CP5.481, CP5.481-S1-C1

48V, 2.5A, 120W, SINGLE PHASE INPUT

CP-Series

POWER SUPPLY

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AC 100-240V Wide-range Input
Width only 32mm
Efficiency up to 93.5%
Excellent partial load efficiency
20% Output power reserves (PowerBoost)
Easy fuse breaking – 3 times nominal current for 12ms
Safe HiccupPLUS overload mode
Active power factor correction (PFC)
Minimal inrush current surge
Full power between -25°C and +60°C
DC-OK relay contact
3 Year warranty

PRODUCT DESCRIPTIONSHORT-FORM DATA

CP5.481 and CP5.481-S1-C1 provide a DC-input range up to
150Vdc. In addition to the convincing characteristics of theCP5.481, the CP5.481-S1-C1 comes with quick-connect
spring-clamp terminals preferred for applications which areexposed to mechanical vibration, plus its PCBs areconformally coated for increased protection.

Power Boost

The CP-Series are cost optimized power supplies withoutcompromising quality, reliability and performance. The CPSeries is part of the PULS DIMENSION power supply family.

The most outstanding features of these units are the small
size, the high efficiency, the electronic inrush current
limitation, active PFC and the wide operationaltemperature range. The devices also offer PowerBoost:Power reserves of 20%, which may even be used
continuously at temperatures up to +45°C. Additionally,
they can deliver 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 signal contact for
remote monitoring, and a large international approval
package for a variety of applications makes this unit
suitable for nearly every situation.

ORDER NUMBERS

Power Supply CP5.481
Screw terminals
CP5.481-S1-C1 Spring-clamp terminals,
conformal coating
Accessory

ZM10.WALL Wall/Panel mount bracket

Output voltage
Adjustment range
Output current

Input voltage AC
Mains frequency
Input current AC
Power factor
Input voltage DC
Input current DC
AC Inrush current
Efficiency
LossesHold-up time
Temperature range
Size (wxhxd)
WeightDC 48V
Nominal48 - 56V
Factory setting 48.0V
2.5 – 2.1A
Up to +60°C ambient
1.9 – 1.6A
At +70°C ambient
Derate linearly between +60°C and +70°C
3.0A
Up to +45°C ambient
Linear decrease to nominal power
between +45°C and +60°C
AC 100-240V-15%/+10%
50 – 60Hz±6%
1.09 / 0.61A
At 120 / 230Vac
0.98 / 0.91
At 120 / 230Vac
DC 110-150V ±20%1.21 / 0.43A
At 110 / 300Vdc
5 / 6Apeak
At 120 / 230Vac
92.6 / 93.5%
At 120 / 230Vac
9.6 / 8.4W
At 120 / 230Vac
35 / 35ms
At 120 / 230Vac-25°C to +70°C
32x124x102mm
Without DIN rail
440g

MAIN APPROVALS

For details or a complete approval list see chapter 19.

UL 61010-2-201

ATEX

IECEx

Class I Div 2

Jun. 2023 / Rev. 1.5 DS-CP5.481-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 48V, 2.5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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CP5.481, CP5.481-S1-C1

48V, 2.5A, 120W, SINGLE PHASE INPUT

CP-Series

INDEX
Page

1. Intended Use ........................................................... 3
2. Installation Instructions .......................................... 3
3. AC-Input .................................................................. 5
4. DC-Input .................................................................. 6
5. Input Inrush Current ............................................... 7
6. Output ..................................................................... 8
7. Hold-up Time......................................................... 10
8. DC-OK Relay Contact ............................................ 10
9. Efficiency and Power Losses.................................. 11
10. Functional Diagram............................................... 12
11. Front Side and User Elements ............................... 12
12. Connection Terminals ........................................... 13
13. Lifetime Expectancy .............................................. 14
14. MTBF ...................................................................... 14
15. EMC ....................................................................... 15
16. Environment .......................................................... 16
17. Safety and Protection Features ............................ 17
18. Dielectric Strength ................................................ 18Page

19. Approved, Fulfilled or Tested Standards ............. 19
20. Regulatory Product Compliance........................... 20
21. Physical Dimensions and Weight.......................... 21
22. Accessories ............................................................ 2222.1. ZM10.WALL - Wall/Panel Mount Bracket ....2222.2. YR2.DIODE - Redundancy Module ...............23
22.3. UF20.481 Buffer Module ..............................23
23. Application Notes ................................................. 24
23.1. Peak Current Capability ...............................24
23.2. Charging of Batteries ...................................25
23.3. Series Operation ...........................................25
23.4. Parallel Use to Increase Output Power ........25
23.5. Parallel Use for Redundancy ........................26
23.6. Operation on Two Phases ............................27
23.7. Use in a Tightly Sealed Enclosure ................27
23.8. Mounting Orientations ................................28

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

Packaging and packaging aids can and should always be recycled. The product itself may not be disposed of as
domestic refuse.

TERMINOLOGY AND ABREVIATIONSPE andsymbolEarth, Groundt.b.d.

AC 230V
230Vac50Hz vs. 60Hz

PE is the abbreviation for Protective Earth and has the same meaning as the symbolThis document uses the term “earth” which is the same as the U.S. term “ground”.

To be defined, value or description will follow later.

A figure displayed with the AC or DC before the value represents a nominal voltage withstandard tolerances (usually ±15%) included.
E.g.: DC 12V describes a 12V battery disregarding whether it is full (13.7V) or flat (10V)

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

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.

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

shall

.

A key word indicating a mandatory requirement.

Jun. 2023 / Rev. 1.5 DS-CP5.481-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 48V, 2.5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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CP-Series

CP5.481, CP5.481-S1-C1

48V, 2.5A, 120W, SINGLE PHASE INPUT

1. INTENDED USEThis device is designed for installation in an enclosure and is intended for commercial use, such as in industrial control,
process control, monitoring, measurement, Audio/Video, information or communication equipment or the like.

