CP5.481, CP5.

481-S1-C1
CP-Series 48V, 2.5A, 120W, SINGLE PHASE INPUT

POWER SUPPLY
 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 DESCRIPTION SHORT-FORM DATA

The CP-Series are cost optimized power supplies without Output voltage DC 48V Nominal
compromising quality, reliability and performance. The CP- Adjustment range 48 - 56V Factory setting 48.0V
Series is part of the PULS DIMENSION power supply family. Output current 2.5 – 2.1A Up to +60°C ambient
CP5.481 and CP5.481-S1-C1 provide a DC-input range up to 1.9 – 1.6A At +70°C ambient
150Vdc. In addition to the convincing characteristics of the Derate linearly between +60°C and +70°C
CP5.481, the CP5.481-S1-C1 comes with quick-connect Power Boost 3.0A Up to +45°C ambient
spring-clamp terminals preferred for applications which are Linear decrease to nominal power
exposed to mechanical vibration, plus its PCBs are between +45°C and +60°C
conformally coated for increased protection. Input voltage AC AC 100-240V -15%/+10%
The most outstanding features of these units are the small Mains frequency 50 – 60Hz ±6%
size, the high efficiency, the electronic inrush current Input current AC 1.09 / 0.61A At 120 / 230Vac
limitation, active PFC and the wide operational Power factor 0.98 / 0.91 At 120 / 230Vac
temperature range. The devices also offer PowerBoost: Input voltage DC DC 110-150V ±20%
Power reserves of 20%, which may even be used Input current DC 1.21 / 0.43A At 110 / 300Vdc
continuously at temperatures up to +45°C. Additionally, AC Inrush current 5 / 6Apeak At 120 / 230Vac
they can deliver 3 times the nominal output current for Efficiency 92.6 / 93.5% At 120 / 230Vac
12ms which helps to trip fuses on faulty output branches. Losses 9.6 / 8.4W At 120 / 230Vac
High immunity to transients and power surges as well as Hold-up time 35 / 35ms At 120 / 230Vac
low electromagnetic emission, a DC-OK signal contact for Temperature range -25°C to +70°C
remote monitoring, and a large international approval Size (wxhxd) 32x124x102mm Without DIN rail
package for a variety of applications makes this unit Weight 440g
suitable for nearly every situation.

ORDER NUMBERS MAIN APPROVALS

For details or a complete approval list see chapter 19.
Power Supply CP5.481 Screw terminals
CP5.481-S1-C1 Spring-clamp terminals,
conformal coating

Accessory ZM10.WALL Wall/Panel mount bracket 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. 1/28
www.pulspower.com Phone +49 89 9278 0 Germany
 CP5.481, CP5.481-S1-C1
CP-Series 48V, 2.5A, 120W, SINGLE PHASE INPUT

INDEX
Page Page
1. Intended Use ........................................................... 3 19. Approved, Fulfilled or Tested Standards ............. 19
2. Installation Instructions .......................................... 3 20. Regulatory Product Compliance........................... 20
3. AC-Input .................................................................. 5 21. Physical Dimensions and Weight.......................... 21
4. DC-Input .................................................................. 6 22. Accessories ............................................................ 22
5. Input Inrush Current ............................................... 7 22.1. ZM10.WALL - Wall/Panel Mount Bracket ....22
6. Output ..................................................................... 8 22.2. YR2.DIODE - Redundancy Module ...............23
7. Hold-up Time......................................................... 10 22.3. UF20.481 Buffer Module ..............................23
8. DC-OK Relay Contact ............................................ 10 23. Application Notes ................................................. 24
9. Efficiency and Power Losses.................................. 11 23.1. Peak Current Capability ...............................24
10. Functional Diagram............................................... 12 23.2. Charging of Batteries ...................................25
11. Front Side and User Elements ............................... 12 23.3. Series Operation ...........................................25
12. Connection Terminals ........................................... 13 23.4. Parallel Use to Increase Output Power ........25
13. Lifetime Expectancy .............................................. 14 23.5. Parallel Use for Redundancy ........................26
14. MTBF ...................................................................... 14 23.6. Operation on Two Phases ............................27
15. EMC ....................................................................... 15 23.7. Use in a Tightly Sealed Enclosure ................27
16. Environment .......................................................... 16 23.8. Mounting Orientations ................................28
17. Safety and Protection Features ............................ 17
18. Dielectric Strength ................................................ 18

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.

