CP10.241-60
24V, 200W, DC/DC CONVERTER

CP-Series

DC/DC CONVERTER
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EN 50155 Railway Compliant
Conformal Coated PC-boards
Quick-connect Spring-clamp Terminals
67-154Vdc Wide-range Input
Width only 39mm
Efficiency up to 94.5%
Excellent Partial Load Efficiency
Minimal Inrush Current Surge
Full Power Between -40°C and +70°C
DC-OK Relay Contact
Reverse Input Polarity Protected
3 Year Warranty

PRODUCT DESCRIPTIONSHORT-FORM DATAThe DC/DC converter CP10.241-60 is designed specifically for
railway & transportation applications. It is approved according
to the EN 50155 standard, which is an international standard
covering electronic equipment used on rolling stock for railway
applications. The standard covers aspects such as temperature,humidity, shock, vibration, EMI and other parameters. Becauseof these requirements, the unit is equipped with conformal
coated pc-boards.

Output voltage
Adjustment range
Output current

The unit features a DC-OK signal contact for remote monitoring,and quick-connect spring-clamp terminals for a reliable
connection even when mechanical vibration and shock are
involved. The unit also covers an extreme wide temperature
range from -40°C up to +70°C with full output current.

Input voltage DC
Input voltage range
Input current DC
Input inrush current
Efficiency
LossesHold-up time
Temperature range
Size (W x H x D)
WeightDC 24V24 - 28V
8.3 – 7.1A
8.3 – 7.1A
DC 96 - 110V
67.2 – 154V
2.25 / 1.95A
2.5A pk
94.3 / 94.5%
12.1 / 11.6W
34ms-40 to +70°C
39x124x117mm
620g

NominalFactory setting 24.1V

Continuous, < +70°C
For 10 minutes, < +85°C- 30%/ +40%
At 96 / 110Vdc
At 96 / 110Vdc
At 96 / 110Vdc

Without DIN railThis DC/DC converter comes in a very compact housing andrequires only 39mm space on the DIN rail due to the highefficiency and low power losses. The high efficiency is achievedby utilizing cutting edge technology and other unique design
techniques.

ORDER NUMBERS

MAIN APPROVALS
For details and the complete approval list, see chapter 19.

DC/DC converter
CP10.241-60
Accessory

ZM10.WALL
ZM12.SIDE

Wall/panel mount bracket
Side mount bracket

RailroadAug. 2023 / Rev. 1.1 DS-CP10.241-60-EN All parameters are typical values specified at 24V, 8.3A output, 110Vdc input,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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CP10.241-60
24V, 200W, DC/DC CONVERTER

CP-Series

INDEX
Page
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.

Intended Use .....................................................................3
Installation Instructions .....................................................3
DC-Input.............................................................................5
AC-Input .............................................................................6
Input Inrush Current ..........................................................6
Output ...............................................................................7
Hold-up Time .....................................................................8
DC-OK Relay Contact..........................................................9
Functional Diagram ............................................................9
Efficiency and Power Losses ............................................10
Lifetime Expectancy .........................................................11
MTBF................................................................................11
Terminals and Wiring .......................................................12
Front Side and User Elements ..........................................13
EMC .................................................................................14
Environment ....................................................................15
Dielectric Strength ...........................................................16
Safety and Protection Features .......................................17
Approved, Fulfilled or Tested Standards ..........................18Page
20. Regulatory Product Compliance ...................................... 19
21. Physical Dimensions and Weight ..................................... 20
22. Accessories ...................................................................... 21
22.1. ZM10.WALL - Wall/Panel Mount Bracket ............. 21
22.2. ZM12.SIDE - Side Mounting Bracket ..................... 2222.3. UF20.241 Buffer Module ...................................... 23
22.4. YR20.242 - Redundancy Module .......................... 23
22.5. YR20.246 - Redundancy Module with AutomatedLoad Sharing ...................................................................... 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. Use in a Tightly Sealed Enclosure ......................... 27
23.7. 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 the word. As the state of ourknowledge 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.

TERMINOLOGY AND ABBREVIATIONSPE andsymbolPE is the abbreviation for Protective Earth and has the same meaning as the symbol.

Earth, Ground

This document uses the term “earth” which is the same as the U.S. term “ground”.

t.b.d.

To be defined, value or description will follow later.

DC 110V

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)

110VdcA figure with the unit (Vdc) at the end is a momentary figure without any additional tolerances included.

may

A key word indicating flexibility of choice with no implied preference.

shall

A key word indicating a mandatory requirement.

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

Aug. 2023 / Rev. 1.1 DS-CP10.241-60-EN All parameters are typical values specified at 24V, 8.3A output, 110Vdc input,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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CP10.241-60
24V, 200W, DC/DC CONVERTER

CP-Series

1. INTENDED USEThis device is designed for installation in an enclosure and is intended for use in rolling stock equipment for railway applications
according to EN 50155 or for use in industrial control, process control, monitoring and measurement 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 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 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 aminimum 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.
The device is designed for pollution degree 2 areas in controlled environments. No condensation or frost allowed.
The enclosure of the device provides a degree of protection of IP20.
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 can be powered from a regulated power supply or a similar DC source. The voltage between the supply voltage terminals andground must not exceed 150Vdc continuously.
A disconnecting means shall be provided for the input of the device.
The device is designed for convection cooling and does not require an external fan. Do not obstruct airflow and do not cover ventilation
grid!
The device is designed for altitudes up to 5000m. See additional requirements in the product datasheet for use above 2000m.
Keep the following minimum installation clearances: 40mm on top, 20mm on the bottom, 5mm left and right side. Increase the 5mm to15mm 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 20A without additional protection device. If an external fuse isutilized, do not use circuit breakers smaller than 6A B- or 4A C-Characteristic to avoid a nuisance tripping of the circuit breaker.