Do not use this device in equipment, where malfunctioning may cause severe personal injury or threaten human life
without additional appropriate safety devices, that are suited for the end-application.

If this device is used in a manner outside of its specification, the protection provided by the device may be impaired.

2. INSTALLATION INSTRUCTIONSWARNING

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

- Turn power off before working on the device and protect against inadvertent re-powering.
- Do not open, modify or repair the device.
- Use caution to prevent any foreign objects from entering into the housing.
- Do not use in wet locations or in areas where moisture or condensation can be expected.
- Do not touch during power-on, and immediately after power-off. Hot surface may cause burns.
Obey the following installation instructions:This device may only be installed and put into operation by qualified personnel.

This device does not contain serviceable parts. The tripping of an internal fuse is caused by an internal defect.

If damage or malfunction should occur during installation or operation, immediately turn power off and send unit to
the factory for inspection.
Install device in an enclosure providing protection against electrical, mechanical and fire hazards.

Install the device onto a DIN rail according to EN 60715 with the input terminals on the bottom and the output
terminals on the top 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 aredesigned for a minimum operating temperature of 60°C for ambient temperatures up to +45°C, 75°C for ambient
temperatures up to +60°C and 90°C for ambient temperatures up to +70°C.

Ensure that all strands of a stranded wire enter the terminal connection. Use ferrules for wires on the input terminals.
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 housing does not provide protection against
spilled liquids.
The isolation of the device is designed to withstand impulse voltages of overvoltage category III according to IEC
60664-1.

The device is designed as “Class of Protection I” equipment according to IEC 61140. Do not use without a proper PE(Protective Earth) connection.

The device is suitable to be supplied from TN, TT or IT mains networks. The continuous voltage between the input
terminal and the PE potential must not exceed 300Vac.
The input can also be powered from batteries or similar DC sources. The continuous voltage between the supply
voltage and the PE/ground potential must not exceed 360Vdc.
A disconnecting means shall be provided for the input of the device.

The device is designed for convection cooling and does not require an external fan. Do not obstruct airflow and do notcover ventilation grid!
The device is designed for altitudes up to 5000m. Above 2000m a reduction in output current and over voltage
category is required.

Jun. 2023 / Rev. 1.5 DS-CP5.481-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 48V, 2.5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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CP-Series

CP5.481, CP5.481-S1-C1

48V, 2.5A, 120W, SINGLE PHASE INPUT

Keep the following minimum installation clearances: 40mm on top, 20mm on the bottom, 5mm left and right side.
Increase the 5mm to 15mm in case the adjacent device is a heat source. When the device is permanently loaded withless than 50%, the 5mm can be reduced to zero.

The device is designed, tested and approved for branch circuits up to 32A (IEC) and 30A (UL) without additional
protection device. If an external fuse is utilized, do not use circuit breakers smaller than 6A B- or C-Characteristic toavoid a nuisance tripping of the circuit breaker.

The maximum surrounding air temperature is +70°C. The operational temperature is the same as the ambient or
surrounding air temperature and is defined 2cm below the device.
The device is designed to operate in areas between 5% and 95% relative humidity.
(only CP5.481)

Installation Instructions for Hazardous Location Areas

The device is suitable for use in Class I Division 2 Groups A, B, C, D locations and for use in Group II Category 3 (Zone 2)
environments.
Classification: ATEX: EPS 19 ATEX 1 201 X, II 3G Ex ec nC IIC T4 Gc / IECEx EPS 19.0078X

WARNING EXPLOSION HAZARDS!

Installation in standard mounting orientation with the input terminals on the bottom of the unit. For non-standard
mounting orientations a reduction of output current is required.
Do not disconnect the device or operate the voltage adjustment unless power has been switched off or the area isknown to be non-hazardous.

A suitable enclosure must be provided for the end product which has a minimum protection of IP54 and fulfils therequirements of the EN 60079-0.

Jun. 2023 / Rev. 1.5 DS-CP5.481-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 48V, 2.5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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CP5.481, CP5.481-S1-C1

48V, 2.5A, 120W, SINGLE PHASE INPUT

CP-Series

3. AC-INPUT

The device is suitable to be supplied from TN, TT or IT mains networks with AC voltage. For suitable DC supply voltages
see chapter 4.
nom.

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

AC 100-240V
85-264Vac
264-300Vac
Occasionally for maximal 500ms
max.
300VacContinuous, according to IEC 60664-1
nom.
50–60Hz
±6%
typ.
80Vac
Steady-state value, see Fig. 3-1
typ.
74Vac
Steady-state value, see Fig. 3-1
See recommendations in chapter 2.

Input current
Power factor
Crest factor

typ.
typ.
typ.

AC 100V
1.31A
0.99
1.7

AC 120V
1.09A
0.98
1.8

AC 230V
0.61A
0.91
2.2

Start-up delay
Rise time

typ.
typ.

420ms
110ms

370ms
110ms

385ms
115ms

typ.

160ms

160ms

160ms

max.

600mV

600mV

600mV

Turn-on overshootFig. 3-1 Input voltage range

Rated
input range

Fig. 3-2 Turn-on behavior, definitions

Input
Voltage

max.
500ms

Turn-onShut-down

POUT

OutputVoltage

VIN
264V 300Vac

85V

Fig. 3-3 Input current vs. output current at
24V output voltage
Input Current, typ.

