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CD10.242

Product catalog summary

Overview: The CD10.242 is a high-efficiency, DIN rail mountable DC/DC converter from the DIMENSION series. It converts a 48V DC input to a 24V DC output with a power rating of 240W and an efficiency of 94%. The compact device measures 42mm in width and includes features such as PowerBoost, soft-start, and reverse input polarity protection.

Specifications:

Input Voltage: 48V DC ±25%
Output Voltage: 24V DC nominal, adjustable between 24-28V
Output Current: 10A at up to +60°C ambient, derating to 6.5A at +70°C
Efficiency: 94% at 24V, 10A
Temperature Range: -25°C to +70°C
Size: 42x124x117mm
Weight: 520g

Key Features:

20% output power reserves (PowerBoost) for continuous use up to +45°C
Soft-start function to minimize inrush current
DC OK relay contact for status indication
Parallel use capability for increased power needs
High immunity to transients and low electromagnetic emission

Installation Instructions:

Device must be installed in an enclosure by qualified personnel.
Ensure correct wiring and use appropriate copper cables for different ambient temperatures.
Maintain specified clearances for proper ventilation and cooling.
Device is designed for pollution degree 2 areas and should not be used in wet locations.

Input and Output Characteristics:

Input: Can be powered from batteries or similar DC sources, with a nominal input range of 36-60V DC.
Output: Provides a stabilized and isolated 24V DC output, with a PowerBoost capability of 12A up to +45°C.

Safety and Compliance:

Complies with UL 61010-2-201 standards.
Designed for Class of Protection I equipment with a proper PE connection.
Tested for branch circuits up to 50A without additional protection devices.

Additional Information: The device includes a soft-start feature to gradually increase the output current, reducing the risk of high input current surges. It is suitable for use in industrial control, process control, and communication equipment, but not in life-threatening applications without additional safety measures.

Output Characteristics: The nominal output current is 10A at 24V and up to 60°C, with derating required above 60°C. PowerBoost allows for a nominal current of 12A at 24V up to 45°C. The unit can handle back-feeding loads up to 35V without malfunction.

Hold-Up Time: The converter includes a bulk capacitor for hold-up time, maintaining output voltage during input voltage dips. Typical hold-up time is 14ms at 48Vdc input and 24V, 5A output.

DC OK Relay Contact: This feature monitors the output voltage, closing the contact at 21V and opening below this threshold. The contact ratings are up to 60Vdc 0.3A.

Efficiency and Power Losses: The converter achieves a typical efficiency of 94.0% at 24V, 10A, with power losses of 15.4W at full load. Average efficiency is 93.8% under typical application conditions.

Functional Diagram: The converter includes input/output filters, a voltage regulator, reverse polarity protection, and a DC OK LED.

Terminals and Wiring: Terminals are IP20 finger-safe, suitable for field and factory wiring, with specific wire gauge and torque recommendations. Daisy chaining is allowed with current limitations.

Lifetime Expectancy and MTBF: Lifetime expectancy varies with load and temperature, reaching up to 788,000 hours at 24V, 5A, and 25°C. MTBF is calculated at 765,000 hours at 24V, 10A, and 40°C.

EMC Compliance: The device meets various EMC standards for industrial and residential environments, with specific immunity and emission criteria.

Environmental Conditions: Operational temperature ranges from -25°C to +70°C, with storage temperatures from -40°C to +85°C. Derating is required for high temperatures and altitudes.

Safety and Protection Features: The converter features a minimum isolation resistance of 500MOhm and a PE resistance of max 0.1Ohm. It includes output over-voltage protection and an internal input fuse. The class of protection is I, with a degree of protection rated at IP 20.

Dielectric Strength: The output is insulated from the input by double or reinforced insulation. Type and routine tests are conducted by the manufacturer, with field tests recommended to ensure safety.

Standards and Compliance: The product complies with UL and IEC standards for electrical equipment. It meets EU directives for EMC, RoHS, and REACH, and is registered under the WEEE regulation.

Physical Dimensions and Weight: The converter measures 42mm in width, 124mm in height, and 117mm in depth, with a weight of 520g. It is designed for use with 35mm DIN rails.

Accessories: Various mounting brackets are available, including wall/panel and side mount options. A buffer module and redundancy module are also offered to enhance functionality.

Application Notes: The converter can deliver peak currents for short durations, aiding in starting high-demand loads. It supports the use of output circuit breakers and can charge batteries under specific conditions. Series operation is possible for higher output voltages.

Specifications and Installation Guidelines: The output voltage of series-connected units must not exceed 150Vdc. Voltages above 60Vdc require protection against accidental contact. Avoid return voltage from sources like decelerating motors or batteries. Maintain a 15mm clearance between power supplies and avoid stacking them. Only use the standard mounting orientation. EMI and inrush current increase with multiple devices.

Parallel Use to Increase Output Power: Devices can be paralleled to increase output power. Adjust output voltages to the same value (±100mV) in "Single Use" mode or use factory settings. Switch to "Parallel Use" mode for load sharing. Ambient temperature must not exceed +60°C. For more than three devices in parallel, use a diode, fuse, or circuit breaker rated at 15A or 16A on each output. Maintain a 15mm clearance between devices and avoid non-standard mounting orientations.

Parallel Use for Redundancy: 1+1 Redundancy: Use two devices in parallel for redundancy, requiring a redundancy module to decouple devices. Allows ambient temperatures up to +70°C. N+1 Redundancy: For higher power demands, use N+1 method. Ambient temperature must not exceed +45°C. Recommendations include using separate input fuses and supply systems for each device.