Aug. 2023 / Rev. 1.1 DS-CP10.241-60-EN All parameters are typical values specified at 24V, 8.3A output, 110Vdc input,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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CP10.241-60
24V, 200W, DC/DC CONVERTER

CP-Series

The maximum surrounding air temperature is +85°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.
Check for correct input polarity. The device will not operate when the voltage is reversed.

Aug. 2023 / Rev. 1.1 DS-CP10.241-60-EN All parameters are typical values specified at 24V, 8.3A output, 110Vdc input,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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CP10.241-60
24V, 200W, DC/DC CONVERTER

CP-Series

3. DC-INPUT
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.
Input voltage
Input voltage rangeNom.

-30%/+40%

Typ.
Typ.

DC 96-110V
67-154Vdc
57-67Vdc
2.25A
1.95A

Input current
Allowed voltage between input to earth(ground)
Allowed input ripple voltage

Max.

300VdcContinuous, IEC 62477-1

Max.

15Vpp
3Vpp

50Hz –10kHz
10kHz – 50kHz

Turn-on voltage
Shut-down voltage

Typ.
Typ.

64.5Vdc
62.5Vdc

Steady-state value, temperature independent, see Fig. 3-1
Steady-state value, temperature independent, see Fig. 3-1

Start-up delay

Typ.
Typ.
Typ.
Typ.

700ms
600ms
45ms
90ms
Included

At 96Vdc input, see Fig. 3-2
At 110Vdc input, see Fig. 3-2
At 8.3A constant current load, 0mF load capacitanceAt 8.3A constant current load, 8mF load capacitance, see Fig. 3-2
The device will not operate when the voltage is reversed.

Turn-on overshoot

Max.

200mV

See Fig. 3-2

External input protection

See recommendations in chapter 2.

Reverse input polarity protection

Fig. 3-1 Input voltage range

Rated
input range

max.
500ms

Turn-onShut -dow n

POUT

Fig. 3-2 Turn-on behavior, definitions

Input
Voltage

OutputVoltage

VIN
67V

154V

- 5%
Start-up Rise
delay
Time

OvershootRise time

Short term for 2s, no start at 57Vdc
At 8.3A and 96Vdc input voltage, see Fig. 3-3
At 8.3A and 110Vdc input voltage, see Fig. 3-3

375VdcFig. 3-3 Input current vs. output load at 24V
Input Current, typ.

3A
2.5(a) 96Vdc,(b) 110Vdc

2.0

(a)
(b)

1.5
1.0
0.5
0

0

1

2

3

4

5

6

7

8 9A

Output Current

Aug. 2023 / Rev. 1.1 DS-CP10.241-60-EN All parameters are typical values specified at 24V, 8.3A output, 110Vdc input,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

5/28

CP10.241-60
24V, 200W, DC/DC CONVERTER

CP-Series

4. AC-INPUT
Do not operate this DC/DC converter with an AC-input voltage. Use the CP10.241 or CP10.241-C1 (when conformal coating is needed)
unit instead.

5. INPUT INRUSH CURRENT
An active inrush limitation circuit (inrush limiting fixed resistor which is bypassed by a relay) limits the input inrush current after turn-onof the input voltage.
The charging current into EMI suppression capacitors is disregarded in the first microseconds after switch-on.

Inrush current

Max.
Typ.
Max.

Inrush energy

DC 96V
8Apeak
2.5Apeak
0.1A²s

DC 110V
8Apeak
2.5Apeak
0.1A²sTemperature independent
Temperature independent
Temperature independentFig. 5-1 Typical input inrush current behaviour at nominal loadand 25°C ambient

50ms/DIV
Input
current
0.5A/DIV

Input
voltage
20V/DIV
Output voltage 5V/DIV

Aug. 2023 / Rev. 1.1 DS-CP10.241-60-EN All parameters are typical values specified at 24V, 8.3A output, 110Vdc input,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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CP10.241-60
24V, 200W, DC/DC CONVERTER

CP-Series

6. OUTPUT
The output provides a SELV/PELV/ES1 rated voltage, which is galvanically isolated from the input voltage.
The device is designed to supply any kind of loads, including capacitive and inductive loads. If extreme large capacitors, such as EDLCs(electric double layer capacitors or “UltraCaps”) with a capacitance >1.5F are connected, the unit might charge the capacitor in anintermittent mode.
Output voltage
Adjustment range

Max.

24V
24-28V
30V

Typ.
Max.
Max.
Max.
Nom.

24.1V ±0.2%
10mV
100mV
50mVpp
8.3A

Nom.

7.1A

Fuse breaking current1)
Overload protection

Typ.

30A
IncludedOverload behaviour

Continuous current
Intermitted current2)
Max. 10.6A
Typ.
11.5A

Factory settingLine regulation
Load regulation
Ripple and noise voltage
Output current

Overload/ short-circuit current

Output capacitanceBack-feeding loads

Nom.

Max.

4.3A

Typ.

4 400µF

Max.