1.5A

1.25
1.0

0.75

a) 100Vacb) 120Vacc) 230Vac

0.25

00.25 0.5

1.5

2.0

2.5

Start-up
delay

Rise
Time

Power Factor, typ.
(a)

1.0

(b)

0.95

Output Current

1.0

- 5%

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

(c)

0.5

At 48V, 2.5A, see Fig. 3-3
At 48V, 2.5A, see Fig. 3-4
At 48V, 2.5A, The crest factor is themathematical ratio of the peakvalue to RMS value of the input
current waveform.
See Fig. 3-2
At 48V, 2.5A const. current load,
0mF load capacitance, see Fig. 3-2
At 48V, 2.5A const. current load,
2.5mF load capacitance, see Fig. 3-2
See Fig. 3-2

OvershootAC input
AC input range

3A

0.9

(a)
(b)

0.85

0.75
0.5

(a) 100Vac,(b) 120Vac,(c) 230Vac
Output Current

(c)

0.8
1.0

1.5

2.0

2.5

3A

Jun. 2023 / Rev. 1.5 DS-CP5.481-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 48V, 2.5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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CP5.481, CP5.481-S1-C1

48V, 2.5A, 120W, SINGLE PHASE INPUT

CP-Series

4. DC-INPUT

The device is suitable to be supplied from a DC input voltage. Use a battery or a similar DC source. A supply from theintermediate DC-bus of a frequency converter is not recommended and can cause a malfunction or damage the unit.

Connect +pole to L, –pole to N and the PE terminal to an earth wire or to the machine ground.
DC input
DC input range
DC input current

nom.

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

±20%

typ.
typ.
max.

DC 110-150V
88-180Vdc
1.21A
0.43A
360Vdc

typ.
typ.

74Vdc
67Vdc

Steady state value
Steady state value

At 110Vdc, at 48V, 2.5A
At 300Vdc, at 48V, 2.5A
Continuous, according to IEC 60664-1

Fig. 4-1 Wiring for DC Input

Battery+

Power Supply
AC

L

N
PE
-

+
-

Load

DC

Jun. 2023 / Rev. 1.5 DS-CP5.481-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 48V, 2.5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

6/28

CP5.481, CP5.481-S1-C1

48V, 2.5A, 120W, SINGLE PHASE INPUT

CP-Series

5. INPUT INRUSH CURRENT

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

Inrush current
Inrush energy

max.
typ.
typ.
max.

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

AC 100V
8Apeak
4Apeak5Apeak
0.4A²sAC 120V
7Apeak
4Apeak5Apeak
0.5A²s

AC 230V
7Apeak
4Apeak
6Apeak
1A²s

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

Jun. 2023 / Rev. 1.5 DS-CP5.481-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 48V, 2.5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

7/28

CP5.481, CP5.481-S1-C1

48V, 2.5A, 120W, SINGLE PHASE INPUT

CP-Series

6. OUTPUT

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

The output is designed to supply any kind of loads, including capacitive and inductive loads. If extreme large
capacitors, such as EDLCs (electric double layer capacitors or “UltraCaps”) with a capacitance > 0.1F are connected tothe output, the unit might charge the capacitor in an intermittent mode.

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

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

PowerBoost1)

Fuse breaking current

Overload behaviour
Overload/ short-circuit current

Output capacitanceBack-feeding loads

nom.
max.

48V
48-56V
58.0V

max.

63V

Guaranteed value
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.
typ.
48.0V
±0.2%, at full load and cold unit
max.
10mV
Between 85 and 300Vac
max.
50mV
Between 0A and 3A, static value, see Fig. 6-1
max.
50mVppLoad >0.1A, Bandwidth 20Hz to 20MHz, 50Ohm
max.
300mVpp
Load <0.1A, Bandwidth 20Hz to 20MHz, 50Ohm
nom.
2.5A
At 48V and up to +60°C ambient temperature
nom.
1.9A
At 48V and +70°C ambient temperature,
nom.
2.1A
At 56V and up to +60°C ambient temperature
nom.
1.6A
At 56V and +70°C ambient temperature,
Derate linearly between +60°C and +70°C, see chapter 16
Nom.
3A
At 48V and up to +45°C ambient temperature
Nom.
2.6A
At 56V and up to +45°C ambient temperature °C
PowerBoost decreases linearly to nominal power between +45°C and +60°C, see chapter 16
Up to 12ms once every five seconds, see Fig. 6-2.
typ.
7.5A
The fuse braking current is an enhanced transientcurrent which helps to trip fuses on faulty output
branches. The output voltage stays above 40V.
Continuous current
For output voltage above 26Vdc, see Fig. 6-1
Intermittent current2)
For output voltage below 26Vdc, see Fig. 6-1
max.
3.4A
Continuous current, see Fig. 6-1
typ.
5AIntermitted current peak value for typ. 1s
Load impedance 50mOhm, see Fig. 6-3
Discharge current of output capacitors is not included.
Intermitted current average value (R.M.S.)
max.
1.5A
Load impedance 50mOhm, see Fig. 6-3
typ.
750µF
Included inside the power supply

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

1) PowerBoost: This power/ current is continuously allowed up to an ambient temperature of +45°C.
Above +45°C, do not use this power or current longer than a duty cycle of 10% and/ or not longer than 1 minute every 10 minutes.
2) At heavy overloads, the power supply delivers continuous output current for 1s. After this, the output is switched off for approx. 9s before a
new start attempt is automatically performed. This cycle is repeated as long as the overload exists. If the overload has been cleared, thedevice will operate normally. See Fig. 6-3.

Jun. 2023 / Rev. 1.5 DS-CP5.481-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 48V, 2.5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

8/28

CP5.481, CP5.481-S1-C1

48V, 2.5A, 120W, SINGLE PHASE INPUT

CP-Series

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

Output Voltage

Fig. 6-2 Dynamic output current capability,
typ.

