Puls CP20.481 Data Sheet

CP20.481

CP-Series

48V, 10A, SINGLE PHASE INPUT

1/28

POWER SUPPLY

▪ AC 100-240V Wide-range Input
▪ Width only 48mm
▪ Efficiency up to 96.3%
▪ Excellent Partial Load Efficiency
▪ 20% Output Power Reserves
▪ Safe Hiccup

PLUS®

Overload Mode

▪ Easy Fuse Breaking – 3 times nominal current for 12ms
▪ Active Power Factor Correction (PFC)
▪ Minimal Inrush Current Surge
▪ Full Power Between -25°C and +60°C
▪ DC-OK Relay Contact
▪ Current Sharing Feature for Parallel Use
▪ 3 Year Warranty

PRODUCT DESCRIPTION

The Dimension CP-Series are cost optimized power supplies

SHORT-FORM DATA

Output voltage

DC 48V

Nominal

Adjustment range

48 - 56V

Factory setting 48.0V

Output current

12.0 - 10.3A

Below +45°C ambient

10.0 - 8.6A

At +60°C ambient

7.5 - 6.5A

At +70°C ambient

Derate between +45°C and +70°C

AC Input voltage AC

AC 100-240V

-15%/+10%

Mains frequency

50-60Hz

±6%

Input current AC

4.26 / 2.23A

At 120 / 230Vac

Power factor

0.99 / 0.98

At 120 / 230Vac

Input voltage DC

DC 110-150V

±20%

Input current DC

4.64A

At 110Vdc

AC Inrush current

typ. 10.0 / 4.5A

at 120 / 230Vac

Efficiency

95.0 / 96.3%

at 120 / 230Vac

Losses

25.1 / 18.4W

at 120 / 230Vac

Hold-up time

typ. 32 / 32ms

at 120 / 230Vac

Temperature range

-25°C to +70°C

operational

Size (WxHxD)

48x124x127mm

Without DIN-rail

Weight

830g / 1.83lb

ORDER NUMBERS

MAIN APPROVALS

Ind. Cont. Eq.

without compromising quality, reliability and performance. The
most outstanding features of CP20.481 are the high efficiency,
electronic inrush current limitation, active PFC, wide operational
temperature range. The small size is achieved by a synchronous
rectification, LLC technology and by many further technological
design details.

Products of the CP series come with essential functions. The
CP20.481 has a power reserve of 20% included, which may even
be used continuously at temperatures up to +45°C. Additionally,
the device can deliver about 3 times the nominal output current
for 12ms which helps to trip fuses on faulty output branches.

High immunity to transients and power surges as well as low
electromagnetic emission, a DC-OK relay contact and a large
international approval package for a variety of applications
makes this unit suitable for nearly every situation.

Power Supply CP20.481

Mechanical Accessory

ZM10.Wall Wall/Panel mount bracket

May 2020 / Rev. 1.1 DS-CP20.481-EN All parameters are specified at 230Vac, 50Hz input voltage, 48V, 10A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.

For a complete list of approvals see section 19.

CP20.481

CP-Series

48V, 10A, SINGLE PHASE INPUT

2/28

INDEX

Page Page

TERMINOLOGY AND ABREVIATIONS

1. Intended Use ................................................................ 3

2. Installation Instructions ................................................ 3

3. AC-Input ....................................................................... 4

4. DC-Input ....................................................................... 5

5. Input Inrush Current ..................................................... 6

6. Output .......................................................................... 7

7. Hold-up Time ................................................................ 9

8. DC-OK Relay Contact .................................................... 9

9. Efficiency and Power Losses ....................................... 10

10. Functional Diagram .................................................... 11

11. Front Side and User Elements .................................... 11

12. Connection Terminals ................................................ 12

13. Lifetime Expectancy ................................................... 13

14. MTBF .......................................................................... 13

15. EMC ............................................................................ 14

16. Environment ............................................................... 15

17. Safety and Protection Features .................................. 16

18. Dielectric Strength ...................................................... 17

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 (available under www.pulspower.com).

No part of this document may be reproduced or utilized in any form without our prior permission in writing.
Packaging and packaging aids can and should always be recycled. The product itself may not be disposed of as domestic refuse.

19. Approvals ................................................................... 18

20. Other Fulfilled Standards ........................................... 18

21. Physical Dimensions and Weight ............................... 19

22. Accessories................................................................. 20

22.1. ZM10.WALL – Wall/Panel Mount Bracket ........ 20

22.2. UF20.481 Buffer Module .................................. 21

22.3. YR40.482 - Redundancy Module ...................... 21

23. Application Notes....................................................... 22

23.1. Peak Current Capability .................................... 22

23.2. Output Circuit Breakers .................................... 23

23.3. Charging of Batteries ........................................ 24

23.4. Series Operation ............................................... 24

23.5. Parallel Use to Increase Output Power ............ 25

23.6. Parallel Use for Redundancy ............................ 26

23.7. Operation on Two Phases ................................ 27

23.8. Use in a Tightly Sealed Enclosure ..................... 27

23.9. Mounting Orientations ..................................... 28

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.

May 2020 / Rev. 1.1 DS-CP20.481-EN All parameters are specified at 230Vac, 50Hz input voltage, 48V, 10A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.

CP20.481

CP-Series

48V, 10A, SINGLE PHASE INPUT

3/28

1. INTENDED USE

This device is designed for installation in an enclosure and is intended for commercial use, such as in industrial control, process control,

2. INSTALLATION INSTRUCTIONS

WARNING

monitoring and measurement equipment or the like.
Do not use this device in equipment where malfunction may cause severe personal injury or threaten human life.

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

- Turn power off before working on the device. Protect against inadvertent re-powering.

- 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 instructions:

This device may only be installed and put into operation by qualified personnel.
This device does not contain serviceable parts. The tripping of an internal fuse is caused by an internal defect.
If damage or malfunction should occur during installation or operation, immediately turn power off and send unit to the factory for
inspection.
Install the device in an enclosure providing protection against electrical, mechanical and fire hazards.
Install the device onto a DIN-rail according to EN 60715 with the input terminals on the bottom of the device. Other mounting
orientations require a reduction in output current.
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.
Unused screw terminals should be securely tightened.
The device is designed for pollution degree 2 areas in controlled environments. No condensation or frost is allowed.
The enclosure of the device provides a degree of protection of IP20.