TERMINOLOGY AND ABREVIATIONS

PE and symbol PE is the abbreviation for Protective Earth and has the same meaning as the symbol .
Earth, Ground This document uses the term “earth” which is the same as the U.S. term “ground”.
t.b.d. To be defined, value or description will follow later.
AC 230V A figure displayed with the AC or DC before the value represents a nominal voltage with
standard tolerances (usually ±15%) included.
E.g.: DC 12V describes a 12V battery disregarding whether it is full (13.7V) or flat (10V)
230Vac A figure with the unit (Vac) at the end is a momentary figure without any additional
tolerances included.
50Hz vs. 60Hz As long as not otherwise stated, AC 230V parameters are valid at 50Hz mains frequency.
may A key word indicating flexibility of choice with no implied preference.
shall A key word indicating a mandatory requirement.
should A key word indicating flexibility of choice with a strongly preferred implementation.

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. 2/28
www.pulspower.com Phone +49 89 9278 0 Germany
 CP5.481, CP5.481-S1-C1
CP-Series 48V, 2.5A, 120W, SINGLE PHASE INPUT

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, 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 INSTRUCTIONS

WARNING 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 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. 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 not
cover 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. 3/28
www.pulspower.com Phone +49 89 9278 0 Germany
 CP5.481, CP5.481-S1-C1
CP-Series 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 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 6A B- or C-Characteristic to
avoid a nuisance tripping of the circuit breaker.
The maximum surrounding air temperature is +70°C. The operational temperature is the same as the ambient or
surrounding air temperature and is defined 2cm below the device.
The device is designed to operate in areas between 5% and 95% relative humidity.

(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 is
known to be non-hazardous.
A suitable enclosure must be provided for the end product which has a minimum protection of IP54 and fulfils the
requirements of the EN 60079-0.

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. 4/28
www.pulspower.com Phone +49 89 9278 0 Germany
 CP5.481, CP5.481-S1-C1
CP-Series 48V, 2.5A, 120W, SINGLE PHASE INPUT

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.

AC input nom. AC 100-240V

AC input range 85-264Vac
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. 80Vac Steady-state value, see Fig. 3-1
Shut-down voltage typ. 74Vac Steady-state value, see Fig. 3-1
External input protection See recommendations in chapter 2.

AC 100V AC 120V AC 230V

Input current typ. 1.31A 1.09A 0.61A At 48V, 2.5A, see Fig. 3-3
Power factor typ. 0.99 0.98 0.91 At 48V, 2.5A, see Fig. 3-4
Crest factor typ. 1.7 1.8 2.2 At 48V, 2.5A, The crest factor is the
mathematical ratio of the peak
value to RMS value of the input
current waveform.
Start-up delay typ. 420ms 370ms 385ms See Fig. 3-2
Rise time typ. 110ms 110ms 115ms At 48V, 2.5A const. current load,
0mF load capacitance, see Fig. 3-2
typ. 160ms 160ms 160ms At 48V, 2.5A const. current load,
2.5mF load capacitance, see Fig. 3-2
Turn-on overshoot max. 600mV 600mV 600mV See Fig. 3-2

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

Rated Input
POUT input range max.
500ms Voltage
Shut-down

Turn-on

Output - 5%
Overshoot

Voltage
VIN
Start-up Rise
delay Time
85V 264V 300Vac

Fig. 3-3 Input current vs. output current at Fig. 3-4 Power factor vs. output current at
24V output voltage 24V output voltage
Power Factor, typ.
Input Current, typ.
1.5A (a) 1.0
(b)
1.25 0.95
a) 100Vac (a)
1.0 b) 120Vac (b)
c) 230Vac 0.9
0.75 (c)
0.5 0.85
(a) 100Vac,
(c) (b) 120Vac,
0.25 0.8
Output Current (c) 230Vac
0 Output Current
0.25 0.5 1.0 1.5 2.0 2.5 3A 0.75
0.5 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. 5/28
www.pulspower.com Phone +49 89 9278 0 Germany
 CP5.481, CP5.481-S1-C1
CP-Series 48V, 2.5A, 120W, SINGLE PHASE INPUT

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-bus of a frequency converter is not recommended and can cause a malfunction or damage the unit.
Connect +pole to L, –pole to N and the PE terminal to an earth wire or to the machine ground.

