Puls Dimension CP, CP10.241-60 Series Manual

CP10.241-60

CP-Series

24V, 200W, DC/DC CONVERTER

DC/DC CONVERTER

 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

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GENERAL DESCRIPTION

The 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. Because of
these requirements, the unit is equipped with
conformal coated pc-boards.

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.

This DC/DC converter comes in a very compact housing
and requires only 39mm space on the DIN-rail due to
the high efficiency and low power losses. The high
efficiency is achieved by utilizing cutting edge
technology and other unique design techniques.

SHORT-FORM DATA

Output voltage DC 24V
Adjustment range 24 - 28V
Output current 8.3 – 7.1A Continuous, < +70°C

8.3 – 7.1A For 10 minutes, < +85°C
Input voltage DC DC 96 - 110V - 30%/ +40%
Input voltage range 67.2 – 154V
Input current DC 2.25 / 1.95A At 96 / 110Vdc
Input inrush current 2.5A pk
Efficiency 94.3 / 94.5% At 96 / 110Vdc
Losses 12.1 / 11.6W At 96 / 110Vdc
Hold-up time 34ms
Temperature range -40 to +70°C
Size (W x H x D) 39x124x117mm Without DIN-rail
Weight 620g / 1.37lb

ORDER NUMBERS

DC/DC converter

CP10.241-60

Mechanical Accessory

ZM4.WALL Wall/panel mount bracket
ZM12.SIDE Side mount bracket

MARKINGS

For details and a complete approval list see section 19.

Apr. 2018 / Rev. 1.0 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 [phone] Germany

CP10.241-60

CP-Series

24V, 200W, DC/DC CONVERTER

INDEX

Page Page

1.

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

2. Installation Requirements...................................4

3. DC-Input...............................................................5

4. AC-Input...............................................................6

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

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

7. Hold-up Time.......................................................8

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

9. Functional Diagram.............................................9

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

11. Lifetime Expectancy ..........................................11

12. MTBF ..................................................................11

13. Terminals and Wiring........................................12

14. Front Side and User Elements...........................13

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

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

17. Dielectric Strength ............................................16

18. Safety and Protection Features ........................17

19. Approvals and Declarations..............................18

20. RoHS, REACH and Other Fulfilled Standards .. 18

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

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

22.1. ZM4.WALL – Wall/Panel Mount Bracket .20

22.2. ZM12.SIDE - Side Mounting Bracket........21

22.3. UF20.241 Buffer Module .......................... 22

22.4. YR20.242 - Redundancy Module.............. 22

22.5. YR20.246 - Redundancy Module with

Automated Load Sharing ....................................22

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

23.1. Peak Current Capability ...........................23

23.2. Charging of Batteries ...............................24

23.3. Series Operation .......................................24

23.4. Parallel Use to Increase Output Power....24

23.5. Parallel Use for Redundancy ....................25

23.6. Use in a Tightly Sealed Enclosure ............26

23.7. Mounting Orientations ............................27

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.

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.

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)

110Vdc A 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.

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

Apr. 2018 / Rev. 1.0 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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2/27

CP10.241-60

CP-Series

24V, 200W, DC/DC CONVERTER

1. INTENDED USE

This device is designed for installation in an enclosure and is intended for general use such as in rolling stock for
railway applications (according to EN 50155) or in industrial control, office, communication, and instrumentation
equipment.

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

Apr. 2018 / Rev. 1.0 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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3/27

CP10.241-60

CP-Series

24V, 200W, DC/DC CONVERTER

2. INSTALLATION REQUIREMENTS

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 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.

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 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 and ground must not exceed 300Vdc continuously.
A disconnecting means shall be provided for the input of the device.
The output is electronically protected against no-load, overload and short circuit and can supply any kind of loads,

including unlimited inductive loads and capacitive loads. If capacitors with a capacitance >1.5F are connected, the unit
might charge the capacitor in an intermittent mode.