Adjustment
Range

56V

48

Output Voltage (dynamic behavior, < 12ms)

56V

48

A

40
32
24
16

8
0

Adjustment
Range

40
32

A: continuous current
B: intermittent current

24
16

B

8
0

Output Current

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5A

Output Current

0

1

2

3

4

5

6

7

8

9 10A

Fig. 6-3 Short-circuit on output, HiccupPLUS mode, typ.
OutputCurrent

Normaloperation

Normaloperation

Short -circuit

5A

0

t
1s

9s

1s

9s

1s

9s

Jun. 2023 / Rev. 1.5 DS-CP5.481-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 48V, 2.5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

9/28

CP5.481, CP5.481-S1-C1

48V, 2.5A, 120W, SINGLE PHASE INPUT

CP-Series

7. HOLD-UP TIME

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

Hold-up TimeAC 100V
70ms
55ms
35ms
27ms

typ.
min.
typ.
min.

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

Hold-up Time

90ms
75

a

At 48V, 5A, see Fig. 7-1
At 48V, 5A, see Fig. 7-1
At 48V, 2.5A, see Fig. 7-1
At 48V, 2.5A, see Fig. 7-1

Input
VoltageZero Transition

b

45

c
d

30
15

0

AC 230V
70ms
55ms
35ms
27ms

Fig. 7-2 Shut-down behavior, definitionsa) 48V 1.25A typ. c) 48V 2.5A typ.
b) 48V 1.25A min. d) 48V 2.5A min.

60

AC 120V
70ms
55ms
35ms
27ms

Input Voltage

120

90

155

OutputVoltage- 5%
Hold-up Time

230Vac190

8. DC-OK RELAY CONTACT

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

As soon as the output voltage reaches typ. 90% of the adjusted output voltage level.
As soon as the output voltage dips more than 10% below the adjusted output voltage.
Short dips will be extended to a signal length of 100ms. Dips shorter than 1ms will be ignored.
Typically 2V
Maximal 60Vdc 0.3A, 30Vdc 1A, 30Vac 0.5A, resistive load
Minimal permissible load: 1mA at 5Vdc
See dielectric strength table in chapter 18.

Switching hysteresis
Contact ratings
Isolation voltage

Fig. 8-1 DC-OK relay contact behavior

VOUT = VADJ
10%
<
1ms

open

>
1...4ms

closed0.9* VADJ
100ms

open

closedJun. 2023 / Rev. 1.5 DS-CP5.481-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 48V, 2.5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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CP5.481, CP5.481-S1-C1

48V, 2.5A, 120W, SINGLE PHASE INPUT

CP-Series

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

*)

typ.
typ.
typ.

AC 100V
92.1%
92.0%
90.8%

AC 120V
92.6%
92.5%
91.1%

AC 230V
93.5%
93.6%
91.6%

typ.
typ.
typ.
typ.

1.5W
5.8W
10.3W
12.5W

1.5W
5.6W
9.6W
11.7W

1.6W
5.5W
8.4W
9.8W

At 48V, 2.5A
At 48V, 3A (PowerBoost)
25% at 0.63A, 25% at 1.25A,
25% at 1.88A, 25% at 2.5A
At 48V, 0A
At 48V, 1.25A
At 48V, 2.5A
At 48V, 3A (PowerBoost)

The average efficiency is an assumption for a typical application where the power supply is loaded with 25% of the nominal load for 25%of the time, 50% of the nominal load for another 25% of the time, 75% of the nominal load for another 25% of the time and with 100%of the nominal load for the rest of the time.
Fig. 9-1 Efficiency vs. output current at 48V,
typ.

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

Efficiency

95%
94
93
92
91
90
89
88
87
0.5

Power Losses

12W

(c)

(b)
(a)

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

1.5

2

10
8
6
4

Output Current

1

(a)
(b)
(c)

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

2.5

3A

2
0

Output Current

0

0.5

1

1.5

2

2.5

3A

Fig. 9-3 Efficiency vs. input voltage at 48V,
2.5A, typ.

Fig. 9-4 Losses vs. input voltage at 48V, 2.5A,
typ.

Efficiency

Power Losses

94%

11W

93

10

92

9

91

8

90

7

89

88

6

Input Voltage

100 120180

230

264Vac5Input Voltage

100 120180

230

264VacJun. 2023 / Rev. 1.5 DS-CP5.481-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 48V, 2.5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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10. FUNCTIONAL DIAGRAM
Fig. 10-1 Functional diagram

L
N

Input Fuse
Input Filter
Input Rectifier
Inrush Current Limiter

Temperature
Shutdown

OutputPower
Manager

PFC
Converter

OutputOverVoltage
Protection

Power
Converter

OutputVoltage
Monitor

OutputFilter++-OutputVoltage
Regulator

VOUT

DC-ok
Relay

DC-ok
LED

DC-ok
Contact

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

Fig. 11-2 Front side

CP5.481

CP5.481-S1-C1

AInput Terminals
N, L Line input

PE (Protective
Earth) input

B

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

Output Voltage Potentiometer

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 DCOK LED. See chapter 8 for details.

Jun. 2023 / Rev. 1.5 DS-CP5.481-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 48V, 2.5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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48V, 2.5A, 120W, SINGLE PHASE INPUT

CP-Series

12. TERMINALS AND WIRING

The terminals are IP20 Finger safe constructed and suitable for field- and factory wiring.
CP5.481
Type
Solid wire
Stranded wire
American Wire Gauge
Max. wire diameter (including ferrules)
Recommended tightening torque
Wire stripping length
Screwdriver

Input
Screw terminal
Max. 6mm2Max. 4mm2
AWG 20-10
2.8mm
Max. 1Nm
7mm
3.5mm slotted or crosshead No 2

OutputScrew terminal
Max. 6mm2Max. 4mm2
AWG 20-10
2.8mm
Max. 1Nm
7mm
3.5mm slotted or crosshead No 2

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

CP5.481-S1-C1
Type
Solid wire
Stranded wire
American Wire Gauge
Max. wire diameter (including ferrules)
Wire stripping length