DC input nom. DC 110-150V ±20%

DC input range 88-180Vdc
DC input current typ. 1.21A At 110Vdc, at 48V, 2.5A
typ. 0.43A At 300Vdc, at 48V, 2.5A
Allowed Voltage (+) or (-) input max. 360Vdc Continuous, according to IEC 60664-1
to Earth
Turn-on voltage typ. 74Vdc Steady state value
Shut-down voltage typ. 67Vdc Steady state value

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. 6/28
www.pulspower.com Phone +49 89 9278 0 Germany
 CP5.481, CP5.481-S1-C1
CP-Series 48V, 2.5A, 120W, SINGLE PHASE INPUT

5. INPUT INRUSH CURRENT

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

AC 100V AC 120V AC 230V

Inrush current max. 8Apeak 7Apeak 7Apeak At 40°C, cold start
typ. 4Apeak 4Apeak 4Apeak At 25°C, cold start
typ. 5Apeak 5Apeak 6Apeak At 40°C, cold start
Inrush energy max. 0.4A²s 0.5A²s 1A²s At 40°C, cold start

Fig. 5-1 Typical turn-on behaviour at nominal Fig. 5-2 Typical turn-on behaviour at nominal
load, 120Vac input and 25°C ambient 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. 7/28
www.pulspower.com Phone +49 89 9278 0 Germany
 CP5.481, CP5.481-S1-C1
CP-Series 48V, 2.5A, 120W, SINGLE PHASE INPUT

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 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.

Output voltage nom. 48V

Adjustment range 48-56V Guaranteed value
max. 58.0V 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 settings typ. 48.0V ±0.2%, at full load and cold unit
Line regulation max. 10mV Between 85 and 300Vac
Load regulation max. 50mV Between 0A and 3A, static value, see Fig. 6-1
Ripple and noise voltage max. 50mVpp Load >0.1A, Bandwidth 20Hz to 20MHz, 50Ohm
max. 300mVpp Load <0.1A, Bandwidth 20Hz to 20MHz, 50Ohm
Output current 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
PowerBoost1) 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
Fuse breaking current typ. 7.5A Up to 12ms once every five seconds, see Fig. 6-2.
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 behaviour 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. 3.4A Continuous current, see Fig. 6-1
typ. 5A Intermitted current peak value for typ. 1s
Load impedance 50mOhm, see Fig. 6-3
Discharge current of output capacitors is not included.
max. 1.5A Intermitted current average value (R.M.S.)
Load impedance 50mOhm, see Fig. 6-3
Output capacitance typ. 750µF 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.
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, the
device 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. 8/28
www.pulspower.com Phone +49 89 9278 0 Germany
 CP5.481, CP5.481-S1-C1
CP-Series 48V, 2.5A, 120W, SINGLE PHASE INPUT

Fig. 6-1 Output voltage vs. output current, Fig. 6-2 Dynamic output current capability,
typ. typ.

Output Voltage Adjustment Output Voltage (dynamic behavior, < 12ms)

Range
56V 56V
48 48
A Adjustment
40 40
Range
32 32
24 24
A: continuous current
16 B: intermittent current B 16
8 8
Output Current Output Current
0 0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5A 0 1 2 3 4 5 6 7 8 9 10A

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

Output
Current
Normal Short -circuit Normal
operation operation

5A

t
0
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. 9/28
www.pulspower.com Phone +49 89 9278 0 Germany
 CP5.481, CP5.481-S1-C1
CP-Series 48V, 2.5A, 120W, SINGLE PHASE INPUT