The isolation of the device is designed to withstand impulse voltages of overvoltage category III according to IEC 60664-1. Above 2000m
the overvoltage category is reduced to level II.

The device is designed as “Class of Protection I” equipment according to IEC 61140.
Do not use without a proper PE (Protective Earth) connection. Use the terminal on the input block for earth connection and not one of
the screws on the housing.
The device is suitable to be supplied from TN-, TT- and IT mains networks. The voltage between the L or N terminal and the PE terminal
must not exceed 300Vac continuously.
The input can also be powered from batteries or similar DC sources. The voltage between the input terminal and the PE terminal must
not exceed 375Vdc continuously.
A disconnecting means shall be provided for the input of the device.
The device is designed for convection cooling and does not require an external fan. Do not obstruct airflow and do not cover ventilation
grid!
The device is designed for altitudes up to 6000m (19685ft). See additional requirements in this document for use above 2000m (6560ft).
Keep the following minimum installation clearances: 40mm on top, 20mm on the bottom, 5mm left and right side. Increase the 5mm to
15mm in case the adjacent device is a heat source. When the device is permanently loaded with less than 50%, the 5mm can be reduced
to zero.
The device is designed, tested and approved for branch circuits up to 32A (IEC) and 30A (UL) without additional protection device. If an
external fuse is utilized, do not use circuit breakers smaller than 10A B- or C-Characteristic to avoid a nuisance tripping of the circuit
breaker.
The maximum surrounding air temperature is +70°C (+158°F). The operational temperature is the same as the ambient or surrounding
air temperature and is defined 2cm below the device.
The device is designed to operate in areas between 5% and 95% relative humidity.

May 2020 / Rev. 1.1 DS-CP20.481-EN All parameters are specified at 230Vac, 50Hz input voltage, 48V, 10A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.

CP20.481

CP-Series

48V, 10A, SINGLE PHASE INPUT

4/28

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.

AC input

nom.

AC 100-240V

AC input range

85-264Vac

Continuous operation

264-300Vac

Occasionally for maximal 500ms

Allowed voltage L or N to earth

max.

300Vac

Continuous, according to IEC 60664-1

Input frequency

nom.

50–60Hz

±6%

Turn-on voltage

typ.

82Vac

Steady-state value, see Fig. 3-1

Shut-down voltage

typ.

72Vac

Steady-state value, see Fig. 3-1

External input protection

See recommendations in chapter 2.

AC 100V

AC 120V

AC 230V

Input current

typ.

5.15A

4.26A

2.23A

At 48V, 10A, see Fig. 3-3

Power factor

typ.

0.996

0.996

0.980

At 48V, 10A, see Fig. 3-4

Crest factor

typ.

1.65

1.63

1.63

At 48V, 10A, The crest factor is the
mathematical ratio of the peak value to
RMS value of the input current
waveform.

Start-up delay

typ.

450ms

450ms

450ms

See Fig. 3-2

Rise time

typ.

120ms

120ms

120ms

At 48V, 10A const. current load, 0mF
load capacitance, see Fig. 3-2

typ.

170ms

170ms

170ms

At 48V, 10A const. current load, 10mF
load capacitance, see Fig. 3-2

Turn-on overshoot

max.

500mV

500mV

500mV

In single use mode, see Fig. 3-2

Fig. 3-1 Input voltage range

Fig. 3-2 Turn-on behavior, definitions

Turn-on

85V

Rated

input range

max.

500ms

V

IN

P

OUT

300Vac264V

Shut-down

Start-up

delay

Rise

Time

Overshoot

-5%

Output
Voltage

Input
Voltage

Fig. 3-3 Input current vs. output current at 48V output

voltage

Fig. 3-4 Power factor vs. output current at 48V output

voltage

12A

1 2 3 4 5 6 7 8 9

0

1

2

3

4

5

6A

Input Current, typ.

10 11

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

b

a

c

Output Current

Power Factor, typ.

1 2 3 4 5 6 7 8 9 12A

0.75

0.8

0.85

0.9

0.95

1.0

10 11

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

a, b

c

Output Current

May 2020 / Rev. 1.1 DS-CP20.481-EN All parameters are specified at 230Vac, 50Hz input voltage, 48V, 10A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.

CP20.481

CP-Series

48V, 10A, SINGLE PHASE INPUT

5/28

4. DC-INPUT

The device is suitable to be supplied from a DC input voltage. Use a battery or a similar DC source. A supply from the intermediate DC-

DC input

Nom.

DC 110-150V

±20%

DC input range

88-180Vdc

Continuous operation

DC input current

typ.

4.64A

At 110Vdc, at 24V, 20A

Allowed Voltage (+) or (-) input to
Earth

max.

375Vdc

Continuous according to IEC 60664-1

Turn-on voltage

typ.

80Vdc

Steady state value

Shut-down voltage

typ.

70Vdc

Steady state value

Fig. 4-1 Wiring for DC Input

+

-

Load

L

PE

+

-

Power Supply

AC

DC

Battery

N

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.

May 2020 / Rev. 1.1 DS-CP20.481-EN All parameters are specified at 230Vac, 50Hz input voltage, 48V, 10A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.

CP20.481

CP-Series

48V, 10A, SINGLE PHASE INPUT

6/28

5. INPUT INRUSH CURRENT

An active inrush limitation circuit limits the input inrush current after turn-on of the input voltage.

AC 100V

AC 120V

AC 230V

Inrush current

max.

15A

peak

12A

peak

5.5A

peak

Temperature independent

typ.

12A

peak

10A

peak

4.5A

peak

Temperature independent

Inrush energy

max.

1A2s

1A2s

1A2s

Temperature independent

Fig. 5-1 Typical input inrush current behaviour at

nominal load and 25°C ambient

Output

100mS/DIV

Input

230Vac

48Vdc

Input Current 5A / DIV

The charging current into EMI suppression capacitors is disregarded in the first microseconds after switch-on.

May 2020 / Rev. 1.1 DS-CP20.481-EN All parameters are specified at 230Vac, 50Hz input voltage, 48V, 10A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.