Input
Spring-clamp terminal
Max. 6mm2Max. 4mm2
AWG 20-10
2.8mm
10mm

OutputSpring-clamp terminal
Max. 6mm2Max. 4mm2
AWG 20-10
2.8mm
10mm

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

Screwdriver

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 asshown in Fig. 12-2.
Fig. 12-1 Daisy chaining of outputs

Power
SupplyPower
Supply

+ + -

+ + -

Output-Output-Fig. 12-2 Using distribution terminals

Load
+

-

Power
SupplyPower
Supply

+ + -

+ + -

-

Output-OutputDistribution
Terminals
Load
+

-

Maximal 15A continuous for CP5.241-S2
Maximal 25A continuous for all other units

Jun. 2023 / Rev. 1.5 DS-CP5.481-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 48V, 2.5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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48V, 2.5A, 120W, SINGLE PHASE INPUT

CP-Series

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

Lifetime expectancy

AC 100V
161 000h
456 000h
57 000h
161 000h
35 000h
100 000h

AC 120V
163 000h
462 000h
62 000h
176 000h
41 000h
115 000h

AC 230V
166 000h
469 000h
71 000h
201 000h
49 000h
139 000h

At 48V, 1.25A and 40°C
At 48V, 1.25A and 25°C
At 48V, 2.5A and 40°C
At 48V, 2.5A and 25°C
At 48V, 3A and 40°C
At 48V, 3A and 25°C

14. MTBF

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

MTBF SN 29500, IEC 61709
MTBF MIL HDBK 217F

AC 100V
772 000h
1 353 000h
327 000h

AC 120V
778 000h
1 364 000h
331 000h

AC 230V
836 000h
1 457 000h
355 000h

473 000h

478 000h

510 000h

78 000h80 000h86 000h

105 000h

107 000h

115 000h

At 48V, 2.5A and 40°C
At 48V, 2.5A and 25°C
At 48V, 2.5A and 40°C;
Ground Benign GB40
At 48V, 2.5A and 25°C;
Ground Benign GB25
At 48V, 2.5A and 40°C;
Ground Fixed GF40
At 48V, 2.5A and 25°C;
Ground Fixed GF25

Jun. 2023 / Rev. 1.5 DS-CP5.481-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 48V, 2.5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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15. EMCThe EMC behavior of the device is designed for applications in industrial environment as well as in residential,commercial and light industry environments.

The device is investigated according to EN 61000-6-1, EN 61000-6-2, EN 61000-6-3 and EN 61000-6-4.
EMC Immunity
Electrostatic discharge

EN 61000-4-2

Electromagnetic RF field
Fast transients (Burst)

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

Surge voltage on input

EN 61000-4-5

Surge voltage on output

EN 61000-4-5

Surge voltage on DC-OK
Conducted disturbance
Mains voltage dips

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

Voltage interruptions
Powerful transients

EN 61000-4-11
VDE 0160

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

8kV
15kV
20V/m
4kV
2kV
2kV
2kV
4kV
1kV
2kV
1kV
20V
0Vac, 20ms
40Vac, 200ms
70Vac, 500ms
0Vac, 20ms
80Vac, 200ms, <2A
80Vac, 200ms, >2A
140Vac, 500ms
5000ms
750V, 0.3ms

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

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

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

EN 55011, EN 55032, FCC Part 15, CISPR 11, CISPR 32

Class B

IEC/CISPR 16-1-2, IEC/CISPR 16-2-1

Limits for local DC power
networks fulfilled
Class B
Fulfilled for Class A equipment
Fulfilled, tested with constantcurrent loads, no pulsing

EN 55011, EN 55032
EN 61000-3-2
EN 61000-3-3This device complies with FCC Part 15 rules.
Operation is subjected to following two conditions: (1) this device may not cause harmful interference, and (2) thisdevice must accept any interference received, including interference that may cause undesired operation.
Switching Frequencies
PFC converter
Main converter
Auxiliary converter
DC-OK relay converter

30kHz to 140kHz
60kHz to 140kHz
30kHz to 60kHz
18kHz to 25kHz

Input voltage and output load dependent
Output load dependent
Output load dependent
Output voltage dependent

Jun. 2023 / Rev. 1.5 DS-CP5.481-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 48V, 2.5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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48V, 2.5A, 120W, SINGLE PHASE INPUT

CP-Series

16. ENVIRONMENT
Operational temperature is the same as the ambientor surrounding temperature and is defined as the airtemperature 2cm below the unit.
-40°C to +85°C
For storage and transportation
3W/K
Between +60°C and +70°C
0.167A/1000m or 5K/1000m
For altitudes >2000m, see Fig. 16-2
The derating is not hardware controlled. The user has to take this into consideration tostay below the derated current limits in order not to overload the unit.
5 to 95% r.h.
According to IEC 60068-2-30
110-54kPa
See Fig. 16-2 for details
Up to 5000m
See Fig. 16-2 for details
III
According to IEC 60664-1 for altitudes up to 2000m
II
According to IEC 60664-1, for altitudes above 2000m
2
According to IEC 62368-1, not conductive
2-17.8Hz: ±1.6mm;
According to IEC 60068-2-6
17.8-500Hz: 2g
2 hours / axis
30g 6ms, 20g 11ms
According to IEC 60068-2-27
3 bumps per direction, 18
bumps in total
Shock and vibration is tested in combination with DIN rails according to EN 60715 with aheight of 15mm and a thickness of 1.3mm and standard orientation.
Some audible noise may be emitted from the power supply during no load, overload or
short circuit.