Use in a Tightly Sealed Enclosure: The internal temperature of a sealed enclosure will be higher than the external temperature. Reference measurements show temperature rises of 24.4K and 31.4K for different loads.

Mounting Orientations: Non-standard mounting orientations require reduced output power or limited ambient temperature. Standard orientation is input terminals at the bottom and output at the top. Graphs indicate allowed output currents for various mounting orientations and ambient temperatures.

Catalog excerpts

□ionerusionj CD-Series CD10.242DC/DC Converter 48V/24V, 10A, 240WDC/DC Converter ■ 48V input voltage ■ Isolated 24V output voltage ■ 20% output power reserves (PowerBoost) ■ Full power between -25°C and +60°C ■ Minimal inrush current surge ■ Reverse input polarity protection ■ Parallel use for high power needs The CD10.242 is a DIN rail mountable DC/DC converter of the highly reliable DIMENSION series. It provides a floating, stabilized and galvanically separated SELV/PELV output voltage of 24Vdc with 48Vdc on the input. The efficiency of 94% and a slim design are cost- and space-saving. The devices also offer PowerBoost: Power reserves of 20%, which may even be used continuously at temperatures up to +45°C. For even higher power needs, multiple devices can be connected in parallel. At any time, a DC OK LED and a signal contact are informing about the status of the device. High immunity to transients and power surges as well as low electromagnetic emission makes this DC/DC converter suitable for nearly every situation. Output voltage DC 24V Nominal Adjustment range 24 - 28V Factory setting 24.1V Output current 10.0 - 8.6A Up to +60°C ambient Derate linearly between +60°C and +70°C Linear decrease to nominal power between +45°C and +60°C Input voltage DC 48V ±25% Input inrush current 9Apeak At 40°C, cold start Size (W x H x D) 42x124x117mm Without DIN rail Accessories ZM10.WALL Wall/panel mount bracket ZM12.SIDE Side mount bracket For details and the complete approval list, see chapter 19.

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Dlfinerusioru CD-Series_DC/DC Converter 48V/24V, 10A, 240W | 22.1. ZM10.Wall - Wall/Panel Mount Bracket .. 21 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...

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Dlfinerusioru CD-Series_DC/DC Converter 48V/24V, 10A, 240W | This device is designed for installation in an enclosure and is intended for commercial use, such as in industrial control, process control, monitoring, measurement, Audio/Video, information or communication equipment or the like. Do not use this device in equipment, where malfunctioning may cause severe personal injury or threaten human life without additional appropriate safety devices, that are suited for the end-application. If this device is used in a manner outside of its specification, the protection provided by the device may...

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The device is designed, tested and approved for branch circuits up to 50A without additional protection device. If an external fuse is utilized, do not use circuit breakers smaller than 16A B- or C-Characteristic to avoid a nuisance tripping of the circuit breaker. The maximum surrounding air temperature is +70°C. The operational temperature is the same as the ambient or surrounding air temperature and is defined 2cm below the device. The device is designed to operate in areas between 5% and 95% relative humidity. June 2025 / Rev. 1.2 DS-CD10.242-EN All values are typical figures specified at...

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Dlfinerusioru CD-Series_DC/DC Converter 48V/24V, 10A, 240W | The input can be powered from batteries or similar DC sources and must be a PELV or SELV source or an "Isolated Secondary Circuit" in order to maintain a SELV or PELV output. Check for correct input polarity. The device will not operate when the voltage is reversed. Allowed voltage between input max. 60Vdc or According to IEC 62477-1 Allowed input ripple voltage max. 10Vpp In the frequency range from 47 to 500Hz, the momentary input voltage must always be within the specified limits. Turn-on voltage typ. 35Vdc Steady-state value, see...

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Requirements for the Supplying Source In certain circumstances, the input filter of the DC/DC converter can show a resonant effect which is caused by the supplying network. Especially when additional external input filters are utilized, a superimposed AC voltage can be generated on the input terminals of the DC/DC converter which might cause a malfunction of the unit. Therefore, additional input filters are not recommended. To avoid the resonant effects, the minimal resistance of the supplying network which depends on the inductance of the input network, shall be above the boundary curve in Fig....

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Dlfinerusioru CD-Series_DC/DC Converter 48V/24V, 10A, 240W | An active inrush limitation circuit (inrush limiting NTC resistor which is bypassed by a MOSFET) 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. 9Apeak At 40°C ambient, cold start 8Apeak At 40°C ambient, cold start 7Apeak At 25°C ambient, cold start 1A2s At 40°C ambient, cold start 24V, 10A, constant current load 25°C After the DC/DC converter is turned on, the internal output current rises slowly to its...

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Dlfinerusioru CD-Series_DC/DC Converter 48V/24V, 10A, 240W | The output provides a SELV/PELV rated voltage, which is galvanically isolated from the input voltage and is designed to supply any kind of loads, including unlimited capacitive and inductive loads. The output is electronically protected against overload, no-load and short-circuits. In case of a protection event, audible noise may occur. Output voltage Adjustment range Factory setting Line regulation Load regulation Ripple and noise voltage Output current max. 30V This is the maximum output voltage which can occur at the clockwise end...

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Dlfinerusioru CD-Series_DC/DC Converter 48V/24V, 10A, 240W | The input side of the DC/DC converter is equipped with a bulk capacitor which keeps the output voltage alive for a certain period of time when the input voltage dips or is removed. The bulk capacitor can be discharged by loading the DC/DC converter on the output side or through a load which is parallel to the input. There is no protection in the DC/DC converter which prevents current from flowing back to the input terminals. If prevention is needed, an external diode should be used. At no load, the hold-up time can be up to several...

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CD10.242

CD10.242

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