 25% at 10A,

25% at 15A. 25% at 20A

Typ. 3.9W 3.5W 3.3W At 0A

Typ. 17.4W 16.4W 13.8W At 10A
Typ. 35.0W 31.7W 24.2W At 20A
Typ. 42.7W 38.7W 29.7W At 24A (Power Boost)

*) 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, typ Fig. 9-2 Losses vs. output current, typ.

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

typ.

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

Nov. 2019 / Rev. 1.0 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.

12/32

R2,

10. L

Lifetime expectancy

11. MTBF

MTBF SN 29500, IEC 61709

MTBF MIL HDBK 217F

CP20.241-R1, CP20.241-

CP-Series

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

IFETIME EXPECTANCY

The 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 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.

AC 100V AC 120V AC 230V

117 000h 136 000h 164 000h At 10A and 40°C

331 000h 386 000h 465 000h At 10A and 25°C

40 000h 53 000h 90 000h At 20A and 40°C

114 000h 150 000h 253 000h At 20A and 25°C

16 000h 25 000h 47 000h At 24A and 40°C
44 000h 69 000h 134 000h At 24A and 25°C

MTBF stands for Mean Time Between Failure, which is calculated according to statistical device failures, and indicates
reliability 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.

AC 100V AC 120V AC 230V

387 000h 412 000h 543 000h At 20A and 40°C

723 000h 768 000h 976 000h At 20A and 25°C

164 000h 169 000h 199 000h At 20A and 40°C;

224 000h 231 000h 272 000h At 20A and 25°C;

34 000h 36 000h 42 000h At 20A and 40°C;

45 000h 47 000h 56 000h At 20A and 25°C;

Ground Benign GB40

Ground Benign GB25

Ground Fixed GF40

Ground Fixed GF25

Nov. 2019 / Rev. 1.0 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.

13/32

R2,

12. F

Output

Over-

Voltage

Protection

PFC

Converter

Power

Converter

Output

Filter

Output

Power

Manager

Temper-

ature
Shut-

down

Input Fuse
Input Filter
Input Rectifier
Active Inrush Limiter

L

N

Decoupling

+

+

-

-

-

Output

Voltage

Regulator

Output

Voltage

Monitor

V

OUT

DC-ok
Contact

DC-ok
LED

DC-ok
Relay

+

-

Output

Over-

Voltage

Protection

PFC

Converter

Power

Converter

Output

Filter

Output

Power

Manager

Temper-

ature
Shut-

down

Input Fuse
Input Filter
Input Rectifier
Active Inrush Limiter

L

N

Decoupling

Output

Voltage

Regulator

Output

Voltage

Monitor

V

OUT

DC-ok
Contact

DC-ok
LED

DC-ok
Relay

CP20.241-R1, CP20.241-

CP-Series

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

UNCTIONAL DIAGRAM

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

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

Nov. 2019 / Rev. 1.0 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.

14/32

R2,

13. T

CP20.241

Type
Solid wire

Stranded wire

American Wire Gauge

Max. wire diameter (including ferrules)

Wire stripping length

Scre

CP20.241
CP20.241

Type
Solid wire

Stranded wire

American Wire Gauge

Max. wire diameter (including ferrules)

Recommended tightening torque

Wire stripping length

Screwdriver

Instructions

a)

b)
c)
d
e

CP20.241-R1, CP20.241-

CP-Series

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

ERMINALS AND WIRING

The terminals are IP20 Finger safe constructed and suitable for field- and factory wiring.

-R1 Input Output DC-OK-Signal

Quick-connect spring-

clamp termination

Max. 6mm2 Max. 6mm2 Max. 1.5mm2

Max. 4mm2 Max. 4mm2 Max. 1.5mm2

AWG 20-10 AWG 20-10 AWG 24-16

2.8mm 2.8mm 1.6mm

10mm / 0.4inch 10mm / 0.4inch 7mm / 0.28inch

wdriver 3 mm slotted to open

-R2, CP20.242-R2,

-R2-C1

Plug connector with

Max. 4mm2 Max. 6mm2 Max. 1.5mm2

Max. 2.5mm2 Max. 6mm2 Max. 1.5mm2

AWG 20-12 AWG 24-10 AWG 26-14

Max. 0.5Nm, 4.5lb-in Max. 0.6Nm, 5.3lb-in Max. 0.8Nm, 7lb-in

7mm / 0.28inch 12mm / 0.47inch 6mm / 0.24inch

3.5mm slotted or cross-

for wiring:

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.