Operational temperature-25°C to +70°C

Storage temperature
Output derating

Humidity
Atmospheric pressure
AltitudeOver-voltage category
Degree of pollution
Vibration sinusoidal
Shock

Audible noise

Fig. 16-1 Output current vs. ambient temp.
(Inom 2.5A; Iout with PowerBoost = 3A)

Fig. 16-2 Output current vs. altitude

Allowed Output Current at 48V

Allowed Output Current at 48V

3A

B

2.5A

A

1.9A

3A

2.5A

A

2A

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

A... 85 to 264Vac, continuous
B... short term

0
-25

0

C
B

45

60 70°C

Ambient Temperature

Altitude 0mAP*) 110kPa*) Atmospheric pressure

2000m
80kPa

5000m
54kPa

Jun. 2023 / Rev. 1.5 DS-CP5.481-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 48V, 2.5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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48V, 2.5A, 120W, SINGLE PHASE INPUT

CP-Series

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

min.

500MOhmmin.

500MOhmmin.

500MOhmmin.

500MOhm

PE resistancemax.

0.1OhmOutput over-voltage protection

typ.
max.

58.5Vdc
60Vdc
In case of an internal defect, a redundant circuit limits the maximum output
voltage. The output shuts down and performs three restart attempts. If the
failure continues, the output shuts down. Cycle input power to reset.
I
According to IEC 61140
A PE (Protective Earth) connection is required
IP 20
According to EN/IEC 60529
Output shut-down with automatic restart.
Included
Temperature sensors are installed on criticalcomponents inside the unit and turn the unit off insafety critical situations, which can happen e.g. when
ambient temperature is too high, ventilation is
obstructed or the derating requirements are notfollowed. There is no correlation between theoperating temperature and turn-off temperaturesince this is dependent on input voltage, load andinstallation methods.
MOV (Metal Oxide
For protection values see chapter 15 (EMC).
Varistor)
Not user replaceable slow-blow high-braking
Includedcapacity fuse
0.10mA / 0.27mA
At 100Vac, 50Hz, TN-,TT-mains / IT-mains
0.13mA / 0.38mA
At 120Vac, 60Hz, TN-,TT-mains / IT-mains
0.20mA / 0.60mA
At 230Vac, 50Hz, TN-,TT-mains / IT-mains
0.13mA / 0.35mA
At 110Vac, 50Hz, TN-,TT-mains / IT-mains
0.17mA / 0.51mA
At 132Vac, 60Hz, TN-,TT-mains / IT-mains
0.27mA / 0.81mA
At 264Vac, 50Hz, TN-,TT-mains / IT-mains

Class of protection
Degree of protection
Over-temperature protection

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

typ.
typ.
typ.
max.
max.
max.

Jun. 2023 / Rev. 1.5 DS-CP5.481-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 48V, 2.5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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48V, 2.5A, 120W, SINGLE PHASE INPUT

CP-Series

18. DIELECTRIC STRENGTH

The output voltage is floating and has no ohmic connection to the ground.
The output is insulated to the input by a double or reinforced insulation.

Type and routine tests are conducted by the manufacturer. Field tests may be conducted in the field using theappropriate test equipment which applies the voltage with a slow ramp (2s up and 2s down). Connect all inputterminals together as well as all output poles before conducting the test. When testing, set the cut-off current settings
to the value in the table below.
We recommend that either the + pole or the – pole shall be connected to the protective earth system. This helps to
avoid situations in which a load starts unexpectedly or cannot be switched off when unnoticed earth faults occur.
Fig. 18-1 Dielectric strength

Input
L
N

Earth, PE

B

A

B *)

C

Type test

DC-okRoutine test

D
Output

+

-

60s
5s

Field test
5s
Field test cut-off
current settings

A
2500Vac

B
3000Vac

C
1000Vac

D
500Vac2000Vac> 10mA

2000Vac> 10mA

500Vac> 20mA

500Vac> 1mA

2500Vac

2500Vac

500Vac

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

Jun. 2023 / Rev. 1.5 DS-CP5.481-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 48V, 2.5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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CP-Series

CP5.481, CP5.481-S1-C1

48V, 2.5A, 120W, SINGLE PHASE INPUT

19. APPROVED, FULFILLED OR TESTED STANDARDSIEC 61010-2-201
UL 61010-2-201

IEC 62368

ATEX(only CP5.481)

IECEx(only CP5.481)

Class I Div 2(only CP5.481)

IEC 61558-2-16

VDMA 24364

CB Scheme Certificate
Electrical Equipment for Measurement, Control and Laboratory Use Particular requirements for control equipment

UL Certificate
Listed equipment for category NMTR - Electrical Equipment for
Measurement, Control and Laboratory Use - Particular requirements
for control equipment
Applicable for US and Canada
E-File: E198865
CB Scheme Certificate
IEC 62368-1 Audio/video, information and communication technology
equipment - Safety requirements
Output safety level: ES1
Agency Certificate (Bureau Veritas)
EN 60079-0 Explosive atmospheres - General requirements
EN 60079-7, EN 60079-15 Equipment protection by type of protection"e" and "n"Certificate: EPS 19 ATEX 1 201 X
Temperature Code: T4
Type of Protection: ec nC
IECEx Certificate
IEC 60079-0 Explosive atmospheres - General requirements
IEC 60079-7, IEC 60079-15 Equipment protection by type of protection"e" and "n"Certificate: IECEx EPS 19.0078X
Temperature Code: T4
Type of Protection: ec nC
UL Certificate
Listed equipment for category NRAD - Listed equipment Industrial
Control Equipment for Use in Hazardous Locations
Applicable for US and Canada
E-File: E327416
Temperature Code: T4
Groups: A, B, C and D
Test Certificate
Safety of transformers, reactors, power supply units and similar
products for supply voltages up to 1100 V
Particular requirements and tests for switch mode power supply units
and transformers for switch mode power supply units
Paint Wetting Impairment Substances Test (or LABS-Test)
Tested for Zone 2 and test class C1 according to VDMA 24364-C1-L/W
for solvents and water-based paints

Jun. 2023 / Rev. 1.5 DS-CP5.481-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 48V, 2.5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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48V, 2.5A, 120W, SINGLE PHASE INPUT