Do not apply return voltages from the load to the output terminals higher than 35V.
The device is designed for convection cooling and does not require an external fan. Do not obstruct airflow and do not

cover ventilation grid!
The device is designed for altitudes up to 6000m (19685ft). See additional requirements in the product datasheet for

use above 2000m (6560ft).
Keep the following minimum installation clearances: 40mm on top, 20mm on the bottom, 5mm left and right side.

Increase the 5mm to 15mm in case the adjacent device is a heat source. When the device is permanently loaded with
less than 50%, the 5mm can be reduced to zero.

The device is designed, tested and approved for branch circuits up to 20A without additional protection device. If an
external fuse is utilized, do not use circuit breakers smaller than 6A B- or 4A C-Characteristic to avoid a nuisance
tripping of the circuit breaker.

The maximum surrounding air temperature is +85°C (+185°F). The operational temperature is the same as the ambient
or surrounding air temperature and is defined 2cm below the device.

The device is designed to operate in areas between 5% and 95% relative humidity.
Check for correct input polarity. The device will not operate when the voltage is reversed.

WARNING

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

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

- Make sure that the wiring is correct by following all local and national codes.

- Do not modify or repair the unit.

- Do not open the unit as high voltages are present inside.

- Use caution to prevent any foreign objects from entering the housing.

- Do not use in wet locations or in areas where moisture or condensation can be expected.

- Do not touch during power-on, and immediately after power-off. Hot surfaces may cause burns.

Apr. 2018 / Rev. 1.0 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

CP-Series

24V, 200W, DC/DC CONVERTER

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 Nom. DC 96-110V -30%/+40%
Input voltage range 67-154Vdc
57-67Vdc Short term for 2s, no start at 57Vdc
Input current Typ. 2.25A At 8.3A and 96Vdc input voltage, see Fig. 3-3
Typ. 1.95A At 8.3A and 110Vdc input voltage, see Fig. 3-3
Allowed voltage between input

to earth (ground)

Max. 300Vdc Continuous, IEC 62477-1

Allowed input ripple voltage Max. 15Vpp

3Vpp

50Hz –10kHz
10kHz – 50kHz

Turn-on voltage Typ. 64.5Vdc Steady-state value, temperature independent, see Fig.

3-1

Shut-down voltage Typ. 62.5Vdc Steady-state value, temperature independent, see Fig.

3-1
Start-up delay Typ. 700ms At 96Vdc input, see Fig. 3-2
Typ. 600ms At 110Vdc input, see Fig. 3-2
Rise time Typ. 45ms At 8.3A constant current load, 0mF load capacitance
Typ. 90ms At 8.3A constant current load, 8mF load capacitance,

see Fig. 3-2

Reverse input polarity protection Included 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 .

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

Turn-on

67V

Rated

input range

max.

500ms

V

IN

P

OUT

5/27

375Vdc154V

Shut-down

Start-up Rise

delay Time

Overshoot

- 5%

Output
Voltage

Input
Voltage

Fig. 3-3 Input current vs. output load at 24V

8

01234

0

0.5

1.0

1.5

2.5

Output Current

Input Current, typ.

567

9A

2.0

3A

(a) 96Vdc,
(b) 110Vdc

(a)
(b)

Apr. 2018 / Rev. 1.0 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 [phone] Germany

CP10.241-60

CP-Series

24V, 200W, DC/DC CONVERTER

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-on of the input voltage.

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

DC 96V DC 110V

Inrush current Max. 8A

peak

8A

peak

Temperature independent

Typ. 2.5A

peak

2.5A

peak

Temperature independent

Inrush energy Max. 0.1A²s 0.1A²s Temperature independent

Fig. 5-1 Typical input inrush current behaviour at

nominal load and 25°C ambient

50ms/DIV

Input
current

0.5A/DIV

Input
voltage
20V/DIV

Output voltage 5V/DIV

Apr. 2018 / Rev. 1.0 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

CP-Series

24V, 200W, DC/DC CONVERTER

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 an intermittent mode.