35V

Guaranteed
This is the maximum output voltage which can occur at theclockwise end position of the potentiometer due totolerances. It is not a guaranteed value which can be achieved.
At full load, cold unit
Between 67 and 154Vdc
Between 0A and 8.3A, static value
Bandwidth 20Hz to 20MHz, 50Ohm
At 24V and an ambient temperature below 70°C or at +85°C
for maximum 10 minutes.
At 28V and an ambient temperature below 70°C or at +85°C
for maximum 10 minutes.
Up to 12ms once every five seconds, see Fig. 6-2.
Electronically protected against overload, no-load and shortcircuits. In case of a protection event, audible noise may occur.
Output voltage above 13Vdc, see Fig. 6-1
Output voltage below 13Vdc, see Fig. 6-1
Continuous current, see Fig. 6-1
Intermitted current peak value for typ. 2s
Load impedance 50mOhm, see Fig. 6-3
Discharge current of output capacitors is not included.
Intermitted current average value (R.M.S.)
Load impedance 50mOhm, see Fig. 6-3
Included inside the power supply
The unit is resistant and does not show malfunctioning when aload feeds back voltage to the power supply. It does notmatter whether the power supply is on or off. The absorbing
energy can be calculated according to the built-in large sized
output capacitor.

1) The fuse braking current is an enhanced transient current which helps to start heavy loads or to trip fuses on faulty output branches. The output voltage stays
above 20V. See chapter 25.1 for additional measurements.
2) At heavy overloads (when output voltage falls below 13V), the power supply delivers continuous output current for 2s. After this, the output is switched off forapprox. 18s before a new start attempt is automatically performed. This cycle is repeated as long as the overload exists. If the overload has been cleared, thedevice will operate normally. see Fig. 6-2.

Aug. 2023 / Rev. 1.1 DS-CP10.241-60-EN All parameters are typical values specified at 24V, 8.3A output, 110Vdc input,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

7/28

CP10.241-60
24V, 200W, DC/DC CONVERTER

CP-Series

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

Output Voltage

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

Output Voltage (dynamic behavior, < 12ms)

Adjustment Range

28V

28V
24

24

A

20

20

16

16

Adjustment
Range

12

12
A: continuous current
B: intermitted current

8
4
0

8

B

4
0

Output Current

0

2

4

6

8

10

Output Current

0

12A

5 10 15 20 25 30 35 40 45 50A

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

Normaloperation

Short -circuit

11.5A

t

0
2s

18s

2s

18s

2s

18s

7. HOLD-UP TIME
The internal capacitor, which supplies the energy for the hold-up time is isolated by a diode to the input voltage. A short on the input
line does not discharge the internal hold-up capacitor.

Hold-up TimeDC 96V
72ms
54ms
34ms
26ms

Typ.
Min.
Typ.
Min.

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

DC 110V
72ms
54ms
34ms
26ms

At 4.15A, see Fig. 7-1
At 4.15A, see Fig. 7-1
At 8.3A, see Fig. 7-1
At 8.3A, see Fig. 7-1
X

X

X

X

X

X

X

X

Fig. 7-2 Shut-down behavior, definitions

Hold-up Time

75ms

at 4.15A, typ.

60

at 4.15A, min.

45

Input
Voltage

at 8.3A, typ.

30
at 8.3A, min.

15

- 5%

OutputVoltage
Hold-up Time

0
70

90

110

130

150VdcInput Voltage

Aug. 2023 / Rev. 1.1 DS-CP10.241-60-EN All parameters are typical values specified at 24V, 8.3A output, 110Vdc input,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

8/28

CP10.241-60
24V, 200W, DC/DC CONVERTER

CP-Series

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.
1V
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

>
1ms

closed0.9* VADJ

100ms

open

closed

9. FUNCTIONAL DIAGRAM
Fig. 9-1 Functional diagram
OutputVoltage
Regulator+-

Reverse Polarity
and Back-feeding
Protection

Input Fuse
Input Filter
Active Inrush
Limiter

Boost
Converter(preconditioning)

Power
Converter

OutputFilter

VOUT

+
+
DC-ok
LED

Temperature
Shutdown

OutputPower
Manager

OutputOverVoltage
Protection

OutputVoltage
Monitor

DC-ok
Relay

Aug. 2023 / Rev. 1.1 DS-CP10.241-60-EN All parameters are typical values specified at 24V, 8.3A output, 110Vdc input,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

DC-okcontact

9/28

CP10.241-60
24V, 200W, DC/DC CONVERTER

CP-Series

10. EFFICIENCY AND POWER LOSSES
Efficiency
Average efficiency*)

Typ.
Typ.

DC 96V
94.3%
93.1%

DC 110V
94.5%
93.5%

Power losses

Typ.
Typ.
Typ.

2.8W
7.2W
12.1W

2.6W
6.8W
11.6W

*)

At 24V, 8.3A
25% at 2.1A, 25% at 4.15A,
25% at 6.2A. 25% at 8.3A
At 24V, 0A
At 24V, 4.2A (= 50% load)
At 24V, 8.3A

The average efficiency is an assumption for a typical application where the DC/DC converter 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 thetime.

Fig. 10-1 Efficiency vs. output current, at 24V, typ.

Fig. 10-2 Losses vs. output current, at 24V, typ.