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20. REGULATORY PRODUCT COMPLIANCE
EU Declaration ofConformity
REACH Regulation (EU)

WEEE Regulation

CCC

UKCA

The CE mark indicates conformance with the- EMC directive- Low-voltage directive- RoHS directive
Manufacturer's Declaration
EU regulation regarding the Registration, Evaluation,
Authorisation and Restriction of Chemicals (REACH) fulfilled.
EU Regulation (EC) 1907/2006.
Manufacturer's Declaration
EU Regulation on Waste Electrical and Electronic Equipment
Registered as business to business (B2B) products.
EU Regulation 2012/19/EU
CCC Certificate
China Compulsory Certification (CNCA-C23-01:2019)
Certificate for devices made in Suzhou/China (PULSElectronics): 2021122303114443
Certificate for devices made in Chomutov/Czech Republic(PULS investiční): 2021122303114444
CCC-ExUKCA Declaration of Conformity
Trade conformity assessment for England, Scotland and WalesThe UKCA mark indicates conformity with the UK Statutory
Instruments
2016 No.1091,
2016 No.1107,
2012 No.3032

Jun. 2023 / Rev. 1.5 DS-CP5.481-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 48V, 2.5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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CP5.481, CP5.481-S1-C1

48V, 2.5A, 120W, SINGLE PHASE INPUT

21. PHYSICAL DIMENSIONS AND WEIGHT
Width
HeightDepth
WeightDIN rail
Housing material
Installation clearances
Penetration protection
Fig. 21-1
Front view
CP5.481

32mm
124mm
102mm
The DIN rail depth must be added to the unit depth to calculate the total required
installation depth.
440g
Use 35mm DIN rails according to EN 60715 or EN 50022 with a height of 7.5 or 15mm.
Body: Aluminium alloy
Cover: Zinc-plated steel
See chapter 2
Small parts like screws, nuts, etc. with a diameter larger than 3.5mm
Fig. 21-2
Front view
CP5.481-S1-C1

All dimensions in mm

Fig. 21-3
Side viewAll dimensions in mm

Jun. 2023 / Rev. 1.5 DS-CP5.481-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 48V, 2.5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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CP-Series

CP5.481, CP5.481-S1-C1

48V, 2.5A, 120W, SINGLE PHASE INPUT

22. ACCESSORIES
22.1. ZM10.WALL - WALL/PANEL MOUNT BRACKETThis bracket is used to mount the devices on a wall/panel without utilizing a DIN rail. The bracket can be mounted
without detaching the DIN rail brackets.
Fig. 22-1 Isometric viewFig. 22-2 Isometric viewFig. 22-3 Isometric viewFig. 22-4 Wall/panel mounting, frontview

Fig. 22-5 Hole pattern for wall
mounting

Fig. 22-6 Wall/panel mounting,side viewJun. 2023 / Rev. 1.5 DS-CP5.481-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 48V, 2.5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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CP5.481, CP5.481-S1-C1

48V, 2.5A, 120W, SINGLE PHASE INPUT

22.2. YR2.DIODE - REDUNDANCY MODULEThe YR2.DIODE is a dual redundancy module, which can be used to build 1+1 or N+1 redundant
systems.

The device is equipped with two 10A nominal input channels, which are individually decoupled byutilizing diode technology. The output can be loaded with a nominal 20A continuous current.

The device does not require an additional auxiliary voltage and is self-powered even in case of a shortcircuit across the output.

For a safe and vibration resistant wiring, the device is equipped with time saving quick connect springclamp terminals.
The unit is very narrow and only requires 32mm width on the DIN rail.

See chapter 23.5 for wiring information.

22.3. UF20.481 BUFFER MODULEThe 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.

Jun. 2023 / Rev. 1.5 DS-CP5.481-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 48V, 2.5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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48V, 2.5A, 120W, SINGLE PHASE INPUT

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23. APPLICATION NOTES
23.1. PEAK CURRENT CAPABILITY

The unit can deliver peak currents (up to several milliseconds) which are higher than the specified short term currents.

This helps to start current demanding loads. Solenoids, contactors and pneumatic modules often have a steady state
coil and a pick-up coil. The inrush current demand of the pick-up coil is several times higher than the steady-state
current and usually exceeds the nominal output current. The same situation applies when starting a capacitive load.

The peak current capability also ensures the safe operation of subsequent circuit breakers of load circuits. The loadbranches are often individually protected with circuit breakers or fuses. In case of a short or an overload in one branch
circuit, the fuse or circuit breaker need a certain amount of 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. 23-1 5A peak current for 50ms , typ.
(2x the nominal current)

Fig. 23-2 12.5A peak current for 5ms , typ.
(5x the nominal current)

Fig. 23-3 7.5A peak current for 12ms , typ.
(3x the nominal current)

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

Peak current voltage dips

Typically from 48V to 32V
Typically from 48V to 41V
Typically from 48V to 34V

At 5A for 50ms and resistive load
At 12.5A for 2ms and resistive load
At 12.5A for 5ms and resistive load

Jun. 2023 / Rev. 1.5 DS-CP5.481-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 48V, 2.5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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CP-Series

CP5.481, CP5.481-S1-C1

48V, 2.5A, 120W, SINGLE PHASE INPUT

23.2. CHARGING OF BATTERIESThe power supply can be used to charge lead-acid or maintenance free batteries. Four 12V SLA or VRLA batteries areneeded in series connection.

Instructions for charging batteries:
a)

b)

c)

d)
e)
f)

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

Ensure that the ambient temperature of the power supply stays below 40°C for mains voltage of AC 120V or
higher and 35°C for a mains voltage of AC 100V.
Use a 6A circuit breaker or a blocking diode between the power supply and the battery.