Output voltage Nom. 24V
Adjustment range Min. 24-28V Guaranteed

Max. 30V This is the maximum output voltage which can occur

at the clockwise end position of the potentiometer
due to tolerances. It is not a guaranteed value which

can be achieved.
Factory setting Typ. 24.1V ±0.2% At full load, cold unit
Line regulation Max. 10mV Between 67 and 154Vdc
Load regulation Max. 100mV Between 0A and 8.3A, static value
Ripple and noise voltage Max. 50mVpp Bandwidth 20Hz to 20MHz, 50Ohm

Output current

Nom. 8.3A At 24V and an ambient temperature below 70°C or at

+85°C for maximum 10 minutes.

Nom. 7.1A At 28V and an ambient temperature below 70°C or at

+85°C for maximum 10 minutes.
Fuse breaking current

1)

Typ. 30A Up to 12ms once every five seconds, see Fig. 6-2.

Overload protection Included Electronically protected against overload, no-load and

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

noise may occur.

Overload behaviour Continuous current Output voltage above 13Vdc, see Fig. 6-1
Intermitted current2) Output voltage below 13Vdc, see Fig. 6-1

Overload/ short-circuit current Max. 10.6A Continuous current, see Fig. 6-1

Typ. 11.5A Intermitted current peak value for typ. 2s

Load impedance 50mOhm, see Fig. 6-3

Discharge current of output capacitors is not included.

Max. 4.3A Intermitted current average value (R.M.S.)

Load impedance 50mOhm, see Fig. 6-3
Output capacitance Typ. 4 400μF Included inside the power supply
Back-feeding loads

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

malfunctioning when a load feeds back voltage to the

power supply. It does not matter whether the power

supply is on or off. The absorbing energy can be

calculated according to the built-in large sized output

capacitor.

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 23.1 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 for approx. 18s before a new start attempt is automatically performed. This cycle is repeated as long as the overload
exists. If the overload has been cleared, the device will operate normally. see Fig. 6-2.

Apr. 2018 / Rev. 1.0 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

CP-Series

24V, 200W, DC/DC CONVERTER

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

typ.

Fig. 6-2 Dynamic output current capability,

typ.

Output Voltage

0

01

4

8

12

28V

16

20

24

0

12A62 4 8

Adjustment Range

Output Current

A

B

A: continuous current
B: intermitted current

Output Voltage

(dynamic behavior, < 12ms)

0

0

4

8

12

28V

16

20

24

50A2010 30 40515253545

Adjustment

Range

Output Current

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

PLUS

mode, typ.

Output
Current

0

11.5A

18s

18s

18s

2s

2s

2s

t

Short -circuit

Normal

operation

Normal

operation

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.

DC 96V DC 110V

Hold-up Time Typ. 72ms 72ms At 4.15A, see Fig. 7-1
Min. 54ms 54ms At 4.15A, see Fig. 7-1
Typ. 34ms 34ms At 8.3A, see Fig. 7-1
Min. 26ms 26ms At 8.3A, see Fig. 7-1

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

8/27

0

15

30

45

60

75ms

70 90 110 130 150Vdc

Hold-up Time

Input Voltage

at 8.3A, typ.

at 4.15A, min.

at 4.15A, typ.

at 8.3A, min.

- 5%

Output
Voltage

Input
Voltage

Hold-up Time

Apr. 2018 / Rev. 1.0 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

CP-Series

24V, 200W, DC/DC CONVERTER

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 1V
Contact ratings Maximal 60Vdc 0.3A, 30Vdc 1A, 30Vac 0.5A, resistive load
Minimal permissible load: 1mA at 5Vdc
Isolation voltage See dielectric strength table in section 18.