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

AC 100V AC 120V AC 230V

Hold-up Time typ. 70ms 70ms 70ms At 48V, 5A, see Fig. 7-1
min. 55ms 55ms 55ms At 48V, 5A, see Fig. 7-1
typ. 35ms 35ms 35ms At 48V, 2.5A, see Fig. 7-1
min. 27ms 27ms 27ms At 48V, 2.5A, see Fig. 7-1

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

Hold-up Time
90ms a) 48V 1.25A typ. c) 48V 2.5A typ. Zero Transition
b) 48V 1.25A min. d) 48V 2.5A min.
Input
75 a Voltage
60 b
45
30
c - 5%
d
Output
Voltage
15
Input Voltage Hold-up Time
0
90 120 155 190 230Vac

8. DC-OK RELAY CONTACT

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

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 Typically 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 chapter 18.

Fig. 8-1 DC-OK relay contact behavior

VOUT = VADJ

10% 0.9* VADJ

< >
1ms 1...4ms 100ms

open closed open closed

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. 10/28
www.pulspower.com Phone +49 89 9278 0 Germany
 CP5.481, CP5.481-S1-C1
CP-Series 48V, 2.5A, 120W, SINGLE PHASE INPUT

9. EFFICIENCY AND POWER LOSSES

AC 100V AC 120V AC 230V
Efficiency typ. 92.1% 92.6% 93.5% At 48V, 2.5A
typ. 92.0% 92.5% 93.6% At 48V, 3A (PowerBoost)
Average efficiency*) typ. 90.8% 91.1% 91.6% 25% at 0.63A, 25% at 1.25A,
25% at 1.88A, 25% at 2.5A
Power losses typ. 1.5W 1.5W 1.6W At 48V, 0A
typ. 5.8W 5.6W 5.5W At 48V, 1.25A
typ. 10.3W 9.6W 8.4W At 48V, 2.5A
typ. 12.5W 11.7W 9.8W 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, Fig. 9-2 Losses vs. output current at 48V, typ.
typ.

Efficiency Power Losses

95% 12W (a)
(a) 100Vac (b)
94 10 (b) 120Vac (c)
(c)
93 (c) 230Vac
(b) 8
92 (a)
91 (a) 100Vac
6
90 (b) 120Vac
4
(c) 230Vac
89
88 2
Output Current Output Current
87 0
0.5 1 1.5 2 2.5 3A 0 0.5 1 1.5 2 2.5 3A

Fig. 9-3 Efficiency vs. input voltage at 48V, Fig. 9-4 Losses vs. input voltage at 48V, 2.5A,
2.5A, typ. typ.
Efficiency Power Losses
94% 11W
93 10
92 9
91 8
90 7
89 6
Input Voltage Input Voltage
88 5
100 120 180 230 264Vac 100 120 180 230 264Vac

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. 11/28
www.pulspower.com Phone +49 89 9278 0 Germany
 CP5.481, CP5.481-S1-C1
CP-Series 48V, 2.5A, 120W, SINGLE PHASE INPUT

10. FUNCTIONAL DIAGRAM

Fig. 10-1 Functional diagram

L +
Input Fuse
Input Filter Output +
N Input Rectifier
PFC
Converter
Power
Converter Filter
Inrush Current Limiter -
-
Output
Voltage VOUT
Regulator

Temper- Output DC-ok

Output Output LED
ature Power Over- Voltage
Shut- Manager Voltage DC-ok
down Protection Monitor DC-ok
Relay Contact

11. FRONT SIDE AND USER ELEMENTS

Fig. 11-1 Front side Fig. 11-2 Front side

CP5.481 CP5.481-S1-C1
A Input 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 DC-
OK 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. 12/28
www.pulspower.com Phone +49 89 9278 0 Germany
 CP5.481, CP5.481-S1-C1
CP-Series 48V, 2.5A, 120W, SINGLE PHASE INPUT

12. TERMINALS AND WIRING

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

CP5.481 Input Output DC-OK-Signal

Type Screw terminal Screw terminal Push-in terminal
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 Max. 1Nm Max. 1Nm -
Wire stripping length 7mm 7mm 7mm
Screwdriver 3.5mm slotted or cross- 3.5mm slotted or cross- 3mm slotted to open
head No 2 head No 2 the spring

CP5.481-S1-C1 Input Output DC-OK-Signal

Type Spring-clamp terminal Spring-clamp terminal Push-in terminal
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
Wire stripping length 10mm 10mm 7mm
3mm slotted to open
Screwdriver
the spring

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.