Follow national installation codes and installation regulations!

Ensure that all strands of a stranded wire enter the terminal connection!
) Unused terminal compartments should be securely tightened.
) Ferrules are allowed and recommended.

Input Output DC-OK-Signal

screw termination

2.4mm 3.2mm 1.8mm

head No 2
Do not unplug the

connectors more often
than 20 times in total

Quick-connect spring­clamp termination

Plug connector with
screw termination

3.5mm slotted or cross­head No 2

Do not unplug the
connectors more often
than 20 times in total

Push-in termination

the spring

Plug connector with
screw termination

3.5mm slotted

Do not unplug the
connectors more often
than 20 times in total

Nov. 2019 / Rev. 1.0 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.

15/32

R2,

14. REPLACING UNITS WHILE THE SYSTEM IS RUNNING

Load

I

I

L
N

PE

1a

L N PE

+

-

CP20.241-R2

Power Supply

DC-OK

DC­OK

Output 24V 20A

Input

L N PE

+

-

CP20.241-R2

Power Supply

DC-OK

DC­OK

Output 24V 20A

Input

1b

2a

3a

3b

2b

CP20.241-R1, CP20.241-

CP-Series

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

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

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).

Nov. 2019 / Rev. 1.0 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.

16/32

R2,

15. F

CP20.241-R1, CP20.241-

Fig. 15-1 Front side

CP-Series

RONT SIDE AND USER ELEMENTS

CP20.241-R1

Fig. 15-2 Front side

CP20.241-R2
CP20.242-R2

CP20.241-R2-C1

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

A Input Terminals

N, L Line input

PE (Protective Earth) 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 synchronized
with the DC-OK LED.
See chapter 8 for details.

Nov. 2019 / Rev. 1.0 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.

17/32

R2,

16. EMC

EMC Immunity

According to the generic standards EN 61000-6-1 and EN 61000-6-2.

Electrostatic d
Electromagnetic RF field

Fast transients (Burst)
Surge voltage on input

Surge voltage on output

EN 61000-4-5

+  -

1kV

Criterion A

Surge voltage on Signals

Conducted disturbance

Mains voltage dips

Voltage interruptions

Voltage sags

Powerful transients

EMC Emission

Conducted emission
input lines

Conducted emission
output lines

Radiated emission

Harmonic
Voltage fluctuations, flicker

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.

Switching Frequencies

PFC converter

Main converter

Auxiliary converter

CP20.241-R1, CP20.241-

CP-Series

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

The EMC behavior of the device is designed for applications in industrial environment as well as in residential, commercial
and light industry environments.

ischarge EN 61000-4-2 Contact discharge

Air discharge

EN 61000-4-3 80MHz-2.7GHz 20V/m Criterion A

EN 61000-4-4 Input lines

EN 61000-4-5 L  N

EN 61000-4-5 DC-OK signal  PE 1kV Criterion A

EN 61000-4-6 0.15-80MHz 20V Criterion A

EN 61000-4-11 0% of 100Vac

EN 61000-4-11 0% of 200Vac (=0V) 5000ms Criterion C

SEMI F47 0706 80% of 120Vac (96Vac)

VDE 0160 Over entire load range 750V, 0.3ms 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.

EN 55011, EN 55022 Class B

input current EN 61000-3-2 Class A equipment: fulfilled

According to the generic standards EN 61000-6-3 and EN 61000-6-4.
EN 55011, EN 55015, EN 55022, FCC Part

15, CISPR 11, CISPR 22
IEC/CISPR 16-1-2, IEC/CISPR 16-2-1 5dB higher than average limits for DC power

EN 61000-3-3 Fulfilled, tested with constant current loads,

Output lines
DC-OK signal (coupling clamp)

L  PE, N  PE

+ / -  PE

40% of 100Vac
70% of 100Vac
0% of 200Vac
40% of 200Vac
70% of 200Vac

70% of 120Vac (84Vac)
50% of 120Vac (60Vac)

Class B

port according EN 61000-6-3

Class C equipment: fulfilled in the load range
from 8 to 24A

non pulsing

8kV
15kV

4kV
2kV
2kV

2kV
4kV

2kV

0Vac, 20ms
40Vac, 200ms
70Vac, 500ms
0Vac, 20ms
80Vac, 200ms
140Vac, 500ms

1000ms
500ms
200ms

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 A
Criterion A
Criterion A

*)

*) 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.