Fig. 8-1 DC-ok relay contact behavior

100ms

0.9* V

ADJ

<

1ms

10%

open

V

OUT

= V

ADJ

openclosed closed

>

1ms

9. FUNCTIONAL DIAGRAM

Fig. 9-1 Functional diagram

+

+

-

-

DC-ok
contact

Output

Over-

Boost

Converter

(pre

conditioning)

Voltage

Protection

Output

Voltage

Regulator

Output

Filter

9/27

DC-ok
Relay

Output

Voltage

Monitor

Output

Power

Manager

Temper-

ature
Shut­down

DC-ok
LED

Input Fuse
Input Filter
Active Inrush
Limiter

V

OUT

Power

Converter

+

-

Reverse Polarity
and Back-feeding
Protection

-

Apr. 2018 / Rev. 1.0 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

CP-Series

24V, 200W, DC/DC CONVERTER

10. EFFICIENCY AND POWER LOSSES

DC 96V DC 110V

Efficiency Typ. 94.3% 94.5% At 24V, 8.3A
Average efficiency*) Typ. 93.1% 93.5% 25% at 2.1A, 25% at 4.15A,

25% at 6.2A. 25% at 8.3A
Power losses Typ. 2.8W 2.6W At 24V, 0A
Typ. 7.2W 6.8W At 24V, 4.2A (= 50% load)
Typ. 12.1W 11.6W 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 the time.

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

typ.

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

typ.

Efficiency

123456789A

87

88

89

90

91

92

Output Current

93

94

95%

(a) 96Vdc,
(b) 110Vdc

(a)

(b)

Power Losses

01234567 9A

0

2

8

10

Output Current

12W

8

4

6

(a) 96Vdc,
(b) 110Vdc

(a)
(b)

Apr. 2018 / Rev. 1.0 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

CP-Series

24V, 200W, DC/DC CONVERTER

11. 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.

DC 96V DC 110V

Lifetime expectancy 171 000h 194 000h At 24V, 4.2A and 40°C
485 000h 549 000h At 24V, 4.2A and 25°C
112 000h 119 000h At 24V, 8.3A and 40°C
316 000h 336 000h 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 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.

DC 96V DC 110V

MTBF SN 29500, IEC 61709 758 000h 775 000h At 24V, 8.3A and 40°C
1 337 000h 1 362 000h At 24V, 8.3A and 25°C
MTBF MIL HDBK 217F 291 000h 292 000h At 24V, 8.3A and 40°C, Ground Benign GB40
404 000h 406 000h At 24V, 8.3A and 25°C, Ground Benign GB25
72 000h 72 000h At 24V, 8.3A and 40°C, Ground Fixed GF40
93 000h 94 000h At 24V, 8.3A and 25°C, Ground Fixed GF25

Apr. 2018 / Rev. 1.0 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

CP-Series

24V, 200W, DC/DC CONVERTER

13. TERMINALS AND WIRING

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

Input and output DC-OK-Signal

Type

Quick-connect spring-clamp terminals Push-in terminals
Solid wire Max. 6mm2 Max. 1.5mm2
Stranded wire Max. 4mm2 Max. 1.5mm2
American Wire Gauge AWG 20-10 Max. AWG 28-16
Max. wire diameter 2.8mm (including ferrules) 1.6mm (including ferrules)
Wire stripping length 10mm / 0.4inch 7mm / 0.28inch
Screwdriver Not required 3mm slotted to open the spring
Recommended tightening torque Not applicable 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.

Fig. 13-1 Daisy chaining of outputs Fig. 13-2 Using distribution terminals

DC/DC

Converter

+ +

- -

Input

Output

Load

+

-

max 25A!

DC/DC

Converter

+ +

- -

Input

Output

Load

+

-

Distribution
Terminals

DC/DC

Converter

+ +

- -

Input

Output

DC/DC

Converter

+ +

- -

Input

Output

Apr. 2018 / Rev. 1.0 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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12/27

CP10.241-60

CP-Series

24V, 200W, DC/DC CONVERTER

14. FRONT SIDE AND USER ELEMENTS

Fig. 14-1 Front side

A

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.