Fig. 12-1 Daisy chaining of outputs Fig. 12-2 Using distribution terminals

Distribution
Power Power Terminals
Supply Supply Power Power
Supply Supply
+ + - - + + - - Load
+ + - - + + - - Load
Output Output + -
Output Output + -

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. 13/28
www.pulspower.com Phone +49 89 9278 0 Germany
 CP5.481, CP5.481-S1-C1
CP-Series 48V, 2.5A, 120W, SINGLE PHASE INPUT

13. LIFETIME EXPECTANCY

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

AC 100V AC 120V AC 230V

Lifetime expectancy 161 000h 163 000h 166 000h At 48V, 1.25A and 40°C
456 000h 462 000h 469 000h At 48V, 1.25A and 25°C
57 000h 62 000h 71 000h At 48V, 2.5A and 40°C
161 000h 176 000h 201 000h At 48V, 2.5A and 25°C
35 000h 41 000h 49 000h At 48V, 3A and 40°C
100 000h 115 000h 139 000h At 48V, 3A and 25°C

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

AC 100V AC 120V AC 230V

MTBF SN 29500, IEC 61709 772 000h 778 000h 836 000h At 48V, 2.5A and 40°C
1 353 000h 1 364 000h 1 457 000h At 48V, 2.5A and 25°C
MTBF MIL HDBK 217F 327 000h 331 000h 355 000h At 48V, 2.5A and 40°C;
Ground Benign GB40
473 000h 478 000h 510 000h At 48V, 2.5A and 25°C;
Ground Benign GB25
78 000h 80 000h 86 000h At 48V, 2.5A and 40°C;
Ground Fixed GF40
105 000h 107 000h 115 000h 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. 14/28
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 CP5.481, CP5.481-S1-C1
CP-Series 48V, 2.5A, 120W, SINGLE PHASE INPUT

15. EMC
The 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 Contact discharge 8kV Criterion A
Air discharge 15kV 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 4kV Criterion A
Output lines 2kV Criterion A
DC-OK signal (coupling clamp) 2kV Criterion A
Surge voltage on input EN 61000-4-5 LN 2kV Criterion A
L  PE, N  PE 4kV Criterion A
Surge voltage on output EN 61000-4-5 +- 1kV Criterion A
+ / -  PE 2kV 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 0Vac, 20ms Criterion A
40% of 100Vac 40Vac, 200ms Criterion C
70% of 100Vac 70Vac, 500ms Criterion A
0% of 200Vac 0Vac, 20ms Criterion A
40% of 200Vac 80Vac, 200ms, <2A Criterion A
40% of 200Vac 80Vac, 200ms, >2A Criterion C
70% of 200Vac 140Vac, 500ms 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
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 EN 55011, EN 55032, FCC Part 15, CISPR 11, CISPR 32 Class B
input lines
Conducted emission IEC/CISPR 16-1-2, IEC/CISPR 16-2-1 Limits for local DC power
output lines networks fulfilled
Radiated emission EN 55011, EN 55032 Class B
Harmonic input current (PFC) EN 61000-3-2 Fulfilled for Class A equipment
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 30kHz to 140kHz Input voltage and output load dependent
Main converter 60kHz to 140kHz Output load dependent
Auxiliary converter 30kHz to 60kHz Output load dependent
DC-OK relay converter 18kHz to 25kHz 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. 15/28
www.pulspower.com Phone +49 89 9278 0 Germany
 CP5.481, CP5.481-S1-C1
CP-Series 48V, 2.5A, 120W, SINGLE PHASE INPUT