CP20.481

CP-Series

48V, 10A, SINGLE PHASE INPUT

7/28

6. OUTPUT

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

Output voltage

nom.

48V

Adjustment range

min.

48-56V

Guaranteed value

max.

60V

This is the maximum output voltage which can occur at the
clockwise end position of the potentiometer due to
tolerances. It is not a guaranteed value which can be
achieved.

Factory setting output voltage

typ.

48.0V

±0.2% in “single use” mode at full load, cold unit

typ.

47.0V

±0.2% in “parallel use” mode at 10A, cold unit (results to

46.6V ±0.2% at 12A and 49.0V ±0.2% at no load)

Line regulation

Max.

10mV

Between 85 and 300Vac input voltage change

Load regulation

Max.

150mV

Between 0 and 10A in “single use” mode, static value

Typ.

2000mV

Between 0 and 10A in “parallel use” mode, static value, see
Fig. 6-2

Ripple and noise voltage

max.

50mVpp

Bandwidth 20Hz to 20MHz, 50Ohm

Output current

nom.

12A1)

At 48V and an ambient temperature below 45°C

nom.

10A

At 48V and 60°C ambient temperature

nom.

7.5A

At 48V and 70°C ambient temperature

nom.

10.3A1)

At 56V and an ambient temperature below 45°C

nom.

8.6A

At 56V and 60°C ambient temperature

Nom.

6.5A

At 56V and 70°C ambient temperature

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

Fuse breaking current

typ.

30A

Up to 12ms once every five seconds, see Fig. 6-4.
The fuse braking current is an enhanced transient current

which helps to trip fuses on faulty output branches. The
output voltage stays above 40V.

Overload behavior

Continuous current

For output voltage above 26Vdc, see Fig. 6-1

Intermittent current2)

For output voltage below 26Vdc, see Fig. 6-1

Overload/ short-circuit current

max.

14.8A

Continuous current, see Fig. 6-1

typ.

15A

Intermitted current peak value for typ. 2s
Load impedance 10mOhm, see Fig. 6-3
Discharge current of output capacitors is not included.

max.

4.7A

Intermitted current average value (R.M.S.)
Load impedance 10mOhm, see Fig. 6-3

Output capacitance

typ.

2 500µF

Included inside the power supply

Back-feeding loads

max.

63V

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.

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 > 0.25F are connected to the output, the unit might charge the
capacitor in an intermittent mode.

The output is electronically protected against overload, no-load and short-circuits. In case of a protection event, audible noise may
occur.

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.

May 2020 / Rev. 1.1 DS-CP20.481-EN All parameters are specified at 230Vac, 50Hz input voltage, 48V, 10A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.

CP20.481

CP-Series

48V, 10A, SINGLE PHASE INPUT

8/28

2) 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

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

Fig. 6-2 Output voltage in “parallel use” mode, typ.

Output Voltage

(Single Use, typ.)

0

0 12.5

8

16

24

56V

32

40

48

20A7.52.5 5 10 15 17.5

Adjustment

Range

Output Current

A: continuous current
B: intermitted current

A

B

Output Voltage

(Parallel Use, typ.)

43V

0 4 8

45V

47V

49V

57V

51V

53V

55V

12A1062

Adjustment

Range

Factory
setting

Output Current

Fig. 6-3 Short-circuit on output, Hiccup

PLUS®

mode, typ.

Fig. 6-4 Dynamic overcurrent capability, typ.

Output
Current

0

15A

18s

18s

18s

2s

2s

2s

t

Short -circuit

Normal

operation

Normal

operation

Output Voltage

(dynamic behavior, < 12ms)

0

0

8

16

24

56V

32

40

48

35A155 20 2510 30

Adjustment

Range

Output Current

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. 6-3.

May 2020 / Rev. 1.1 DS-CP20.481-EN All parameters are specified at 230Vac, 50Hz input voltage, 48V, 10A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.

CP20.481

CP-Series

48V, 10A, SINGLE PHASE INPUT

9/28

7. HOLD-UP TIME

The hold-up time is the time during which a power supply’s output voltage remains within specification following the loss of input

AC 100V

AC 120V

AC 230V

Hold-up Time

typ.

65ms

65ms

65ms

At 48V, 5A, see Fig. 7-1

min.

54ms

54ms

54ms

At 48V, 5A, see Fig. 7-1

typ.

32ms

32ms

32ms

At 48V, 10A, see Fig. 7-1

min.

24ms

24ms

24ms

At 48V, 10A, see Fig. 7-1

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

Fig. 7-2 Shut-down behavior, definitions

0

10

20

30

40

80ms

85 120 155 190 230Vac

Input Voltage

50

60

Hold-up Time

48V, 10A, typ.

48V, 5A, min.

48V, 5A, typ.

70

48V, 10A, min.

-5%

Hold-up Time

Zero Transition

Output
Voltage

Input
Voltage

8. DC-OK RELAY CONTACT

Contact closes

As soon as the output voltage reaches typ. 90% of the adjusted output voltage level.

Contact opens

As soon as the output voltage dips more than 10% below the adjusted output voltage.
Short dips will be extended to a signal length of 100ms. Dips shorter than 1ms will be ignored.

Switching hysteresis

2V

Contact ratings

Maximal 60Vdc 0.3A, 30Vdc 1A, 30Vac 0.5A, resistive load

Minimal permissible load: 1mA at 5Vdc

Isolation voltage

See dielectric strength table in section 18.

Fig. 8-1 DC-ok relay contact behavior

100ms

0.9* V

ADJ

<

1ms

10%

open

V

OUT

= V

ADJ

openclosed closed

>

1ms

power. The hold-up time is output load dependent. At no load, the hold-up time can be up to several seconds. The green DC-ok lamp is
also on during this time.

This feature monitors the output voltage on the output terminals of a running power supply.

May 2020 / Rev. 1.1 DS-CP20.481-EN All parameters are specified at 230Vac, 50Hz input voltage, 48V, 10A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.

CP20.481

CP-Series

48V, 10A, SINGLE PHASE INPUT

10/28

9. EFFICIENCY AND POWER LOSSES

AC 100V

AC 120V

AC 230V

Efficiency

typ.

94.4%

95.0%

96.3%

At 48V, 10A

typ.