Efficiency

Power Losses

95%
94
93
92
91
90
89
88
87

(b)
(a)

(a)
(b)

12W
10
8

(a) 96Vdc,(b) 110Vdc

6(a) 96Vdc,(b) 110Vdc

42
Output Current

1

2

3

4

5

6

7

8

9A

Output Current

0
0

1

2

3

4

Aug. 2023 / Rev. 1.1 DS-CP10.241-60-EN All parameters are typical values specified at 24V, 8.3A output, 110Vdc input,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

5

6

7

8 9A

10/28

CP10.241-60
24V, 200W, DC/DC CONVERTER

CP-Series

11. 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 and is calculated according to thecapacitor’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

DC 96V
171 000h
485 000h
112 000h
316 000h

DC 110V
194 000h
549 000h
119 000h
336 000h

At 24V, 4.2A and 40°C
At 24V, 4.2A and 25°C
At 24V, 8.3A and 40°C
At 24V, 8.3A and 25°C

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

DC 96V758 000h
1 337 000h
291 000h
404 000h
72 000h
93 000h

DC 110V
775 000h
1 362 000h
292 000h
406 000h
72 000h
94 000h

At 24V, 8.3A and 40°C
At 24V, 8.3A and 25°C
At 24V, 8.3A and 40°C, Ground Benign GB40
At 24V, 8.3A and 25°C, Ground Benign GB25
At 24V, 8.3A and 40°C, Ground Fixed GF40
At 24V, 8.3A and 25°C, Ground Fixed GF25

Aug. 2023 / Rev. 1.1 DS-CP10.241-60-EN All parameters are typical values specified at 24V, 8.3A output, 110Vdc input,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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CP10.241-60
24V, 200W, DC/DC CONVERTER

CP-Series

13. TERMINALS AND WIRING
The terminals are IP20 finger safe constructed and suitable for field- and factory wiring.
Type
Solid wire
Stranded wire
American Wire Gauge
Max. wire diameter
Wire stripping length
Screwdriver
Recommended tightening torque

Input and output
Quick-connect spring-clamp terminals
Max. 6mm2Max. 4mm2
AWG 20-102.8mm (including ferrules)
10mm
Not required
Not applicable

DC-OK-Signal
Push-in terminals
Max. 1.5mm2Max. 1.5mm2Max. AWG 28-16
1.6mm (including ferrules)
7mm
3mm slotted to open the spring
Not applicable

Instructions for wiring:a) Use appropriate copper cables that are designed for minimum operating temperatures of:
60°C for ambient up to 45°C and
75°C for ambient up to 60°C minimum
90°C for ambient up to 70°C minimum.
b) Follow national installation codes and installation regulations!
c) Ensure that all strands of a stranded wire enter the terminal connection!
Daisy chaining:
Daisy chaining (jumping from one DC/DC converter 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. 13-2 .
X

Fig. 13-1 Daisy chaining of outputs

X

Fig. 13-2 Using distribution terminals

max 25A!

OutputOutput

+ + -

+ + -

-

-

+

-

Load

OutputOutput

+ + -

+ + -

-

-

DC/DC
Converter

DC/DC
Converter

DC/DC
Converter

DC/DC
Converter

Input

Input

Input

Input

Aug. 2023 / Rev. 1.1 DS-CP10.241-60-EN All parameters are typical values specified at 24V, 8.3A output, 110Vdc input,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

+

-

Load

Distribution
Terminals

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CP10.241-60
24V, 200W, DC/DC CONVERTER

CP-Series

14. FRONT SIDE AND USER ELEMENTS
Fig. 14-1 Front sideA

Input Terminals(Quick-connect spring-clamp terminals)+
Positive input–
Negative (return) input
PE (Protective Earth) input

B

Output Terminals(Quick-connect spring-clamp terminals, two positive pins and three negative pins)+
Positive output–
Negative (return) output

C

Output voltage potentiometer
Open the flap to adjust the output voltage. Factory set: 24.1V

D

DC-OK LED (green)
On, when the output voltage is >90% of the adjusted output voltage

E

DC-OK Relay Contact(Push-in terminals)
The DC-OK relay contact is synchronized with the DC-OK LED.
See chapter 8 for details.
X

X

Aug. 2023 / Rev. 1.1 DS-CP10.241-60-EN All parameters are typical values specified at 24V, 8.3A output, 110Vdc input,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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24V, 200W, DC/DC CONVERTER

CP-Series

15. EMCThe EMC behavior of the DC/DC converter is designed for rolling stock railway applications and for applications in industrial
environments.
EMC Immunity
Electrostatic discharge
Electromagnetic RF field
Fast transients (Burst)

Surge voltage on input
Surge voltage on output
Surge voltage on DC-OK
Conducted disturbancePower – Frequency magnetic
field
Pulsed magnetic field

According to generic standards EN 61000-6-1 and EN 61000-6-2 and according to the railway standard
EN 50121-3-2.
EN 61000-4-2
Contact discharge
8kV
Criterion A
Air discharge
15kV
Criterion A
EN 61000-4-3
80MHz-2.7GHz
20V/m
Criterion A
5.1-6GHz
10V/m
Criterion A
EN 61000-4-4
Input lines
4kV
Criterion A
Output lines
2kV
Criterion A
DC-OK signal (coupling clamp)
2kV
Criterion A
EN 61000-4-5+→2kV
Criterion A+ → PE, - → PE
4kV
Criterion A
EN 61000-4-5+→1kV
Criterion A+ / - → PE
2kV
Criterion A
EN 61000-4-5
DC-OK signal → PE
1kV
Criterion A
EN 61000-4-6
0.15-80MHz
10V
Criterion A
EN 61000-4-8
16.7Hz, 50Hz
100A/mCriterion A
0Hz
300A/mCriterion A
EN 61000-4-9
300A/mCriterion B

Criterions:
A: DC/DC converter shows normal operation behavior within the defined limits.
B: During the test the output voltage can slightly drift below or above the specified limits.