16. ENVIRONMENT
Operational temperature -25°C to +70°C Operational temperature is the same as the ambient
or surrounding temperature and is defined as the air
temperature 2cm below the unit.
Storage temperature -40°C to +85°C For storage and transportation
Output derating 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 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 110-54kPa See Fig. 16-2 for details
Altitude Up to 5000m 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 62368-1, not conductive
Vibration sinusoidal 2-17.8Hz: ±1.6mm; According to IEC 60068-2-6
17.8-500Hz: 2g
2 hours / axis
Shock 30g 6ms, 20g 11ms According to IEC 60068-2-27
3 bumps per direction, 18
bumps in total
Shock and vibration is tested in combination with DIN rails according to EN 60715 with a
height of 15mm and a thickness of 1.3mm and standard orientation.
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
(Inom 2.5A; Iout with PowerBoost = 3A)

Allowed Output Current at 48V Allowed Output Current at 48V

3A B 3A C
B
2.5A 2.5A
A A
1.9A 2A

A... Tamb < 60°C

A... 85 to 264Vac, continuous B... Tamb < 45°C
B... short term C... Short term

0
Altitude 0m 2000m 5000m
-25 0 45 60 70°C
AP*) 110kPa 80kPa 54kPa
Ambient Temperature *) Atmospheric pressure

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. 16/28
www.pulspower.com Phone +49 89 9278 0 Germany
 CP5.481, CP5.481-S1-C1
CP-Series 48V, 2.5A, 120W, SINGLE PHASE INPUT

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 performs three restart attempts. If the
failure continues, the output shuts down. Cycle input power to reset.
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 shut-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 derating 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 For protection values see chapter 15 (EMC).
Varistor)
Internal input fuse Included Not user replaceable slow-blow high-braking
capacity fuse
Touch current (leakage current) typ. 0.10mA / 0.27mA At 100Vac, 50Hz, TN-,TT-mains / IT-mains
typ. 0.13mA / 0.38mA At 120Vac, 60Hz, TN-,TT-mains / IT-mains
typ. 0.20mA / 0.60mA At 230Vac, 50Hz, TN-,TT-mains / IT-mains
max. 0.13mA / 0.35mA At 110Vac, 50Hz, TN-,TT-mains / IT-mains
max. 0.17mA / 0.51mA At 132Vac, 60Hz, TN-,TT-mains / IT-mains
max. 0.27mA / 0.81mA At 264Vac, 50Hz, TN-,TT-mains / IT-mains

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. 17/28
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 CP5.481, CP5.481-S1-C1
CP-Series 48V, 2.5A, 120W, SINGLE PHASE INPUT

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 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.

Fig. 18-1 Dielectric strength A B C D

Input DC-ok Type test 60s 2500Vac 3000Vac 1000Vac 500Vac
*)
L B Routine test 5s 2500Vac 2500Vac 500Vac 500Vac
N
Field test 5s 2000Vac 2000Vac 500Vac 500Vac
A D
Field test cut-off > 10mA > 10mA > 20mA > 1mA
B

current settings
Earth, PE Output B*)
C + 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.

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. 18/28
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 CP5.481, CP5.481-S1-C1
CP-Series 48V, 2.5A, 120W, SINGLE PHASE INPUT

19. APPROVED, FULFILLED OR TESTED STANDARDS

IEC 61010-2-201 CB Scheme Certificate
Electrical Equipment for Measurement, Control and Laboratory Use -
Particular requirements for control equipment
UL 61010-2-201 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
IEC 62368 CB Scheme Certificate
IEC 62368-1 Audio/video, information and communication technology
equipment - Safety requirements
Output safety level: ES1
ATEX Agency Certificate (Bureau Veritas)
(only CP5.481) 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 IECEx Certificate
(only CP5.481) 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
Class I Div 2 UL Certificate
(only CP5.481) 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
IEC 61558-2-16 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
VDMA 24364 Paint Wetting Impairment Substances Test (or LABS-Test)
Tested for Zone 2 and test class C1 according to VDMA 24364-C1-L/W
for solvents and water-based paints

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. 19/28
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 CP5.481, CP5.481-S1-C1
CP-Series 48V, 2.5A, 120W, SINGLE PHASE INPUT