100kHz Fixed frequency

80kHz to 140kHz Output load dependent

60kHz Fixed frequency

Nov. 2019 / Rev. 1.0 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.

18/32

R2,

17. ENVIRONMENT

Operational temperature

Storage temperature

Output de

Humidity
Atmosp

Altitude

Over

Degree of pollution

Vibration sinusoidal

Shock
LABS compatibility

Corrosive gases

Audible noise

Allowed Output Current

0

-40

0 20

40

70°C

4A

8A

12A

16A

20A

24A

60

B

A

Ambient Temperature

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

2000m 4000m

6000m

4A

8A

12A

16A

20A

24A

Altitude

Allowed Output Current

B

C

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

A

D

AP

*)

80kPa 62kPa 47kPa110kPa

0m

*) Atmospheric pressure

CP20.241-R1, CP20.241-

CP-Series

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

-40°C to +70°C (-40°F to 158°F) Operational temperature is the same as the ambient
or surrounding temperature and is defined as the air
temperature 2cm below the unit.

-40°C to +85°C (-40°F to 185°F) For storage and transportation

-rating 0.27A/°C

0.5A/°C

1.25A/1000m or 5°C/1000m

0.75A/-5kPa or 3°C/-5kPa

Between +45°C and +60°C (113°F to 140°F)
Between +60°C and +70°C (140°F to 158°F)
For altitudes >2000m (6560ft), see Fig. 17-2
For atmospheric pressures <80kPa, see Fig. 17-2

The de-rating 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.

5 to 95% r.h. According to IEC 60068-2-30

Do not energize while condensation is present.

heric pressure 110-47kPa See see Fig. 17-2 for details

Up to 6000m (20 000ft) See see Fig. 17-2 for details

-voltage category III According to IEC 60664-1 for altitudes up to 2000m
II According to IEC 60664-1, for altitudes between 2000

and 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 a
height of 15mm and a thickness of 1.3mm and standard orientation.

As a rule, only non-silicon precipitating materials are used. The unit conforms to the

LABS criteria and is suitable for use in paint shops.

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.

Fig. 17-1 Output current vs. ambient temp. Fig. 17-2 Output current vs. altitude

Nov. 2019 / Rev. 1.0 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.

19/32

R2,

18. SAFETY AND PROTECTION FEATURES

Isolation resistance

PE resistance
Output over

Class of protection
Degree of protection

Over

Input transient protection

MOV (Metal

For protection values see chapter 16 (EMC).

Internal input fuse
Touch current

Typ.

0.18mA / 0.45mA

At 120Vac, 60Hz, TN-,TT-mains / IT-mains

CP20.241-R1, CP20.241-

Max. 0.1Ohm Resistance between PE terminal and the housing in

-voltage protection Typ. 30.5Vdc

-temperature protection Included Output shut-down with automatic restart.

CP-Series

Min. 500MOhm At delivered condition between input and output,

Min. 500MOhm At delivered condition between input and PE,

Min. 500MOhm At delivered condition between output and PE,

Min. 500MOhm At delivered condition between output and DC-OK

Max. 32Vdc
In case of an internal defect, a redundant circuit limits the maximum

output voltage. The output shuts down and automatically attempts to
restart.

I According to IEC 61140

IP 20 According to EN/IEC 60529

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

measured with 500Vdc

measured with 500Vdc

measured with 500Vdc

contacts, measured with 500Vdc

the area of the DIN-rail mounting bracket.

A PE (Protective Earth) connection is required

Temperature sensors are installed on critical
components inside the unit and turn the unit off in
safety critical situations, which can happen e.g.
when ambient temperature is too high, ventilation
is obstructed or the de-rating requirements are not
followed. There is no correlation between the
operating temperature and turn-off temperature
since this is dependent on input voltage, load and
installation methods.

Included Not user replaceable slow-blow high-braking

(leakage current) Typ. 0.12mA / 0.31mA At 100Vac, 50Hz, TN-,TT-mains / IT-mains

Typ. 0.30mA / 0.76mA At 230Vac, 50Hz, TN-,TT-mains / IT-mains
Max. 0.16mA / 0.38mA At 110Vac, 50Hz, TN-,TT-mains / IT-mains
Max. 0.23mA / 0.55mA At 132Vac, 60Hz, TN-,TT-mains / IT-mains
Max. 0.39mA / 0.94mA At 264Vac, 50Hz, TN-,TT-mains / IT-mains

Nov. 2019 / Rev. 1.0 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.