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

The return current to the power supply is typically 12mA. This return current can discharge the battery when the
power supply is switched off except in case a blocking diode is utilized.
Set the output voltage, measured at no load and at the battery end of the cable, very precisely to the end-ofcharge voltage. The voltage should be set to 55.6V at 10°C, 55.0V at 20°C, 54.3V at 30°C and 53.6V at 40°C
ambient temperature.

23.3. SERIES OPERATION

Unit A

Input

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 isapplied to the output terminals.

Output+-Unit B

Input

Keep an installation clearance of 15mm (left / right) between two power
Outputsupplies 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.

+
-

+

Load

-

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

23.4. PARALLEL USE TO INCREASE OUTPUT POWER

Unit A

Devises can be paralleled to increase the output power. The output voltage
shall be adjusted to the same value (±100mV) with the same load conditions on
all devices, or the devices can be left with the factory settings.
The ambient temperature is not allowed to exceed +40°C.

Input

OutputUnit BInput

If more than three devices are connected in parallel, a fuse or circuit breakerwith a rating of 6A is required on each output. Alternatively, a diode or
redundancy module can also be utilized.

+-

Output

+
-

+

Load

-

Energize all devices at the same time. It also might be necessary to cycle theinput 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 eachother. 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.

Jun. 2023 / Rev. 1.5 DS-CP5.481-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 48V, 2.5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

25/28

CP5.481, CP5.481-S1-C1

48V, 2.5A, 120W, SINGLE PHASE INPUT

CP-Series

23.5. PARALLEL USE FOR REDUNDANCY

Please note that there is a variant with built-in redundancy is available in the CP5 series. Check CP5.481-R3 units.

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.
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
2.5A are paralleled to build a 7.5A 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 ofeach other.

Do not use devices in parallel in mounting orientations other than the standard mounting orientation or in any othercondition, where a reduction of the output current is required.

For N+1 redundancy the ambient temperature is not allowed to exceed +40°C.
Wiring examples:Fig. 23-5
N+1 Redundant configuration for 7.5A load current withmultiple power supplies and redundancy modules

DCOK

o
o

Power
SupplyInput

L N PE

I

L

N

PE

+ - + -

YR2.DIODE
Redundancy
Module

+ + -

-

DCOK

o
o

L N PE

I

DCOK

o
o

Input

Input

+ -

-

Power
SupplyPower
SupplyOutput+ + -Output
48V, 2.5A

Output
48V, 2.5A

Input Input
2
1

L N PE

2.5A
Load
I

+ - + -

YR2.DIODE
Redundancy
Module

+ + -

-

+ + -

-

DCOK

o
o

DCOK

o
o

Output
48V, 2.5A

Input Input
2
1

Power
SupplyOutputOutput
48V, 2.5A

Power
Supply

Input

+ -

Input

L N PEI

L N PEI+ - + -

YR2.DIODE

Redundancy
Module

+ + -

-

DCOK

o
o

FailureMonitor

Output
48V, 2.5A

Input Input
2
1

Power
SupplyOutputInput+ -optional-

Output
48V, 2.5A

optional+ + -FailureMonitoroptional

Fig. 23-4
1+1 Redundant configuration for 2.5A load
current with a dual redundancy module

L N PE

7.5A
Load

I

L

N

PE

Jun. 2023 / Rev. 1.5 DS-CP5.481-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 48V, 2.5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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CP5.481, CP5.481-S1-C1

48V, 2.5A, 120W, SINGLE PHASE INPUT

CP-Series

23.6. OPERATION ON TWO PHASES

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

L1

L3

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

Power Supply

240V +10% max.

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 240V+10%.

AC

L

N

PE

L2

DC

23.7. USE IN A TIGHTLY SEALED ENCLOSURE

When the power supply is installed in a tightly sealed enclosure, the temperature inside the enclosure will be higher
than outside. In such situations, the inside temperature defines the ambient temperature for the power supply.

The following measurement results can be used as a reference to estimate the temperature rise inside the enclosure.

The power supply is placed in the middle of the box, no other heat producing items are inside the box

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

Enclosure size

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

Case A
110x180x165mm
Rittal Typ IP66 Box
PK 9516 100,plastic
230Vac48V, 2A; (=80%)
39.1°C
25.8°C
13.3K

Case B
110x180x165mm
Rittal Typ IP66 Box
PK 9516 100,plastic
230Vac48V, 2.5A; (=100%)
40.5°C
25.4°C
15.1K

Jun. 2023 / Rev. 1.5 DS-CP5.481-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 48V, 2.5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

27/28

CP5.481, CP5.481-S1-C1

48V, 2.5A, 120W, SINGLE PHASE INPUT

CP-Series

23.8. MOUNTING ORIENTATIONSMounting orientations other than input terminals on the bottom and output on the top require a reduction incontinuous 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.
Fig. 23-6
Mounting
Orientation A(Standardorientation)

Allowed Output Current at 48V

3A
2.5A

OUTPUT

1.9A

Power
Supply0

INPUT

Fig. 23-7
Mounting
Orientation B(Upside down)

Allowed Output Current at 48V

INPUT

3A

2A

Power
Supply0+30+60 +70°C

Ambient Temperature

OUTPUT

Allowed Output Current at 48V

3A

1.5A
0

+25

+60 +70°C

Ambient Temperature

Allowed Output Current at 48V

3A

OUTPUT

Power
Supply

INPUT

1.5A
0

+25

+60 +70°C

Ambient Temperature

Allowed Output Current at 48V

INPUT

Power
Supply3A

OUTPUT

Fig. 23-10
Mounting
Orientation E(Horizontal ccw)

+60 +70°C

Ambient Temperature

Fig. 23-8
Mounting
Orientation C(Table-top
mounting)

Fig. 23-9
Mounting
Orientation D(Horizontal cw)

+45

1.5A
0

+25

+60 +70°C

Ambient Temperature

Jun. 2023 / Rev. 1.5 DS-CP5.481-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 48V, 2.5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

28/28