94.2%

94.9%

96.2%

At 48V, 12A (Power Boost)

Average efficiency*)

typ.

94.1%

94.6%

95.5%

25% at 2.5A, 25% at 5A,
25% at 7.5A. 25% at 10A

Power losses

typ.

2.7W

2.4W

2.4W

At 48V, 0A

typ.

14.2W

12.5W

10.6W

At 48V, 5A

typ.

28.5W

25.1W

18.4W

At 48V, 10A

typ.

35.4W

31.0W

22.7W

At 48V, 12A (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

Fig. 9-1 Efficiency vs. output current at 48V, typ.

Fig. 9-2 Losses vs. output current at 48V, typ.

Efficiency

2 3 4 5 6 7 9 10 12A

89

90

91

92

93

94

95

96

97%

Output Current

8 11

(a)

(b)

(c)

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

Power Losses

0 1 3 4 6 7 12A

5
0

10

20

30

40W

9 102 5 8

Output Current

11

(a)
(b)

(c)

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

35

25

15

Fig. 9-3 Efficiency vs. input voltage at 48V, 10A, typ.

Fig. 9-4 Losses vs. input voltage at 48V, 10A, typ.

Efficiency

120 180 230 264Vac

91

92

93

94

Input Voltage

95

96

97%

100

Power Losses

120 180 230 264Vac

10

15

20

25

Input Voltage

30

35

40W

100

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.

May 2020 / Rev. 1.1 DS-CP20.481-EN All parameters are specified at 230Vac, 50Hz input voltage, 48V, 10A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.

CP20.481

CP-Series

48V, 10A, SINGLE PHASE INPUT

11/28

10. FUNCTIONAL DIAGRAM

Fig. 10-1 Functional diagram

Output

Over-

Voltage

Protection

PFC

Converter

Output

Voltage

Regulator

Power

Converter

Output

Filter

Output
Voltage
Monitor

Output

Power

Manager

Temper-

ature
Shut-

down

Input Fuse
Input Filter
Input Rectifier
Active Inrush Limiter

V

OUT

L

N

DC-ok
Contact

DC-ok
LED

Link for
Parallel
Use

DC-ok
Relay

+

+

-

-

-

11. FRONT SIDE AND USER ELEMENTS

Fig. 11-1 Front side

A Input Terminals

N, L Line input

PE (Protective Earth) input

B Output Terminals

+ Positive output (two identical + poles)

– Negative/ return output (three identical - poles)

C Output voltage potentiometer

Open the flap to adjust the output voltage. The factory setting is 48.0V

D DC-OK LED (green)

On, when the output voltage is >90% of the adjusted output voltage

E DC-OK Relay Contact

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

F “Parallel Use” “Single Use” link

Link the two terminal poles when power supplies are connected in parallel to increase the
output power. In order to achieve a sharing of the load current between the individual

power supplies, the “parallel use” 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 23.5.

May 2020 / Rev. 1.1 DS-CP20.481-EN All parameters are specified at 230Vac, 50Hz input voltage, 48V, 10A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.

CP20.481

CP-Series

48V, 10A, SINGLE PHASE INPUT

12/28

12. CONNECTION TERMINALS

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

Input

Output

Signal Terminals

Type

Screw termination

Screw termination

Push-in termination

Solid wire

max. 6mm2

max. 6mm2

max. 1.5mm2

Stranded wire

max. 4mm2

max. 4mm2

max. 1.5mm2

American Wire Gauge

AWG 20-10

AWG 20-10

AWG 24-16

Max. wire diameter (including ferrules)

2.8mm

2.8mm

1.6mm

Recommended tightening torque

1Nm, 9lb-in

1Nm, 9lb-in

-

Wire stripping length

7mm / 0.28inch

7mm / 0.28inch

7mm / 0.28inch

Screwdriver

3.5mm slotted or cross­head No 2

3.5mm slotted or cross­head No 2

3mm slotted to open the
spring

Fig. 12-1 Daisy chaining of outputs

Fig. 12-2 Using distribution terminals

Load

+

-

Power

Supply

+ +

- -

Output

Power

Supply

+ +

- -

Output

max 25A!

continuous

Distribution
Terminals

Load

+

-

Power

Supply

+ +

- -

Output

Power

Supply

+ +

- -

Output

Daisy chaining:

Daisy chaining (jumping from one power supply output to the next) is allowed as long as the average output current through one
terminal pin does not exceed 25A. If the current is higher, use a separate distribution terminal block as shown in Fig. 12-2.

May 2020 / Rev. 1.1 DS-CP20.481-EN All parameters are specified at 230Vac, 50Hz input voltage, 48V, 10A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.

CP20.481

CP-Series

48V, 10A, SINGLE PHASE INPUT

13/28

13. LIFETIME EXPECTANCY

The Lifetime expectancy shown in the table indicates the minimum operating hours (service life) and is determined by the lifetime

AC 100V

AC 120V

AC 230V

Lifetime expectancy

52 000h

66 000h

110 000h

At 48V, 10A and 40°C

130 000h

152 000h

180 000h

At 48V, 5A and 40°C

33 000h

45 000h

8 9 000h

At 48V, 12A and 40°C

148 000h

188 000h

311 000h

At 48V, 10A and 25°C

368 000h

431 000h

509 000h

At 48V, 5A and 25°C

93 000h

128 000h

251 000h

At 48V, 12A and 25°C

14. MTBF

AC 100V

AC 120V

AC 230V

MTBF SN 29500, IEC 61709

430 000h

443 000h

540 000h

At 48V, 10A and 40°C

790 000h

810 000h

973 000h

At 48V, 10A and 25°C

MTBF MIL HDBK 217F

207 000h

209 000h

244 000h

At 48V, 10A and 40°C; Ground Benign GB40

279 000h

283 000h

334 000h

At 48V, 10A and 25°C; Ground Benign GB25

44 000h

45 000h

54 000h

At 48V, 10A and 40°C; Ground Fixed GF40

58 000h

59 000h

72 000h

At 48V, 10A and 25°C; Ground Fixed GF25

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.

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 cannot 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.

May 2020 / Rev. 1.1 DS-CP20.481-EN All parameters are specified at 230Vac, 50Hz input voltage, 48V, 10A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.