Oxide Varistor)

capacity fuse

20/32

R2,

19. D

A D

C

B

B

*)

N

L

Input

DC-ok

Earth, PE

Output

-

+

CP20.241-R1, CP20.241-

CP-Series

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

IELECTRIC 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 the
voltage 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.

Fig. 19-1 Dielectric strength

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.

Type test 60s 2500Vac 3000Vac 1000Vac 500Vac

Routine test 5s 2500Vac 2500Vac 500Vac 500Vac

Field test 5s 2000Vac 2000Vac 500Vac 500Vac
Cut-off current setting

for field test

It is recommend that either the + pole, the – pole or any other part
of 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.

A B C D

> 10mA > 10mA > 20mA > 1mA

Nov. 2019 / Rev. 1.0 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.

21/32

R2,

20. A

EC Declaration of Conformity
IEC 60950
2
planned

UL 508
planned

IND. CONT. EQ.

ANSI / ISA 12.
Class I Div 2
pending

EN 60079-0, EN 60079-7
ATEX

Approval for use in hazardous locations Zone 2 Category 3G.

IEC 60079

EAC TR Registration
(only for
CP20.241

Registration for the Eurasian Customs Union market

21. O

RoHS Directive

REACH Directive

IEC/EN 61558
(Annex BB)

CP20.241-R1, CP20.241-

nd

Edition

CP-Series

PPROVALS

-1

12.01

II 3G Ex ec nC II T4 Gc

-0, IEC 60079-7

IECEx

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

The CE mark indicates conformance with the

- EMC directive (available),

- Low-voltage directive (available) and the

- ATEX directive (planned)
CB Scheme,

Information Technology Equipment

Listed for use as Industrial Control Equipment;
U.S.A. (UL 508) and Canada (C22.2 No. 107-1-01);
E-File: E198865

Hazardous Location Class I Div 2 T4 Groups A,B,C,D systems;
U.S.A. (ANSI / ISA 12.12.01) and Canada (C22.2 No. 213)

Number of ATEX certificate: EPS 17 ATEX 1 089 X

Suitable for use in Class 1 Zone 2 Groups IIa, IIb and IIc
locations.
Number of IECEx certificate: EPS 17.0046X

CP20.241-R1 and

-R2)

(Russia, Kazakhstan, Belarus)

THER FULFILLED STANDARDS

-2-16

Safety Isolating

Transformer

Directive 2011/65/EU of the European Parliament and the
Council of June 8th, 2011 on the restriction of the use of
certain hazardous substances in electrical and electronic
equipment.

Directive 1907/2006/EU of the European Parliament and the
Council of June 1
Evaluation, Authorisation and Restriction of Chemicals
(REACH)

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

st

, 2007 regarding the Registration,

Nov. 2019 / Rev. 1.0 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.

22/32

R2,

22. PHYSICAL DIMENSIONS AND WEIGHT

Width

Height

Depth
Weight
DIN

Housing material
Installation clearances

See chapter 2

Penetration protection

Small parts like screws, nuts, etc. with a diameter larger than 5mm

CP20.241-R1, CP20.241-

48mm 1.89’’

124mm 4.88’’ (without plug-connectors)

127mm 5.0’’ (without plug-connector)

830g / 1.83lb for CP20.241-R1

-Rail Use 35mm DIN-rails according to EN 60715 or EN 50022 with a height of 7.5 or 15mm.
Body: Aluminium alloy

Fig. 22-1 Front view

CP-Series

The DIN-rail height must be added to the unit depth to calculate the total required
installation depth.

850g / 1.87lb for CP20.241-R2

Cover: zinc-plated steel

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

CP20.241-R1

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

All dimensions in mm

All dimensions in mm

Nov. 2019 / Rev. 1.0 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.

23/32

R2,

CP20.241-R1, CP20.241-

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

CP-Series

CP20.241-R2-C1

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

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

CP20.241-R2-C1

All dimensions in mm

All dimensions in mm

Nov. 2019 / Rev. 1.0 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.