EMC Emission
Conducted emission
input lines

According to the generic standard EN 61000-6-4 and according to railway standard EN 50121-3-2.
CISPR 16-1-2, CISPR 16-2-1
Limits for EN 50121-3-2 fulfilled,
limits for DC power port according
EN 61000-6-4 fulfilled
Conducted emission
CISPR 16-1-2, CISPR 16-2-1
Limits for EN 50121-3-2 fulfilled,
output lines
limits for DC power port according
EN 61000-6-4 fulfilled
Radiated emission
EN 55011, EN 55032, EN 50121-3-2Class B
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
Boost converter
Main converter
Auxiliary converter

100kHz110kHz to 140kHz
60kHz

Fixed frequency
Input voltage and output load dependent
Fixed frequency

Aug. 2023 / Rev. 1.1 DS-CP10.241-60-EN All parameters are typical values specified at 24V, 8.3A output, 110Vdc input,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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CP10.241-60
24V, 200W, DC/DC CONVERTER

CP-Series

16. ENVIRONMENT
Operational temperature

Storage temperature
Output derating

Humidity
Atmospheric pressure
AltitudeOver-voltage category

Degree of pollution
Vibration sinusoidal
Vibration broadband

Shock

Audible noise-40°C to +70°C

The operational temperature is the ambient or
surrounding temperature and is defined as the airtemperature 2cm below the device.
+70°C to +85°C
For maximal 10 minutes every hour
-40°C to +85°C
For storage and transportation
12W/1000m or 5°C/1000m
For altitudes >2000m, see Fig. 16-2
7.5W/-5kPa or 3°C/-5kPa
For atmospheric pressures <80kPa, see Fig. 16-2
The derating is not hardware controlled. The customer has to take care by himself to stay below thederated current limits in order not to overload the unit.
5 to 95% r.h.
According to IEC 60068-2-30
Do not energize while condensation is present.
110-47kPa
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
and atmospheric pressures from 110 to 80kPa
II
According to IEC 60664-1 for altitudes from 2000 to
5000m and atmospheric pressures from 80 to 47kPa
2
According to IEC 62477-1, not conductive
2-17.8Hz: ±1.6mm; 17.8-500Hz: 2g***)According to IEC 60068-2-6; DC/DC converter in
2 hours / axis
operation
1.01grms for 10 minutes; 5-150Hz***)According to IEC 60068-2-64, DC/DC converter inoperation, Tests limits according to EN 61373
5.72grms for 300 minutes; 5-150Hz***)According to IEC 60068-2-64, DC/DC converter not in
operation; Tests limits according to EN 61373
30g 6ms, 20g 11ms, 50g 30ms***)According to IEC 60068-2-27; DC/DC converter in
3 bumps / direction, 18 bumps in total
operation
50g 30ms***)According to IEC 60068-2-27, DC/DC converter not in
3 bumps / direction, 18 bumps in total
operation; Tests limits according to EN 61373
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.
Some audible noise may be emitted from the power supply during no load, overload or short circuit.

Aug. 2023 / Rev. 1.1 DS-CP10.241-60-EN All parameters are typical values specified at 24V, 8.3A output, 110Vdc input,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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CP10.241-60
24V, 200W, DC/DC CONVERTER

CP-Series

Fig. 16-1 Output current vs. ambient temp. at 24V output
voltageFig. 16-2 Output current vs. altitude at 24V output
voltageAllowable Output Current
Allowed Output Current

10A

10A

8

8.3A

8

A

6

6

B

4

A... continuous
B... for maximal 10 minutes

4

2

2
0
-40

-20

0

20

40

0
Altitude 0mAP*) 110kPa

60 70 85°C

2000m
80kPa

4000m
62kPa

5000m
54kPa

*) Atmospheric pres sureAmbient Temperature

17. DIELECTRIC STRENGTH
The output voltage is floating and has no ohmic connection to the ground. Type and routine tests are conducted by the manufacturer.
Field tests may be conducted in the field using the appropriate test equipment, which applies the voltage with a slow ramp (2s up and 2sdown). Connect all input-terminals together as well as all output poles before conducting the test. When testing, set the cut-off current
settings to the value in the table below.
Type test

60s

A
2500Vac

B
3000Vac

C
500VacD
500VacRoutine test

5s

2500Vac

2500Vac

500Vac

500VacField test

5s

2000Vac

2000Vac

500Vac

500VacCut-off current setting> 15mA> 15mA> 50mA> 5mA

Fig. 17-1 Dielectric strength

Input

DC-ok
B* )

+

B

A

D
OutputEarth, PEC+-

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

B*) When testing input to DC-OK ensure that the maximum voltage between DC-OK and the output is not exceeded (column D). We recommend connecting DCOK pins and the output pins together when performing the test.

Aug. 2023 / Rev. 1.1 DS-CP10.241-60-EN All parameters are typical values specified at 24V, 8.3A output, 110Vdc input,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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CP10.241-60
24V, 200W, DC/DC CONVERTER

CP-Series

18. SAFETY AND PROTECTION FEATURES
Isolation resistance

Min.

500MOhm

Min.

500MOhm

Min.

500MOhm

Min.

500MOhm

PE resistanceMax.

0.1OhmOutput over-voltage protection

Typ.
Max.

Class of protection
Degree of protection
Over-temperature protection

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

At 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 thearea of the DIN rail mounting bracket.

30.5Vdc
32Vdc
In case of an internal DC/DC converter defect, a redundant circuit limits the
maximum output voltage. The output shuts down and automatically attempts torestart.
I
According to IEC 61140
A PE (Protective Earth) connection is required
IP 20
According to EN/IEC 60529
Included
Output shut-down with automatic restart.
Temperature sensors are installed on critical components
inside the unit and turn the unit off in safety criticalsituations, which can happen e.g. when ambient
temperature is too high, ventilation is obstructed or thederating requirements are not followed. There is nocorrelation between the operating temperature and turnoff temperature since this is dependent on input voltage,load and installation methods.
MOV (Metal Oxide
For protection values see chapter 15 (EMC).
Varistor)
DC suitable fuse
Not user replaceable slow-blow high-braking capacity fuseincluded
The leakage current which is produced by the DC/DC converter itself depends on the input
voltage ripple and need to be investigated in the final application.
For a smooth DC input voltage, the produced leakage current is less than 100µA.