20. REGULATORY PRODUCT COMPLIANCE

EU Declaration of The CE mark indicates conformance with the
Conformity - EMC directive
- Low-voltage directive
- RoHS directive
REACH Regulation (EU) Manufacturer's Declaration
EU regulation regarding the Registration, Evaluation,
Authorisation and Restriction of Chemicals (REACH) fulfilled.
EU Regulation (EC) 1907/2006.
WEEE Regulation Manufacturer's Declaration
EU Regulation on Waste Electrical and Electronic Equipment
Registered as business to business (B2B) products.
EU Regulation 2012/19/EU
CCC CCC Certificate
China Compulsory Certification (CNCA-C23-01:2019)
Certificate for devices made in Suzhou/China (PULS
Electronics): 2021122303114443
Certificate for devices made in Chomutov/Czech Republic
(PULS investiční): 2021122303114444
CCC-Ex
UKCA UKCA Declaration of Conformity
Trade conformity assessment for England, Scotland and Wales
The 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. 20/28
www.pulspower.com Phone +49 89 9278 0 Germany
 CP5.481, CP5.481-S1-C1
CP-Series 48V, 2.5A, 120W, SINGLE PHASE INPUT

21. PHYSICAL DIMENSIONS AND WEIGHT

Width 32mm
Height 124mm
Depth 102mm
The DIN rail depth must be added to the unit depth to calculate the total required
installation depth.
Weight 440g
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 3.5mm

Fig. 21-1 Fig. 21-2 Fig. 21-3

Front view Front view Side view
CP5.481 CP5.481-S1-C1

All dimensions in mm
All 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. 21/28
www.pulspower.com Phone +49 89 9278 0 Germany
 CP5.481, CP5.481-S1-C1
CP-Series 48V, 2.5A, 120W, SINGLE PHASE INPUT

22. ACCESSORIES

22.1. ZM10.WALL - WALL/PANEL MOUNT BRACKET

This 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 view Fig. 22-2 Isometric view Fig. 22-3 Isometric view

Fig. 22-4 Wall/panel mounting, front Fig. 22-5 Hole pattern for wall Fig. 22-6 Wall/panel mounting,
view mounting side view

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. 22/28
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 CP5.481, CP5.481-S1-C1
CP-Series 48V, 2.5A, 120W, SINGLE PHASE INPUT

22.2. YR2.DIODE - REDUNDANCY MODULE

The 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 by
utilizing 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 short
circuit across the output.
For a safe and vibration resistant wiring, the device is equipped with time saving quick connect spring
clamp 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 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.

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. 23/28
www.pulspower.com Phone +49 89 9278 0 Germany
 CP5.481, CP5.481-S1-C1
CP-Series 48V, 2.5A, 120W, SINGLE PHASE INPUT

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 load
branches are often individually protected with circuit breakers or fuses. In case of a short or an overload in one branch
circuit, the fuse or circuit breaker need a certain amount of over-current to open in a timely manner. This avoids
voltage loss in adjacent circuits.
The extra current (peak current) is supplied by the power converter and the built-in large sized output capacitors of
the power supply. The capacitors get discharged during such an event, which causes a voltage dip on the output. The
following three examples show typical voltage dips for resistive loads:

Fig. 23-1 5A peak current for 50ms , typ. Fig. 23-2 12.5A peak current for 5ms , typ.
(2x the nominal current) (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 At 5A for 50ms and resistive load
Typically from 48V to 41V At 12.5A for 2ms and resistive load
Typically from 48V to 34V 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. 24/28
www.pulspower.com Phone +49 89 9278 0 Germany
 CP5.481, CP5.481-S1-C1
CP-Series 48V, 2.5A, 120W, SINGLE PHASE INPUT

23.2. CHARGING OF BATTERIES

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 for mains voltage of AC 120V or
higher and 35°C for a mains voltage of AC 100V.
c) Use a 6A 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 12mA. 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 output voltage, measured at no load and at the battery end of the cable, very precisely to the end-of-
charge 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 -
Output
the output voltage does not exceed 150Vdc. Voltages with a potential above +
60Vdc must be installed with a protection against touching. Unit B
Load
Input
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
-
Output
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.