CP20.481

CP-Series

48V, 10A, SINGLE PHASE INPUT

14/28

15. EMC

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

EMC Immunity

Electrostatic discharge

EN 61000-4-2

Contact discharge
Air discharge

8kV
15kV

Criterion A
Criterion A

Electromagnetic RF field

EN 61000-4-3

80MHz-2.7GHz

20V/m

Criterion A

Fast transients (Burst)

EN 61000-4-4

Input lines
Output lines
DC-OK signal (coupling clamp)

4kV
2kV
2kV

Criterion A
Criterion A
Criterion A

Surge voltage on input

EN 61000-4-5

L → N
L → PE, N → PE

2kV
4kV

Criterion A
Criterion A

Surge voltage on output

EN 61000-4-5

+ → -
+ / - → PE

1kV
2kV

Criterion A
Criterion A

Surge voltage on DC-OK

EN 61000-4-5

DC-OK signal → PE

1kV

Criterion A

Conducted disturbance

EN 61000-4-6

0.15-80MHz

20V

Criterion A

Mains voltage dips

EN 61000-4-11

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

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

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

Voltage interruptions

EN 61000-4-11

0% of 200Vac (=0V)

5000ms

Criterion C

Powerful transients

VDE 0160

Over entire load range

750V, 0.3ms

Criterion A

EMC Emission

Conducted emission
input lines

EN 55011, EN 55022, FCC Part 15, CISPR 11, CISPR 22

Class B

Radiated emission

EN 55011, EN 55022

Class B

Harmonic input current

EN 61000-3-2

Fulfilled for Class A equipment
Fulfilled for Class C equipment in the
load range from 4 to 12A

Voltage fluctuations, flicker

EN 61000-3-3

Fulfilled, tested with constant current
loads, no 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.

Switching Frequencies

PFC converter

100kHz

Fixed frequency

Main converter

80kHz to 140kHz

Output load dependent

Auxiliary converter

60kHz

Fixed frequency

industry environments.
The device is investigated according to EN 61000-6-1, EN 61000-6-2, EN 61000-6-3 and EN 61000-6-4.

Without additional measures to reduce the conducted emissions on the output (e.g. by using a filter), the
device is not suited to supply a local DC power network in residential, commercial and light-industrial
environments. No restrictions apply for local DC power networks in industrial environments.

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

May 2020 / Rev. 1.1 DS-CP20.481-EN All parameters are specified at 230Vac, 50Hz input voltage, 48V, 10A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.

CP20.481

CP-Series

48V, 10A, SINGLE PHASE INPUT

15/28

16. ENVIRONMENT

Operational temperature

-25°C to +70°C (-13°F to 158°F)

The operational temperature is the ambient or
surrounding temperature and is defined as the air
temperature 2cm below the device.

Storage temperature

-40°C to +85°C (-40°F to 185°F)

For storage and transportation

Output de-rating

6.4W/°C
12W/°C

0.66A/1000m or 5°C/1000m

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. 16-2

The de-rating is not hardware controlled. The user has to take care by himself to stay below the de­rated current limits in order not to overload the unit.

Humidity

5 to 95% r.h.

According to IEC 60068-2-30

Atmospheric pressure

110-47kPa

See Fig. 16-2 for details

Altitude

Up to 6000m (19685ft)

See Fig. 16-2 for details

Over-voltage category

III

According to IEC 60664-1 for altitudes up to 2000m

II

According to IEC 60664-1, for altitudes above 2000m

Degree of pollution

2

According to IEC 62477-1, not conductive

Vibration sinusoidal

2-17.8Hz: ±1.6mm

17.8-500Hz: 2g
2 hours / axis

According to IEC 60068-2-6

Shock

30g 6ms, 20g 11ms
3 bumps / direction
18 bumps in total

According to IEC 60068-2-27
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.

LABS compatibility

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.

Corrosive gases

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.

Audible noise

Some audible noise may be emitted from the power supply during no load, overload or short circuit.

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

Fig. 16-2 Output current vs. altitude

Allowed Output Current at 48V

0

-25 0

45

70°C

7.5A

10A

12A

60

B

A

Ambient Temperature

A...90 to 264Vac, continuous
B... short term

(max. 60s every 10 minutes)

2000m 6000m

7.3A

10A

12A

Altitude

Allowed Output Current at 48V

B

A

D

AP

*)

80kPa 47kPa110kPa

0m

*) Atmospheric pressure

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

May 2020 / Rev. 1.1 DS-CP20.481-EN All parameters are specified at 230Vac, 50Hz input voltage, 48V, 10A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.

CP20.481

CP-Series

48V, 10A, SINGLE PHASE INPUT

16/28

17. SAFETY AND PROTECTION FEATURES

Isolation resistance

min.

500MOhm

At delivered condition between input and output,

measured with 500Vdc

min.

500MOhm

At delivered condition between input and PE, measured

with 500Vdc

min.

500MOhm

At delivered condition between output and PE, measured

with 500Vdc

min.

500MOhm

At delivered condition between output and DC-OK

contacts, measured with 500Vdc

PE resistance

max.

0.1Ohm

Resistance between PE terminal and the housing in the

area of the DIN-rail mounting bracket.

Output over-voltage protection

typ.

58.5Vdc

max.

60Vdc

In case of an internal defect, a redundant circuit limits the maximum output voltage.
The output shuts down and automatically attempts to restart.

Class of protection

I

According to IEC 61140

A PE (Protective Earth) connection is required

Degree of protection

IP 20

According to EN/IEC 60529

Over-temperature protection

Included

Output shuts down with automatic restart.

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.

Input transient protection

MOV (Metal Oxide
Varistor)

For protection values see chapter 15 (EMC).

Internal input fuse

Included

Not user replaceable slow-blow high-braking capacity fuse

Touch current (leakage current)

typ.

0.12mA / 0.31mA

At 100Vac, 50Hz, TN-,TT-mains / IT-mains

typ.

0.18mA / 0.45mA

At 120Vac, 60Hz, 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

May 2020 / Rev. 1.1 DS-CP20.481-EN All parameters are specified at 230Vac, 50Hz input voltage, 48V, 10A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.