Apr. 2018 / Rev. 1.0 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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13/27

CP10.241-60

CP-Series

24V, 200W, DC/DC CONVERTER

15. EMC

The EMC behavior of the DC/DC converter is designed for rolling stock railway applications and for applications in
industrial environments.

EMC Immunity

According to generic standards EN 61000-6-1 and EN 61000-6-2 and according to the
railway standard EN 50121-3-2.

Electrostatic discharge EN 61000-4-2 Contact discharge

Air discharge

8kV
15kV

Criterion A
Criterion A

Electromagnetic RF field EN 61000-4-3 80MHz-2.7GHz

5.1-6GHz

20V/m
10V/m

Criterion A
Criterion A

Fast transients (Burst) EN 61000-4-4 Input lines

Output lines
DC-OK signal (coupling clamp)

4kV
2kV
2kV

Criterion A
Criterion A
Criterion A

Surge voltage on input EN 61000-4-5 + Æ -

+ Æ PE, - Æ PE

2kV
4kV

Criterion A
Criterion A

Surge voltage on output EN 61000-4-5 + Æ -

+ / - Æ PE

1kV
2kV

Criterion A

Criterion A
Surge voltage on DC-OK EN 61000-4-5 DC-OK signal Æ PE 1kV Criterion A
Conducted disturbance EN 61000-4-6 0.15-80MHz 10V Criterion A
Power – Frequency magnetic

field

EN 61000-4-8 16.7Hz, 50Hz

0Hz

100A/m
300A/m

Criterion A

Criterion A
Pulsed magnetic field EN 61000-4-9 300A/m Criterion 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

According to the generic standard EN 61000-6-4 and according to railway standard EN
50121-3-2.

Conducted emission
input lines

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
output lines

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
Radiated emission EN 55011, EN 55022, EN 50121-3-2 Class 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 100kHz Fixed frequency
Main converter 110kHz to 140kHz Input voltage and output load dependent
Auxiliary converter 60kHz Fixed frequency

Apr. 2018 / Rev. 1.0 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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14/27

CP10.241-60

CP-Series

24V, 200W, DC/DC CONVERTER

16. ENVIRONMENT

Operational temperature -40°C to +70°C (-40°F to 158°F) The operational temperature is the ambient or

surrounding temperature and is defined as the

air temperature 2cm below the device.
+70°C to +85°C (185°F to 185°F) For maximal 10 minutes every hour
Storage temperature -40°C to +85°C (-40°F to 185°F) For storage and transportation
Output de-rating 12W/1000m or 5°C/1000m

7.5W/-5kPa or 3°C/-5kPa

For altitudes >2000m (6560ft), see Fig. 16-2

For atmospheric pressures <80kPa, see Fig. 16-2
The de-rating is not hardware controlled. The customer has to take care by himself to

stay below the de-rated current limits in order not to overload the unit.

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

Do not energize while condensation is present.
Atmospheric pressure 110-47kPa See Fig. 16-2 for details
Altitude Up to 6000m (19 685ft) See Fig. 16-2 for details
Over-voltage category 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 6000m and atmospheric pressures

from 80 to 47kPa
Degree of pollution 2 According to IEC 62477-1, not conductive
Vibration sinusoidal 2-17.8Hz: ±1.6mm; 17.8-500Hz: 2g

***)

2 hours / axis

According to IEC 60068-2-6; DC/DC converter in

operation
Vibration broadband 1.01grms for 10 minutes; 5-150Hz

***)

According to IEC 60068-2-64, DC/DC converter

in operation, 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
Shock 30g 6ms, 20g 11ms, 50g 30ms

***)

3 bumps / direction, 18 bumps in total

According to IEC 60068-2-27; DC/DC converter

in operation

50g 30ms

***)

3 bumps / direction, 18 bumps in total

According to IEC 60068-2-27, DC/DC converter

not in 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.

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

LABS criteria and is suitable for use in paint shops.

Corrosive gases Tested according to ISA-71.04-1985, Severity Level G3 and IEC 60068-2-60 Test Ke

Method 4 for a service life of minimum 10years in these environments.