24/32

R2,

23. A

CP20.241-R1, CP20.241-

CP-Series

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

CCESSORIES

23.1. ZM5.WALL – WALL/PANEL MOUNT BRACKET

This bracket is used to mount the devices on a wall/panel without utilizing a DIN-Rail and can be mounted without
detaching the DIN-rail brackets of the power supply.

Fig. 23-1 Isometric view

(Picture shows the CP20.241-R2)

Fig. 23-2 Isometric view-

(Picture shows the CP20.241-R2)

Fig. 23-3 Isometric view

(Picture shows the CP20.241-R2)

Fig. 23-4 Wall/panel mounting,

front view

(Picture shows the CP20.241-R2)

Fig. 23-5 Hole pattern for wall

mounting

Fig. 23-6 Wall/panel mounting,

side view

(Picture shows the CP20.241-R2)

Nov. 2019 / Rev. 1.0 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.

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R2,

24. APPLICATION NOTES

Peak current voltage dips

CP20.241-R1, CP20.241-

CP-Series

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

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 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 breaker need 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)

Fig. 24-3 60A peak current for 12ms, typ.

(3x the nominal current)

typ. from 24V to 16V At 40A for 50ms, resistive load

typ. from 24V to 21V At 100A for 2ms, resistive load
typ. from 24V to 16.5V At 100A for 5ms, resistive load

Please note:

voltage dips below 22Vdc for longer than 1ms

The DC-OK relay might triggers when the

.

Nov. 2019 / Rev. 1.0 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.

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R2,

Lower end of the specified adjustment range

Output vo

Output current

Min.

24A

At 45°C

Upper end of the specified adjustment range

Output voltage

Output current

Reduce output current linearly between +45°C and +70°C.

Output Voltage Range, typ.

0A

20.8A

25.0V

24.0V

29.2V

23.8V

27.7V

28.0V

24.2A

17.1A

Specified

Adjustment

Range

Output Current

20.0A

a) 480W point
b) 576W point

a)

b)

b)

a)

CP20.241-R1, CP20.241-

CP-Series

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

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 not
recommended 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.

ltage Nom. 24.0V Due to the soft output voltage regulation characteristic

(parallel mode feature) a setting to 24.0V results to an output
voltage of 23.8V
See Fig. 24-4.

Min. 20A At 60°C
Min. 15A At 70°C
Reduce output current linearly between +45°C and +70°C.

Nom. 28.0V Due to the soft output voltage regulation characteristic

(parallel mode feature) a setting to 28.0V results to an output
voltage of 27.7V
See Fig. 24-4.

Min. 20.6A At 45°C

Min. 17.1A At 60°C
Min. 13.0A At 70°C

The maximum output voltage which can occur at the clockwise end position of the potentiometer due to tolerances is
30V. 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

±0.2%

at 24A and 25.0V

±0.2%

at 20.6A and 29.2V

±0.2%

at no load.

±0.2%

at no load.

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

Nov. 2019 / Rev. 1.0 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.

27/32

R2,

MCB

Power Supply

AC

DC

+

-

+

-

Load

Wire length

S1... Fault simulation switch

S1

C-4A

B-10A

CP20.241-R1, CP20.241-

CP-Series

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

24.3. CHARGING OF BATTERIES

This 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 the

potentiometer, 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 26.8V

b) 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 is

switched off.

24.4. 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 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, 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. 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 cross
section and wire length.

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

Fig. 24-5 Test circuit

Maximal wire length

C-2A 34m 45m 64m 101m
C-3A 27m 36m 52m 79m

C-6A 9m 12m 16m 23m
C-8A
C-10A
C-13A
B-6A

B-13A 7m 12m 17m 23m
B-16A 4m 6m 8m 11m
B-20A 1m 1m 2m 4m

0.75mm² 1.0mm² 1.5mm² 2.5mm²

*)

for a fast (magnetic) tripping:

19m 26m 35m 56m

4m 8m 12m 18m
4m 6m 9m 15m

2m 3m 4m 5m
23m 30m 38m 67m
11m 14m 21m 32m

Nov. 2019 / Rev. 1.0 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.

28/32

R2,

Allowed output current for two paralleled units

0

30 40 50 60

70°C

8A

16A

24A

32A

40A

48A

B

A

Ambient Temperature

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

36.6

28A

Allowed output current for three paralleled units

0

30 40 50 60

70°C

12A

24A

36A

48A

60A

72A

B

A

Ambient Temperature

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

36.6

42A

Unit A

Unit B

-

+

-

+

Load

+

-

Input

Output

Input

Output

Unit A

Input

Output

Unit B

-

+

-

+

Load

+

-

Input

Output

CP20.241-R1, CP20.241-

CP-Series

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

24.5. SERIES OPERATION

Power 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.