CP20.481

CP-Series

48V, 10A, SINGLE PHASE INPUT

17/28

18. DIELECTRIC STRENGTH

The output voltage is floating and has no ohmic connection to the ground.

Fig. 18-1 Dielectric strength

A B C

D

A D

C

B

B

*)

N

L

Input DC-ok

Earth, PE

Output

-

+

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

> 10mA

> 10mA

> 20mA

> 1mA

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.

The output is insulated to the input by a double or reinforced insulation.
Type and routine tests are conducted by the manufacturer. Field tests may be conducted in the field using 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.

We recommend that either the + pole or the – pole shall be connected to the protective earth system. This helps to avoid situations in
which a load starts unexpectedly or cannot be switched off when unnoticed earth faults occur.

May 2020 / Rev. 1.1 DS-CP20.481-EN All parameters are specified at 230Vac, 50Hz input voltage, 48V, 10A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.

CP20.481

CP-Series

48V, 10A, SINGLE PHASE INPUT

May 2020 / Rev. 1.1 DS-CP20.481-EN All parameters are specified at 230Vac, 50Hz input voltage, 48V, 10A output load,

18/28

19. APPROVALS

IEC 61010-2-201

IEC 61010-2-201 Electrical Equipment for Measurement,

Control and Laboratory Use - Particular requirements for

control equipment

IEC 62368-1

IEC 62368-1 Audio/video, information and communication

technology equipment - Safety requirements

Output safety level: ES1

UL 61010-2-201

Listed equipment for category NMTR - UL 61010-2-201

Electrical Equipment for Measurement, Control and Laboratory

Use - Particular requirements for control equipment

Applicable for US and Canada

E-File: E198865

EN 60079-0, EN 60079-7
ATEX

EN 60079-0 Explosive atmospheres - General requirements

EN 60079-7, EN 60079-15 Equipment protection by type of

protection "e" and "n"

Temperature Code: T4

Type of Protection: ec nC

Certificate: EPS 17 ATEX 1 089 X

IEC 60079-0, IEC 60079-7

IECEx

IEC 60079-0 Explosive atmospheres - General requirements

IEC 60079-7, IEC 60079-15 Equipment protection by type of

protection "e" and "n"

Temperature Code: T4

Type of Protection: ec nC

Certificate: IECEx EPS 17.0046X

IND. CONT. EQ. FOR HAZ. LOC.
Class I Div 2 T4

Listed equipment for category NRAD - Listed equipment

Industrial Control Equipment for Use in Hazardous Locations

Applicable for USA and Canada

Temperature Code: T4

Groups: A, B, C, D

E-File: E327416

EAC TR Registration

Registration for the Eurasian Customs Union market

(Russia, Kazakhstan, Belarus)

20. OTHER FULFILLED STANDARDS

EC Declaration of Conformity

The CE mark indicates conformance with the

- RoHS directive

- EMC directive and the

- Low-voltage directive (LVD)

REACH Directive

Directive 1907/2006/EU of the European Parliament and the

Council of June 1st, 2007 regarding the Registration, Evaluation,

Authorisation and Restriction of Chemicals (REACH)

IEC/EN 61558-2-16
(Annex BB)
planned

Safety Isolating Transformer

Safety Isolating Transformers corresponding to Part 2-6 of the

IEC/EN 61558

25°C ambient and after a 5 minutes run-in time unless otherwise noted.

CP20.481

CP-Series

48V, 10A, SINGLE PHASE INPUT

May 2020 / Rev. 1.1 DS-CP20.481-EN All parameters are specified at 230Vac, 50Hz input voltage, 48V, 10A output load,

19/28

21. PHYSICAL DIMENSIONS AND WEIGHT

Width

48mm 1.89’’

Height

124mm 4.88’’

Depth

127mm 5.0’’
The DIN-rail height must be added to the unit depth to calculate the total required installation depth.

Weight

830g / 1.83lb

DIN-Rail

Use 35mm DIN-rails according to EN 60715 or EN 50022 with a height of 7.5 or 15mm.

Housing material

Body: Aluminium alloy
Cover: zinc-plated steel

Installation clearances

See chapter 2

Penetration protection

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

Fig. 21-1 Front view

Fig. 21-2 Side view

All dimensions in mm

All dimensions in mm

25°C ambient and after a 5 minutes run-in time unless otherwise noted.

CP20.481

CP-Series

48V, 10A, SINGLE PHASE INPUT

20/28

22. ACCESSORIES

22.1. ZM10.WALL – WALL/PANEL MOUNT BRACKET

Fig. 22.1-1 Isometric view

Fig. 22.1-2 Isometric view

Fig. 22.1-3 Isometric view

Fig. 22.1-4 Wall/panel mounting, front view

Fig. 22-5 Hole pattern for wall mounting

Fig. 22.1-6 Wall/panel mounting, side view

This 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. Product for illustration purpose only.

May 2020 / Rev. 1.1 DS-CP20.481-EN All parameters are specified at 230Vac, 50Hz input voltage, 48V, 10A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.

CP20.481

CP-Series

48V, 10A, SINGLE PHASE INPUT

21/28

22.2. UF20.481 BUFFER MODULE

The UF20.481 buffer module is a supplementary device for DC 48V power supplies. It delivers power to bridge
typical mains failures or extends the hold-up time after the AC power is turned off.

When the power supply provides a sufficient voltage, the buffer module stores energy in the integrated
electrolytic capacitors. When the mains voltage is lost, the stored energy is released to the DC-bus in a regulated
process.

The buffer module can be added in parallel to the load circuit at any given point and does not require any
control wiring.

One buffer module can deliver 20A additional current and can be added in parallel to increase the output
ampacity or the hold-up time.

22.3. YR40.482 - REDUNDANCY MODULE

The YR40.482 is a dual redundancy module, which can be used to build 1+1 or N+1 redundant systems.
The device is equipped with two 20A nominal input channels, which are individually decoupled by utilizing MOSFET

technology. The output can be loaded with a nominal 40A continuous current.
Using MOSFETSs instead of diodes reduces heat generation, losses and voltage drop between input and output.