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

short circuit.

Apr. 2018 / Rev. 1.0 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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15/27

CP10.241-60

CP-Series

24V, 200W, DC/DC CONVERTER

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

24V output voltage

Fig. 16-2 Output current vs. altitude at 24V

output voltage

Allowed Output Current

0

-40 0 20 40

85°C

2

4

6

8

8.3A

10A

60-20 70

A B

Ambient Temperature

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

2A

4A

6A

8A

10A

Allowable Output Current

B

C

A

.

.

.

T

a

m

b

<

7

0

°

C

B

.

.

.

T

a

m

b

<

6

0

°

C

C

.

.

.

T

a

m

b

<

5

0

°

C

A

2000m 4000m 6000m

Altitude
AP

*)

80kPa 62kPa 47kPa110kPa

0m

*) Atmospheric pressure

8.3A

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 2s down). Connect all input-terminals together as well as all output poles before
conducting the test. When testing, set the cut-off current settings to the value in the table below.

Fig. 17-1 Dielectric strength

A B C D

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

16/27

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

Field test 5s 2000Vac 2000Vac 500Vac 500Vac

Cut-off current setting > 15mA > 15mA > 50mA > 5mA

AD

C

B

B

*)

-

+

Input DC-ok

Earth, PE

Output

+

-

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

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 DC-OK pins and the output pins together when performing the test.

Apr. 2018 / Rev. 1.0 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 [phone] Germany

CP10.241-60

CP-Series

24V, 200W, DC/DC CONVERTER

18. 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. 30.5Vdc
Max. 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 to restart.

Class of protection I According to IEC 61140

A PE (Protective Earth) connection is required
Degree of protection IP 20 According to EN/IEC 60529
Over-temperature protection Included Output 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 de-rating requirements are not

followed. There is no correlation between the

operating temperature and turn-off temperature

since this is dependent on input voltage, load and

installation methods.
Input transient protection MOV (Metal

Oxide Varistor)

For protection values see chapter 15 (EMC).

Internal input fuse DC suitable fuse

included

Not user replaceable slow-blow high-braking

capacity fuse
Touch current (leakage current) 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.

Apr. 2018 / Rev. 1.0 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

CP-Series

24V, 200W, DC/DC CONVERTER

19. APPROVALS AND DECLARATIONS

EC Declaration of Conformity

The CE mark indicates conformance with the

- EMC directive and the

- Low-voltage directive

Railway applications - Electronic
equipment used on rolling stock.

EN 50155:2007

The manufacturer’s declaration indicate conformance with
the following characteristics:

- Altitude category: AX (EN 50125-1 § 4.2.1)

- Environmental category: TX (EN 50155 § 4.1.2)

- Interruption of voltage supply: S2 (EN 50155 § 5.1.1.2)

- Supply change over: C2 (EN 50155 § 5.1.3)

- Shock and vibration: Category 1, Class A and B (EN 61373)

- EMI: EN 50121-3-2

- Fire Classification: HL3 (EN 45545-2)

EAC TR Registration

Registration for the Eurasian Customs Union market
(Russia, Kazakhstan, Belarus)

20. ROHS, REACH AND OTHER FULFILLED STANDARDS

RoHS Directive

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

REACH Directive

Directive 1907/2006/EU of the European Parliament and the
Council of June 1

st

, 2007 regarding the Registration,
Evaluation, Authorisation and Restriction of Chemicals
(REACH)

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

Safety Isolating

Transformer

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

Apr. 2018 / Rev. 1.0 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

CP-Series

24V, 200W, DC/DC CONVERTER

21. PHYSICAL DIMENSIONS AND WEIGHT

Width 39mm 1.54’’
Height 124mm 4.88’’
Depth 117mm 4.61’’

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

installation depth.
Weight 620g / 1.37lb
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 4mm