23.4. PARALLEL USE TO INCREASE OUTPUT POWER Unit A

Input

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 -
Output
all devices, or the devices can be left with the factory settings. +
The ambient temperature is not allowed to exceed +40°C. Unit B
Load
Input
If more than three devices are connected in parallel, a fuse or circuit breaker + -
with a rating of 6A is required on each output. Alternatively, a diode or
redundancy module can also be utilized. -
Output
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.

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. 25/28
www.pulspower.com Phone +49 89 9278 0 Germany
 CP5.481, CP5.481-S1-C1
CP-Series 48V, 2.5A, 120W, SINGLE PHASE INPUT

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 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 +40°C.

Wiring examples:
Fig. 23-4 Fig. 23-5
1+1 Redundant configuration for 2.5A load N+1 Redundant configuration for 7.5A load current with
current with a dual redundancy module multiple power supplies and redundancy modules

Failure
Failure Monitor
Monitor
+ + - - + - + - + + - - + + - - + - + - + + - -
+ + - - + - + - + + - - Output Input Input Output Output Input Input Output
Output Input Input Output 48V, 2.5A 1 2 48V, 2.5A 48V, 2.5A 1 2 48V, 2.5A
48V, 2.5A 1 2 48V, 2.5A

DC- o DC- o DC- o DC- o

DC- o DC- o OK o YR2.DIODE OK o OK o YR2.DIODE OK o
OK o YR2.DIODE OK o Redundancy Redundancy
Redundancy Power Module Power Power Module Power
Power Module Power Supply Supply Supply Supply
Supply Supply

Input Output Input Input Output Input

Output
Input Input L N PE + - L N PE L N PE + - L N PE
L N PE + - L N PE
7.5A
2.5A Load
Load
optional

optional
optional

I I I I
I I
L
L
N
N
PE
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. 26/28
www.pulspower.com Phone +49 89 9278 0 Germany
 CP5.481, CP5.481-S1-C1
CP-Series 48V, 2.5A, 120W, SINGLE PHASE INPUT

23.6. OPERATION ON TWO PHASES

Power Supply
The power supply can also be used on two-phases of a three-phase-system. L1 AC
Such a phase-to-phase connection is allowed as long as the supplying

240V +10% max.

voltage is below 240V+10%. L
Ensure that the wire, which is connected to the N-terminal, is L3 N
appropriately fused.
PE
The maximum allowed voltage between a Phase and the PE must be
below 300Vac. 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.
Case A Case B
Enclosure size 110x180x165mm 110x180x165mm
Rittal Typ IP66 Box Rittal Typ IP66 Box
PK 9516 100, PK 9516 100,
plastic plastic
Input voltage 230Vac 230Vac
Load 48V, 2A; (=80%) 48V, 2.5A; (=100%)
Temperature inside the box 39.1°C 40.5°C
Temperature outside the box 25.8°C 25.4°C
Temperature rise 13.3K 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. 27/28
www.pulspower.com Phone +49 89 9278 0 Germany
 CP5.481, CP5.481-S1-C1
CP-Series 48V, 2.5A, 120W, SINGLE PHASE INPUT

23.8. MOUNTING ORIENTATIONS

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.

Fig. 23-6 Allowed Output Current at 48V

Mounting OUTPUT 3A
Orientation A 2.5A
(Standard
orientation) Power 1.9A
Supply

0
INPUT +45 +60 +70°C
Ambient Temperature

Fig. 23-7 Allowed Output Current at 48V

Mounting INPUT
3A
Orientation B
(Upside down) 2A
Supply
Power

OUTPUT 0
+30 +60 +70°C
Ambient Temperature

Fig. 23-8 Allowed Output Current at 48V

Mounting 3A
Orientation C
(Table-top
mounting) 1.5A

0
+25 +60 +70°C
Ambient Temperature

Fig. 23-9 Allowed Output Current at 48V

Mounting 3A
Orientation D
(Horizontal cw)
OUTPUT
Supply

1.5A
Power
INPUT

0
+25 +60 +70°C
Ambient Temperature

Fig. 23-10 Allowed Output Current at 48V

Mounting 3A
Orientation E
(Horizontal ccw)
OUTPUT

1.5A
Supply
Power

INPUT

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. 28/28
www.pulspower.com Phone +49 89 9278 0 Germany