Aug. 2023 / Rev. 1.1 DS-CP10.241-60-EN All parameters are typical values specified at 24V, 8.3A output, 110Vdc input,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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CP10.241-60
24V, 200W, DC/DC CONVERTER

CP-Series

19. APPROVED, FULFILLED OR TESTED STANDARDS
Railroad (Rolling Stock)

Manufacturer's Declaration
EN 50155 - Electronic Equipment Used on Rolling Stock
Altitude category: AX
Environmental category: TX
Interruption of voltage supply: S2
Supply change over: C2
Shock and vibration: Category 1, Class A and B
EMI: EN 50121-3-2
Fire Classification: HL3

IEC 61010-2-201

Manufacturer's Declaration
Electrical Equipment for Measurement, Control and Laboratory Use Particular requirements for control equipment

IEC 60068-2-60

Manufacturer's Declaration (Online Document)
Environmental Tests, Flowing Mixed Gas Corrosion Test
IEC 60068-2-60 Method 4
Test Ke - Method 4
H2S: 10ppb
NO2: 200ppb
Cl2: 10ppb
SO2: 200ppb
Test Duration: 3 weeks, this simulates a service life of 10 years.
Manufacturer's Declaration (Online Document)
Airborne Contaminants Corrosion Test
ISA-71.04 G3
Severity Level: G3 Harsh
H2S: 100ppb
NOx: 1250ppb
Cl2: 20ppb
SO2: 300ppb
Test Duration: 3 weeks, this simulates a service life of 10 years.

ISA-71.04 G3

Labs

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

Aug. 2023 / Rev. 1.1 DS-CP10.241-60-EN All parameters are typical values specified at 24V, 8.3A output, 110Vdc input,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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CP10.241-60
24V, 200W, DC/DC CONVERTER

CP-Series

20. REGULATORY PRODUCT COMPLIANCE
EU Declaration of Conformity

The CE mark indicates conformance with the- EMC directive- Low-voltage directive- RoHS directive

REACH Regulation (EU)Manufacturer's Declaration
EU regulation regarding the Registration, Evaluation, Authorisation andRestriction 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
UKCA Declaration of Conformity
Trade conformity assessment for England, Scotland and WalesThe UKCA mark indicates conformity with the UK Statutory
Instruments
2016 No.1101,
2016 No.1091,
2012 No.3032

WEEE Regulation

UKCA

Aug. 2023 / Rev. 1.1 DS-CP10.241-60-EN All parameters are typical values specified at 24V, 8.3A output, 110Vdc input,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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CP10.241-60
24V, 200W, DC/DC CONVERTER

CP-Series

21. PHYSICAL DIMENSIONS AND WEIGHT
Width
HeightDepth
WeightDIN rail
Housing material
Installation clearances
Penetration protection

39mm
124mm
117mm
The DIN rail depth must be added to the unit depth to calculate the total required installation depth.
620g
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 4mm

Fig. 21-1 Front viewAll dimensions in mm

X

X

Fig. 21-2 Side viewAll dimensions in mm

Aug. 2023 / Rev. 1.1 DS-CP10.241-60-EN All parameters are typical values specified at 24V, 8.3A output, 110Vdc input,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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CP10.241-60
24V, 200W, DC/DC CONVERTER

CP-Series

22. ACCESSORIES
22.1. ZM10.WALL - WALL/PANEL MOUNT BRACKETThis bracket is used to mount the devices on a wall/panel without utilizing the DIN rail. The bracket can be mounted without detaching
the DIN rail brackets from the power supply. PSU for illustration purpose only.
Fig. 22-1 Isometric viewFig. 22-2 Isometric viewFig. 22-4 Wall/panel mounting,Fig. 22-5 Hole pattern for wall mounting

Fig. 22-3 Isometric view

23.
24.
Fig. 22-6 Wall/panel mounting, side view

front view

Aug. 2023 / Rev. 1.1 DS-CP10.241-60-EN All parameters are typical values specified at 24V, 8.3A output, 110Vdc input,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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CP10.241-60
24V, 200W, DC/DC CONVERTER

CP-Series

24.1. ZM12.SIDE - SIDE MOUNTING BRACKETThis bracket is used to mount the power supply sideways with or without utilizing a DIN rail.
The two aluminum brackets and the black plastic slider of the unit have to be detached, so that the steel brackets canbe mounted.
For sideway DIN rail mounting, the removed aluminum brackets and the black plastic slider need to be mounted on thesteel bracket.

Fig. 22-4
Side mounting without DIN rail
brackets

Fig. 22-5
Side mounting with DIN rail
brackets

Fig. 22-6
Mounting Dimensions
Side mounting bracket

Aug. 2023 / Rev. 1.1 DS-CP10.241-60-EN All parameters are typical values specified at 24V, 8.3A output, 110Vdc input,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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CP10.241-60
24V, 200W, DC/DC CONVERTER

CP-Series

24.2. UF20.241 BUFFER MODULE
This buffer unit is a supplementary device for DC 24V power supplies. It delivers power to bridge typical mains
failures or extends the hold-up time after turn-off of the input
Power
Bufferpower. In times when the power supply provides sufficient
Load
AC
SupplyUnit(s)voltages, the buffer unit stores energy in integrated electrolytic
capacitors. In case of input voltage fault, this energy is released+
DCagain in a regulated process. One buffer module can deliver 20A
additional current.
The buffer unit does not require any control wiring. It can be added in parallel to the load circuit at any given
point. Buffer units can be added in parallel to increase the output ampacity or the hold-up time.