Due to these advantages, the unit is very narrow and only requires 46mm width on the DIN-rail.
The device does not require an additional auxiliary voltage and is self-powered even in case of a short circuit across

the output. It requires suitable power supplies on the input, where the sum of the continuous short circuit current
stays below 45A. This is typically achieved when the power supplies are featured with an intermittent overload
behavior (Hiccup Mode).

See chapter 23.6 for wiring information.

May 2020 / Rev. 1.1 DS-CP20.481-EN All parameters are specified at 230Vac, 50Hz input voltage, 48V, 10A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.

CP20.481

CP-Series

48V, 10A, SINGLE PHASE INPUT

22/28

23. APPLICATION NOTES

23.1. PEAK CURRENT CAPABILITY

Fig. 23-1 20A peak current for 50ms, typ.

(2x the nominal current)

Fig. 23-2 50A peak current for 5ms, typ.

(5x the nominal current)

10ms/DIV

Output
Voltage

Output
Current

48V

0A

20A

36V

1ms/DIV

Output Voltage

Output
Current

48V

0A

50A

32V

Fig. 23-3 30A peak current for 12ms, typ.

(3x the nominal current)

1ms/DIV

Output
Voltage

Output
Current

48V

0A

30A

12ms

45V

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

Peak current voltage dips

typ.

from 48V to 36V

At 20A for 50ms, resistive load

typ.

from 48V to 39V

At 50A for 2ms, resistive load

typ.

from 48V to 32V

At 50A for 5ms, resistive load

The unit can deliver peak currents (up to several milliseconds) which are higher than the specified short term currents.
This helps to start current demanding loads. Solenoids, contactors and pneumatic modules often have a steady state coil and a pick-up

coil. The inrush current demand of the pick-up coil is several times higher than the steady-state current and usually exceeds the nominal
output current. The same situation applies when starting a capacitive load.

The peak current capability also ensures the safe operation of subsequent circuit breakers of load circuits. The load branches are often
individually protected with circuit breakers or fuses. In case of a short or an overload in one branch circuit, the fuse or circuit 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:

May 2020 / Rev. 1.1 DS-CP20.481-EN All parameters are specified at 230Vac, 50Hz input voltage, 48V, 10A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.

CP20.481

CP-Series

48V, 10A, SINGLE PHASE INPUT

23/28

23.2. OUTPUT CIRCUIT BREAKERS

Fig. 23-4 Test circuit for maximum wire length

Test results for maximum wire length:

MCB

Power Supply

AC

DC

+

-

+

-

Load

Wire length

S1... Fault simulation switch

S1

0.75mm²

1.0mm²

1.5mm²

2.5mm²

C-2A

85 m

117 m

165 m

>200m

C-3A

54 m

85 m

117 m

176 m

C-4A

35 m

48 m

65 m

107 m

C-6A

13 m

19 m

25 m

39 m

C-8A

4 m

7 m

9 m

14 m

C-10A

3 m

6 m

8 m

13 m

C-13A

1 m

1 m

1 m

B-6A

36 m

52 m

75 m

116 m

B-10A

12 m

20 m

25 m

39 m

B-13A

9 m

13 m

17 m

28 m

B-16A

2 m

3 m

5 m

6 m

Standard miniature circuit breakers (MCB’s or UL 1077 circuit breakers) are commonly used for AC-supply systems and may also be used
on 48V 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.

The following test results indicate the maximal wire length for a magnetic (fast) tripping. The wire length is always two times the
distance to the load (+ and – wire).

May 2020 / Rev. 1.1 DS-CP20.481-EN All parameters are specified at 230Vac, 50Hz input voltage, 48V, 10A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.

CP20.481

CP-Series

48V, 10A, SINGLE PHASE INPUT

24/28

23.3. CHARGING OF BATTERIES

End-of-charge voltage

55.6V

55.0V

54.3V

53.6V

Battery temperature

10°C

20°C

30°C

40°C

Unit A

Input

Output

Unit B

-

+

-

+

Load

+

-

Input

Output

The power supply can be used to charge lead-acid or maintenance free batteries. Four 12V SLA or VRLA batteries are needed in series
connection.

Instructions for charging batteries:

a) Use only matched batteries when putting 12V types in series.
b) Ensure that the ambient temperature of the power supply stays below 40°C.
c) Use a 15A or 16A circuit breaker or a blocking diode between the power supply and the battery.
d) Ensure that the output current of the power supply is below the allowed charging current of the battery.
e) The return current to the power supply is typically 6mA. This return current can discharge the battery when the power supply is

switched off except in case a blocking diode is utilized.

f) Set the device into “Parallel Use” mode and adjust the output voltage, measured at no load and at the battery end of the cable,

very precisely to the end-of-charge voltage.

23.4. SERIES OPERATION

Devices of the same type can be connected in series for higher output voltages. It is
possible to connect as many units in series as needed, providing the sum of the
output voltage does not exceed 150Vdc. Voltages with 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.

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

May 2020 / Rev. 1.1 DS-CP20.481-EN All parameters are specified at 230Vac, 50Hz input voltage, 48V, 10A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.

CP20.481

CP-Series

48V, 10A, SINGLE PHASE INPUT

25/28

23.5. PARALLEL USE TO INCREASE OUTPUT POWER

Unit A

Unit B

-

+

-

+

Load

+

-

Input

Output

Input

Output

Devices can be paralleled to increase the output power. The output voltage of all devices
shall be adjusted to the same value (±100mV) in “Single Use” mode with the same load
conditions on all devices, or the devices can be left with the factory settings. After the

adjustments, set the unit to “Parallel Use” mode, in order to achieve load sharing. 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.
The ambient temperature is not allowed to exceed +60°C.
If more than three devices are connected in parallel, a fuse or circuit breaker with a rating of 15A or 16A is required on each output.

Alternatively, a diode or redundancy module can also be utilized.
Energize all devices 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 devices and avoid installing devices on top of each other. Do not use

devices in parallel in mounting orientations other than the standard mounting orientation or in any other condition where a reduction of
the output current is required (e.g. altitude).

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

May 2020 / Rev. 1.1 DS-CP20.481-EN All parameters are specified at 230Vac, 50Hz input voltage, 48V, 10A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.