Fig. 21-1 Front view Fig. 21-2 Side view

All dimensions in mm

All dimensions in mm

Apr. 2018 / Rev. 1.0 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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19/27

CP10.241-60

CP-Series

24V, 200W, DC/DC CONVERTER

22. ACCESSORIES

22.1. ZM4.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 view

Fig. 22-5 Hole pattern for wall

mounting

Fig. 22-6 Wall/panel mounting,

side view

Apr. 2018 / Rev. 1.0 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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20/27

CP10.241-60

CP-Series

24V, 200W, DC/DC CONVERTER

22.2. ZM12.SIDE - SIDE MOUNTING BRACKET

This 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 can be mounted.
For sideway DIN-rail mounting, the removed aluminum brackets and the black plastic slider need to be

mounted on the steel bracket.

Fig. 22-7

Side mounting without DIN-

rail brackets

Fig. 22-8

Side mounting with DIN-rail

brackets

Fig. 22-9

Mounting Dimensions

Side mounting bracket

Apr. 2018 / Rev. 1.0 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

CP-Series

24V, 200W, DC/DC CONVERTER

22.3. 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. In times when the power supply
provides sufficient voltages, the buffer unit stores
energy in integrated electrolytic capacitors. In case of
input voltage fault, this energy is released again in a
regulated process. One buffer module can deliver 20A
additional current.

DC

Buffer

Unit(s)

Power

Supply

Load

AC

+

-

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.

22.4. YR20.242 - REDUNDANCY MODULE

The 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 in case 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 23.5.

22.5. YR20.246 - REDUNDANCY MODULE WITH AUTOMATED LOAD SHARING

The 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 in case of a short circuit across the output.

22/27

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 case of too high of output current, which could prevent redundancy, if one

power supply fails.
Further information and wiring configurations can be found in chapter 23.5.

Apr. 2018 / Rev. 1.0 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 [phone] Germany

CP10.241-60

CP-Series

24V, 200W, DC/DC CONVERTER

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 examples show typical voltage dips for resistive loads:

Fig. 23-1 16.6A peak current for 50ms, typ.

(2x the nominal current)

Fig. 23-2 41.5A peak current for 5ms, typ.

(5x the nominal current).

Output
Voltage

Output
Voltage

24V

24V

23/27

10ms/DIV

Output
Current

0A

16.6A

15.5V

Output
Current

1ms/DIV0A

41.5A

15.5V

Fig. 23-3 25A peak current for 12ms, typ.

(3x the nominal current)

24V

10ms/DIV

Output Voltage

Output Current

0A

14ms

25A

10V

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

Peak current voltage dips Typically from 24V to 15.5V at 16.6A for 50ms, resistive load
Typically from 24V to 17V at 41.5A for 2ms, resistive load
Typically from 24V to 15.5V at 41.5A for 5ms, resistive load

Apr. 2018 / Rev. 1.0 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

CP-Series

24V, 200W, DC/DC CONVERTER

23.2. CHARGING OF BATTERIES

The 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) Use a 15A or 16A circuit breaker (or blocking diode) between the DC/DC converter and the battery.
c) 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 in case a blocking diode is utilized).

Unit A

Input

Output

Unit B

-

+

-

+

Load

+

-

Input

Output

23.3. SERIES OPERATION

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 sum of the output voltage does not exceed 150Vdc. Voltages
with a potential above 60Vdc must be installed with a protection against
touching.

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

Keep an installation clearance of 15mm (left / right) between two power
supplies and avoid installing the power supplies on top of each other. Do not use power supplies in series in mounting
orientations other than the standard mounting orientation (inp ut terminals on bottom of the unit).

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

Unit A

Unit B

-

+

-

+

Load

+

-

Input

Output

Input

Output

23.4. PARALLEL USE TO INCREASE OUTPUT POWER

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 not allowed to exceed +60°C.

If more than three units are connected in parallel, a fuse or circuit breaker
with a rating of 15A or 16A is required on each output. Alternatively, a
diode or redundancy module can also be utilized.