24.3. YR20.242 - REDUNDANCY MODULEThe YR20.242 is equipped with two input channels, which are individually decoupled by utilizing MOSFET
technology. Using MOSFETSs instead of diodes reduces the heat generation and the voltage drop between
input and output. The YR20.242 does not require an additional auxiliary voltage and is self-powered even incase of a short circuit across the output.
Due to the low power losses, the unit is very slender and only requires 32mm width on the DIN rail.
The YR20.242 can be used for n+1 and 1+1 redundancy systems.
Further information and wiring configurations can be found in chapter 25.5.

24.4. YR20.246 - REDUNDANCY MODULE WITH AUTOMATED LOAD SHARINGThe YR20.246 is equipped with two input channels, which are individually decoupled by utilizing MOSFET
technology. Using MOSFETSs instead of diodes reduces the heat generation and the voltage drop between
input and output. The YR20.246 does not require an additional auxiliary voltage and is self-powered even incase of a short circuit across the output.
Due to the low power losses, the unit is very slender and only requires 32mm width on the DIN rail.
The YR20.246 is optimized for 1+1 redundancy systems.
Compared to the YR20.242, the YR20.246 is featured with an automated load sharing between the connected
power supplies. The YR20.246 monitors the function of the redundancy circuitry and provides a signal in caseof too high of output current, which could prevent redundancy, if one power supply fails.
Further information and wiring configurations can be found in chapter 25.5.

Aug. 2023 / Rev. 1.1 DS-CP10.241-60-EN All parameters are typical values specified at 24V, 8.3A output, 110Vdc input,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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CP10.241-60
24V, 200W, DC/DC CONVERTER

CP-Series

25. APPLICATION NOTES
25.1. 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 breakerneed 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 examples show typicalvoltage dips for resistive loads:
Fig. 25-1 16.6A peak current for 50ms, typ.
(2x the nominal current)

Fig. 25-2 41.5A peak current for 5ms, typ.
(5x the nominal current).

OutputVoltage

24V

16.6A

OutputVoltage

24V

41.5A

15.5V

15.5V

OutputCurrent

0A
10ms/DIV

0A

1ms/DIV

OutputCurrent

Fig. 25-3 25A peak current for 12ms, typ.
(3x the nominal current)

24V

25A

Output Voltage
10V

14ms

Output Current

0A

10ms/DIVPeak current voltage dips

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

Typically from 24V to 15.5V
Typically from 24V to 17V
Typically from 24V to 15.5V

at 16.6A for 50ms, resistive load
at 41.5A for 2ms, resistive load
at 41.5A for 5ms, resistive load

Aug. 2023 / Rev. 1.1 DS-CP10.241-60-EN All parameters are typical values specified at 24V, 8.3A output, 110Vdc input,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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CP10.241-60
24V, 200W, DC/DC CONVERTER

CP-Series

25.2. CHARGING OF BATTERIESThe DC/DC converter can be used to charge lead-acid or maintenance free batteries. (Two 12V batteries in series)
Instructions for charging batteries:a)

Set output voltage (measured at no load and at the battery end of the cable) very precisely to the end-of-charge voltage.
End-of-charge voltage

27.8V

27.5V

27.15V

26.8V

Battery temperature

10°C

20°C

30°C

40°C

b)
c)

Use a 15A or 16A circuit breaker (or blocking diode) between the DC/DC converter and the battery.
Ensure that the output current of the DC/DC converter is below the allowed charging current of the battery.

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

e)

The return current to the power supply (battery discharge current) is typ. 3mA when the power supply is switched off (except incase a blocking diode is utilized).

25.3. SERIES OPERATION

Unit A

Input+-

DC/DC converters 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 sumof the output voltage does not exceed 150Vdc. Voltages with a potential above 60Vdc
must be installed with a protection against touching.
Avoid return voltage (e.g. from a decelerating motor or battery) which is applied to the
output terminals.

Output+Unit B

Load

Input

+

-

Keep an installation clearance of 15mm (left / right) between two power supplies and
Outputavoid installing the power supplies on top of each other. Do not use power supplies inseries in mounting orientations other than the standard mounting orientation (input terminals on bottom of the unit).
Pay attention that leakage current, EMI, inrush current will increase when using multiple power supplies.

25.4. PARALLEL USE TO INCREASE OUTPUT POWER

Unit A

Input+-

DC/DC converters 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 units,or the units can be left with the factory settings. The ambient temperature is notallowed to exceed +60°C.
If more than three units are connected in parallel, a fuse or circuit breaker with a ratingof 15A or 16A is required on each output. Alternatively, a diode or redundancy module
can also be utilized.

Output+Unit B

Load

Input

+
-

-

OutputEnergize all units at the same time. It also might be necessary to cycle the input power(turn-off for at least five seconds), if the output was in overload or short circuits and the required output current is higher than thecurrent of one unit.
Keep an installation clearance of 15mm (left / right) between two power supplies and avoid installing the power supplies on top of eachother. Do not use power supplies in parallel in mounting orientations other than the standard mounting orientation (input terminals onbottom of the unit) or in any other condition where a derating of the output current is required (e.g. altitude, above 60°C, …).
Pay attention that leakage current, EMI, inrush current will increase when using multiple power supplies.