CP20.481

CP-Series

48V, 10A, SINGLE PHASE INPUT

26/28

23.6. PARALLEL USE FOR REDUNDANCY

Fig. 23-5 1+1 Redundant configuration for 10A load current

with a dual redundancy module

Fig. 23-6 N+1 Redundant configuration for 30A load current with multiple power supplies and

redundancy modules

L

N

PE

10A

Load

Failure

Monitor

I

YR40.482

Redundancy
Module

Output

Input

1

Input

2

+ +

- -

+

-

opt ional

Power
Supply

DC­OK

+ +

- -

L N PE

Output

Input

o

o

48V,10A

Power
Supply

DC­OK

+ +

- -

L N PE

Output

Input

o

o

48V,10A

I

L

N

PE

30A

Load

Failure

Monitor

I

YR40.482

Redundancy
Module

Output

Input

1

Input

2

+ +

- -

+

-

opt ional

Power
Supply

48V,10A

DC­OK

+ +

- -

L N PE

Output

Input

o

o

Power
Supply

48V,10A

DC­OK

+ +

- -

L N PE

Output

Input

o

o

I

YR40.482

Redundancy
Module

Output

Input

1

Input

2

+ +

- -

+

-

Power
Supply

48V,10A

DC­OK

+ +

- -

L N PE

Output

Input

o

o

Power
Supply

48V,10A

DC­OK

+ +

- -

L N PE

Output

Input

o

o

I I

1+1 Redundancy:

Devices can be paralleled for redundancy to gain higher system availability. Redundant systems require a certain amount of extra power
to support the load in case one device fails. The simplest way is to put two devices in parallel. This is called a 1+1 redundancy. In case
one device fails, the other one is automatically able to support the load current without any interruption. It is essential to use a
redundancy module to decouple devices from each other. This prevents that the defective unit becomes a load for the other device and
the output voltage cannot be maintained any more.

1+1 redundancy allows ambient temperatures up to +70°C.
Pay attention that leakage current, EMI, inrush current, harmonics will increase when using multiple devices.
Recommendations for building redundant power systems:

- Use separate input fuses for each device.

- Use separate mains systems for each device whenever it is possible.

- Monitor the individual devices. Therefore, use the DC-OK signal of the device.

- It is desirable to set the output voltages of all devices to the same value (± 100mV) or leave it at the factory setting.

- Set the devices into “Parallel Use” mode.

N+1 Redundancy:

Redundant systems for a higher power demand are usually built in a N+1 method. E.g. four devices, each rated for 10A are paralleled to
build a 30A redundant system.

Pay attention that leakage current, EMI, inrush current, harmonics will increase when using multiple devices.
Keep an installation clearance of 15mm (left / right) between two devices and avoid installing the devices on top of each other.
Do not use devices in parallel in mounting orientations other than the standard mounting orientation or in any other condition, where a

reduction of the output current is required.
For N+1 redundancy the ambient temperature is not allowed to exceed +60°C.

Wiring examples for 1+1 and n+1 redundancy:

May 2020 / Rev. 1.1 DS-CP20.481-EN All parameters are specified at 230Vac, 50Hz input voltage, 48V, 10A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.

CP20.481

CP-Series

48V, 10A, SINGLE PHASE INPUT

27/28

23.7. OPERATION ON TWO PHASES

Case A

Case B

Enclosure size

180x180x165mm
Rittal Typ IP66 Box
PK 9519 100,
plastic

180x180x165mm

Rittal Typ IP66 Box

PK 9519 100,

plastic

Input voltage

230Vac

230Vac

Load

48V, 8A; (=80%)

48V, 10A; (=100%)

Temperature inside the box

45.7°C

50.6°C

Temperature outside the box

24.6°C

25.6°C

Temperature rise

21.1K

25.0K

240V

+10%

max.

L2

L1

L3

L

N

PE

Power Supply

AC

DC

The power supply can also be used on two-phases of a three-phase-system. Such a
phase-to-phase connection is allowed as long as the supplying voltage is below

+10%

240V
Ensure that the wire, which is connected to the N-terminal, is appropriately fused.
The maximum allowed voltage between a Phase and the PE must be below 300Vac.

.

23.8. USE IN A TIGHTLY SEALED ENCLOSURE

When the device 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 device.

In the following test setup, the device is placed in the middle of the box, no other heat producing items are inside the box. The load is
placed outside the box.

The temperature sensor inside the box is placed in the middle of the right side of the power supply with a distance of 1cm.
The following measurement results can be used as a reference to estimate the temperature rise inside the enclosure.

May 2020 / Rev. 1.1 DS-CP20.481-EN All parameters are specified at 230Vac, 50Hz input voltage, 48V, 10A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.

CP20.481

CP-Series

48V, 10A, SINGLE PHASE INPUT

28/28

23.9. MOUNTING ORIENTATIONS

Fig. 23-7

Mounting
Orientation A

(Standard
orientation)

Power

Supply

OUTPUT

INPUT

Allowed Output Current at 48V

0

+45 +70°C

7.5A

10A

12A

Ambient Temperature

+60

Fig. 23-8
Mounting
Orientation B
(Upside down)

Power

Supply

OUTPUT

INPUT

Allowed Output Current at 48V

0

+30 +70°C

7.5A

12A

Ambient Temperature

+60

Fig. 23-9
Mounting
Orientation C

(Table-top
mounting)

Allowed Output Current at 48V

0

+25 +70°C

6.5A

12A

Ambient Temperature

+60

Fig. 23-10
Mounting
Orientation D
(Horizontal cw)

Power

Supply

OUTPUT

INPUT

Allowed Output Current at 48V

0

+25 +70°C

6.5A

12A

Ambient Temperature

+60

Fig. 23-11
Mounting
Orientation E
(Horizontal ccw)

Power

Supply

OUTPUT

INPUT

Allowed Output Current at 48V

0

+25 +70°C

6.5A

12A

Ambient Temperature

+60

Mounting orientations other than input terminals on the bottom and output on the top require a reduction in continuous output power
or a limitation in the maximum allowed ambient temperature.

The listed lifetime and MTBF values from this datasheet apply only for the standard mounting orientation.
The following curves give an indication for allowed output currents for altitudes up to 2000m (6560ft).

May 2020 / Rev. 1.1 DS-CP20.481-EN All parameters are specified at 230Vac, 50Hz input voltage, 48V, 10A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.