Avoid return voltage (e.g. from a decelerating motor or battery) which is
applied to the output terminals.

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 the
standard mounting orientation (input terminals on bottom of the unit).

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 for
sufficient output current in case one unit fails.

The unit is permanently set to “parallel use” mode in order to achieve
load sharing between power supplies connected in parallel. The “Parallel
use” 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.

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

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. for

two paralleled units

Fig. 24-7 Output current vs. ambient temp.

for three paralleled units

Nov. 2019 / Rev. 1.0 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.

29/32

R2,

24V, 20A

Load

L

N

PE

Failure

Monitor

I

I

L N PE

+

-

CP20.241-Rx

Power Supply

DC-OK

DC­OK

Output 24V 20A

Input

L N PE

+

-

CP20.241-Rx

Power Supply

DC-OK

DC­OK

Output 24V 20A

Input

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

24V, 40A

Load

L

N

PE

Failure

Monitor

L N PE

+

-

CP20.241-Rx

Power Supply

DC-OK

DC­OK

Output 24V 20A

Input

I

I

I

L N PE

+

-

CP20.241-Rx

Power Supply

DC-OK

DC­OK

Output 24V 20A

Input

L N PE

+

-

CP20.241-Rx

Power Supply

DC-OK

DC­OK

Output 24V 20A

Input

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

CP20.241-R1, CP20.241-

CP-Series

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

24.7. PARALLEL USE FOR REDUNDANCY

Power 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) Use separate input fuses for each power supply.
b) 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

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

Nov. 2019 / Rev. 1.0 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.

Observe the
temperature derating
requirements of Fig. 24-6
and Fig. 24-7 for n+1
redundancy applications.

30/32

R2,

240V

+10%

max.

L2

L1

L3

L

N

PE

Power Supply

AC

DC

CP20.241-R1, CP20.241-

CP-Series

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

24.8. OPERATION ON TWO PHASES

The 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

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

+10%

.

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: Rittal Typ IP66 Box PK 9519 100, plastic, 180x180x165mm

Load: 24V, 16A; (=80%) load is placed outside the box
Input: 230Vac
Temperature inside enclosure: 51.9°C (in the middle of the right side of the power supply with a distance of 2cm)
Temperature outside enclosure: 25.6°C
Temperature rise: 26.3K

Nov. 2019 / Rev. 1.0 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.

31/32

R2,

Power

Supply

OUTPUT

INPUT

Output Current

0

10 20 30 40

60°C

6

12

18

24A

50

A1

Ambient Temperature

Power

Supply

OUTPUT

INPUT

Output Current

0

10 20 30 40

60°C

6

12

18

24A

50

Ambient Temperature

A2

A1

Output Current

0

10 20 30 40

60°C

6

12

18

24A

50

Ambient Temperature

A1

A2

Power

Supply

OUTPUT

INPUT

Output Current

0

10 20 30 40

60°C

6

12

18

24A

50

Ambient Temperature

A1

A2

Power

Supply

OUTPUT

INPUT

Output Current

0

10 20 30 40

60°C

6

12

18

24A

50

Ambient Temperature

A1

A2

CP20.241-R1, CP20.241-

CP-Series

CP20.242-R2, CP20.241-R2-C1

24V, 20A, 480W, SINGLE PHASE

24.10. MOUNTING ORIENTATIONS

Mounting orientations other than all terminals on the bottom require a reduction in continuous output power or a
limitation in the maximum allowed ambient temperature. The amount of reduction influences the lifetime expectancy
of the power supply. Therefore, two different derating curves for continuous operation can be found below:

Curve A1 Recommended output current.
Curve A2 Max allowed output current (results in approximately half the lifetime expectancy of A1).

Fig. 24-10
Mounting
Orientation A

(Standard
orientation)

Fig. 24-11

Mounting
Orientation B

(Upside down)

Fig. 24-12

Mounting
Orientation C

(Table-top
mounting)

Fig. 24-13

Mounting
Orientation D

(Horizontal cw)

Fig. 24-14

Mounting
Orientation E

(Horizontal ccw)

Nov. 2019 / Rev. 1.0 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.

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