Aug. 2023 / Rev. 1.1 DS-CP10.241-60-EN All parameters are typical values specified at 24V, 8.3A output, 110Vdc input,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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CP10.241-60
24V, 200W, DC/DC CONVERTER

CP-Series

25.5. PARALLEL USE FOR REDUNDANCY
1+1 Redundancy:
DC/DC converters 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 DC/DC converter unit fails. The simplest way is to put two DC/DC converters in parallel. Thisis called a 1+1 redundancy. In case one unit 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 power supplies from each other. This prevents that the defective
unit becomes a load for the other power supplies and the output voltage cannot be maintained any more.
Recommendations for building redundant power systems:- Use separate input fuses for each power supply.
- Monitor the individual DC/DC converter units. Therefore, use the DC-OK relay contact of the DC/DC converter.
- It is desirable to set the output voltages of all units to the same value (± 100mV) or leave it at the factory setting.
Pay attention that leakage current, EMI, inrush current will increase when using multiple DC/DC converters.
Wiring examples for 1+1 redundancy:
Fig. 25-4 Redundant power design utilizing the YR20.242 redundancy
moduleFig. 25-5 Redundant power design utilizing the YR20.246 redundancy
module with automated load sharing

FailureMonitor+ + - -

+ - + -

+ + - -

+ + - -

+ + - -

Output
24V, 8.3A

Input Input
2
1

Output
24V, 8.3A

Output
24V, 8.3A

Output
24V, 8.3A

YR20.242

DCOK

o
o

DC/DC
Converter

Redundancy
Module- +opt ional

I

+

DCOK

DC/DC
Converter

OutputInput+ - PE

o
o

o
o

DC/DC
Converter

DCOK

o
o

DC/DC
Converter

Input

Input

Input

+ - PEL N PEL N PE

2
Input

Load Share
OK
Redudnadcy
OK

o
o
o
o

YR20.246

Redundancy
ModuleLoad
Share
Warning

FailureMonitor

Output

- +
max.
8.3A
Load

max.
8.3A
Load
I

I

I

+

-

-

PE

PE

opt ional

DCOK- - ++
1Input

N+1 Redundancy:
Redundant systems for a higher power demand are usually built in a N+1 method. E.g. four DC/DC converters, each rated for 8.3A are
paralleled to build a 24.9A redundant system.
Ensure that the ambient temperature of the DC/DC converters below 60°C for n+1 redundancy applications.
Keep an installation clearance of 15mm (left / right) between two DC/DC converters and avoid installing the units on top of each other.
Do not use DC/DC converters in parallel in mounting orientations other than the standard mounting orientation or in any othercondition, where a derating of the output current is required.
Pay attention that leakage current, EMI, inrush current will increase when using multiple DC/DC converters.

Aug. 2023 / Rev. 1.1 DS-CP10.241-60-EN All parameters are typical values specified at 24V, 8.3A output, 110Vdc input,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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CP10.241-60
24V, 200W, DC/DC CONVERTER

CP-Series

25.6. USE IN A TIGHTLY SEALED ENCLOSURE
When the DC/DC converter 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 DC/DC converter.
The DC/DC converter is placed in the middle of the box, no other heat producing items are inside the box. The load is placed outside thebox.
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
180x180x165mm
Rittal Typ IP66 Box
PK 9519 100,plastic
110Vdc
24V, 6.6A; (=80%)
46.3°C
27.8°C
18.5K

Case B
180x180x165mm
Rittal Typ IP66 Box
PK 9519 100,plastic
110Vdc
24V, 8.3A; (=100%)
49.7°C
28.1°C
21.6K

Aug. 2023 / Rev. 1.1 DS-CP10.241-60-EN All parameters are typical values specified at 24V, 8.3A output, 110Vdc input,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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CP10.241-60
24V, 200W, DC/DC CONVERTER

CP-Series

25.7. MOUNTING ORIENTATIONSMounting orientations other than all terminals on the bottom require a reduction in continuous output power or a limitation in the
maximum allowed ambient temperature. The amount of reduction influences the lifetime expectancy of the DC/DC converter.
Therefore, two different derating curves for continuous operation can be found below:
Curve A1 Recommended output current.
Curve A2 Max allowed output current (results in approximately half the lifetime expectancy of A1).
Fig. 25-6
Mounting
Orientation A(Standardorientation)

Output Current

8A

OUTPUT

A1

8.3A

6

DC/DC
Converter

4
2
Ambient Temperature

0

INPUT

20
Fig. 25-7
Mounting
Orientation B(Upside down)

30

40

50

60

70°C

Output Current
8.3A

INPUT

8A

A2
A1

6

DC/DC
Convert er

4
2
Ambient Temperature

OUTPUT

020

Fig. 25-8
Mounting
Orientation C(Table-top
mounting)

30

40

50

60

70°C

Output Current
8.3A

8A

A2
A1

6
4
2

Ambient Temperature

0
20

50

60

70°C

8.3A

8A
OUTPUT

DC/DC
Convert er

A2
A1

6
4
2

Ambient Temperature

0
20

30

40

50

60

70°C

Output Current
8.3A

A2

6
INPUT

DC/DC
Convert er

8A
OUTPUT

Fig. 25-10
Mounting
Orientation E(Horizontal ccw)

40

Output Current

INPUT

Fig. 25-9
Mounting
Orientation D(Horizontal cw)

30

A1

4
2
Ambient Temperature

0
20

30

40

50

60

70°C

Aug. 2023 / Rev. 1.1 DS-CP10.241-60-EN All parameters are typical values specified at 24V, 8.3A output, 110Vdc input,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany

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