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

Keep an installation clearance of 15mm (left / right) between two power supplies and avoid installing the power
supplies on top of each other. Do not use power supplies in parallel in mounting orientations other than the standard
mounting orientation (input terminals on bottom of the unit) or in any other condition where a derating of the
output current is required (e.g. altitude, above 60°C, …).

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

Apr. 2018 / Rev. 1.0 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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24/27

CP10.241-60

CP-Series

24V, 200W, DC/DC CONVERTER

23.5. 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. This is 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. 23-4 Redundant power design utilizing the

YR20.242 redundancy module

Fig. 23-5 Redundant power design utilizing the YR20.246

redundancy module with automated load sharing

25/27

+

-

PE

max.

8.3A
Load

Failure

Monitor

YR20.242

Redundancy
Module

Output

Input

1

Input

2

+ +

- -

+

-

I

optional

DC/DC
Converter

24V, 8.3A

DC­OK

++

--

PE

Output

Input

o

o

+

-

I

DC/DC
Converter

24V, 8.3A

DC­OK

++

--

PE

Output

Input

o

o

+

-

max.

8.3A
Load

Load

Share

Warning

I

DC/DC
Converter

24V, 8.3A

++

--

LNPE

Output

Input

DC­OK

o

o

I

optional

YR20.246

Redundancy
Module

Output

1
Input

2

Input

++

--

+

-

Load Share

OK

o

o

Redudnadcy

OK

o

o

Failure

Monitor

DC/DC
Converter

24V, 8.3A

++

--

LNPE

Output

Input

DC­OK

o

o

+

-

PE

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 other condition, 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.

Apr. 2018 / Rev. 1.0 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 [phone] Germany

CP10.241-60

CP-Series

24V, 200W, DC/DC CONVERTER

23.6. 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 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 180x180x165mm

Rittal Typ IP66 Box
PK 9519 100,
plastic

180x180x165mm
Rittal Typ IP66 Box
PK 9519 100,

plastic
Input voltage 110Vdc 110Vdc
Load

24V, 6.6A; (=80%) 24V, 8.3A; (=100%)
Temperature inside the box 46.3°C 49.7°C
Temperature outside the box 27.8°C 28.1°C
Temperature rise 18.5K 21.6K

Apr. 2018 / Rev. 1.0 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 [phone] Germany

26/27

CP10.241-60

CP-Series

24V, 200W, DC/DC CONVERTER

Apr. 2018 / Rev. 1.0 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 [phone] Germany

23.7. MOUNTING ORIENTATIONS

Mounting orientations other than all terminals on the bottom require a reduction in continuous output power or a
limitation in the maximum allowed ambient temperature. The amount of reduction influences the lifetime expectancy
of the 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. 23-6
Mounting
Orientation A

(Standard
orientation)

DC/DC

Converter

OUTPUT

Output Current

0

20 30 40 50

70°C

2

4

6

8A

INPUT

60

A

1

Ambient Temperature

8.3A

Fig. 23-7

Mounting
Orientation B

(Upside down)

DC/DC

Converter

27/27

OUTPUT

INPUT

Output Current

0

20 30 40 50

70°C

2

4

6

8A

60

A

2

Ambient Temperature

A

1

8.3A

Fig. 23-8

Mounting
Orientation C

(Table-top
mounting)

Output Current

0

20 30 40 50

70°C

2

4

6

8A

60

Ambient Temperature

A

1

A

2

8.3A

Fig. 23-9

Mounting
Orientation D

(Horizontal cw)

DC/DC

Converter

OUTPUT

INPUT

Output Current

0

20 30 40 50

70°C

2

4

6

8A

60

Ambient Temperature

A

1

A

2

8.3A

Fig. 23-10

Mounting
Orientation E

(Horizontal ccw)

DC/DC

Converter

OUTPUT

INPUT

Output Current

0

20 30 40 50

70°C

2

4

6

8A

60

Ambient Temperature

A

1

A

2

8.3A