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Features

◆Ultra-wide 12:1 input voltage range: 14-160VDC

◆Efficiency as high as 84%

◆Reinforced insulation, isolation voltage 3000VAC

◆Operating temperature range:-40℃to+70℃

◆Input under-voltage protection, output over-voltage, over-current, short-circuit protection

◆International standard pin method

◆Designed to meet EN50155 and AREMA standards

◆ Designed to meet IEC62368, UL62368, CSA62368, EN62368 standards Designed to meet EN45545 fire protection standards

◆Three-year warranty period

CFDMU10-110S series is a high-performance product designed for the railway power supply field. The output power can reach 10W. It has a 14-160VDC wide voltage input and is compatible with nominal Input of six voltage ranges: 24V, 36V, 48V, 72V, 96V, 110V and meets the voltage fluctuation requirements of the EN 50155 standard, reinforced insulation 3000VAC /2800VAC The high insulation ensures the isolation safety of the system even in high-altitude applications of 5000m. It integrates multiple protection functions to maximize the safety and reliability of the system. It also has remote control, output voltage adjustment and other functions, perfectly matching the line loss and special voltage requirements of the application;

It is widely used in on-board switches, train control systems, traction control systems and other related on-board equipment.

Professional Guide: DCDC Railway Power Module – Selection, FAQs and Troubleshooting

H1: What is DCDC railway power module? Provide a stable power core for your railway applications

DCDC railway power module is a power conversion device specially designed for harsh environments such as railways and rail transit. Its core function is to stably and efficiently convert the input DC power on the vehicle (such as 110V DC from the battery or 600/750V DC from overhead lines) into the low-voltage DC power (such as 24V, 12V, 5V DC) required by various on-board electronic devices. As the "heart" blood supply unit of railway vehicles, its reliability, safety and stability are directly related to the normal operation of key equipment such as train control, communications, and passenger information systems.

H2: Key characteristics and industry standards of DCDC power modules

Railway applications have much higher requirements for power modules than ordinary industrial products. A qualified railway-grade DCDC power module must have the following characteristics:

Wide input voltage range: Able to withstand wide range fluctuations in traction grid or battery voltage.

High isolation voltage: There is a high level of electrical isolation between input and output to ensure system safety and anti-interference capabilities.

Excellent EMC/EMI performance: Complying with railway electromagnetic compatibility standards such as EN 50121-3-2, it neither causes external interference nor resists interference from the external complex electromagnetic environment.

Strong environmental adaptability: wide operating temperature range (usually -40°C to +85°C), able to withstand vibration, shock, moisture and salt spray corrosion.

Comprehensive compliance certification: Must pass a series of strict industry certifications such as IRIS (International Railway Industry Standard) and EN 50155 (Railway Applications - Rolling Stock Electronic Equipment).

Table: Overview of key standards for railway DCDC power modules

Standard/certification core content description

EN 50155 stipulates the core requirements for operating temperature, power input changes, electromagnetic compatibility, vibration and impact of railway on-board electronic equipment.

EN 50121-3-2 is an electromagnetic compatibility standard specifically for railway applications, ensuring that equipment can operate normally in the railway electromagnetic environment and not interfere with other systems.

IRIS International Railway Industry Quality Management System Standard represents the manufacturer's reliable quality management capabilities in the railway field.

EN 45545 fire protection standard for railway vehicles has clear requirements for the flame retardancy of materials.

H2: DCDC railway power module frequently asked questions (FAQ) answers

H3: 1. How to choose a suitable DCDC power module for my railway project?

Selection is the first step to ensure system stability. Please follow these steps:

Determine the input voltage range: Determine the nominal voltage and maximum fluctuation range of your system (for example: nominal 110Vdc, range 70Vdc - 140Vdc).

Determine the output voltage and current: Calculate the total power requirements of all load devices and reserve a 20%-30% margin.

Confirm isolation requirements: Most railway applications require reinforced insulation or double insulation, please refer to the EN 50155 standard.

Assess environmental conditions: Clarify the operating temperature, humidity, and vibration levels that the equipment will face.

Check for certification marks: Make sure the product has the rail industry certifications required by your target market (e.g. EN 50155, IRIS).

H3: 2. What is the typical efficiency of railway power modules? Why is efficiency important?

The full load efficiency of high-quality railway DCDC power modules can usually reach more than 90%. High efficiency means:

​Lower energy loss: Save energy and reduce operating costs.

Less heat generation: Reduces heat dissipation requirements, improving component life and overall system reliability.

Higher power density: Allows for the design of more compact devices.

H3: 3. What is the significance of the module’s MTBF (Mean Time Between Failures) indicator?

MTBF is a key indicator to measure product reliability, usually measured in hours. A high MTBF value (e.g. > 1,000,000 hours) indicates that the module has extremely high theoretical service life and reliability. In the railway industry, long life and low failure rate are crucial selection criteria.

H2: DCDC Railway Power Module Troubleshooting Guide

When an abnormality occurs in the power module, systematic troubleshooting can help quickly locate the problem.

H3: Preliminary inspection and safety precautions

Safety first: Before operation, ensure that the system is powered off and the high-voltage capacitor is fully discharged.

Visual inspection: Check the module for obvious physical damage, such as scorch marks, bulging capacitors, loose or corroded connectors.

Connection check: Confirm that the input/output cables are connected correctly and securely, and there are no short circuits or virtual connections.

H3: Systematic troubleshooting process

Table: Common faults and troubleshooting methods of DCDC power modules

Fault phenomenon Possible causes Troubleshooting steps

No output, indicator light does not light up 1. The input power is not connected or the voltage is too low

2. The input fuse is blown

3. Internal fault of the module 1. Measure whether the input voltage is within the allowable range

2. Check and replace the fuse (it is necessary to find out the cause of the fuse)

3. If the input is normal, the module may be damaged.

Output is unstable or the voltage is too low 1. The input voltage fluctuates too much

2. Output overload or short circuit

3. Overheating protection caused by excessive ambient temperature

4. Module aging 1. Monitor the input voltage waveform and range

2. Disconnect the load and measure whether the no-load output voltage is normal.

3. Check the cooling fans and air ducts to improve ventilation conditions

4. Contact the supplier for testing

The module is abnormally hot 1. Overload operation

2. Poor heat dissipation

3. Reduced efficiency (aging of internal components) 1. Measure the actual load current to confirm that it is not overloaded

2. Clean the radiator dust to ensure air circulation

3. If the load and heat dissipation are normal, professional maintenance is required.

The system is subject to electromagnetic interference 1. The module EMC performance does not meet the standard.

2. Improper input/output cable routing 1. Confirm that the module complies with EN 50121-3-2 standard

2. Check whether the input/output wires are shielded and routed separately from the power wires.

H3: When do you need to seek professional support?

If you have completed the above basic troubleshooting but the problem still exists, or if you encounter the following situations, please contact our technical support team immediately:

There are obvious component damages inside the module.

The fuse is repeatedly blown.

Involves complex system integration issues.

Requires firmware upgrade or parameter reconfiguration.

H2: Conclusion: Choosing a reliable partner is crucial

DCDC railway power module is not only a simple power converter, but also the cornerstone to ensure the safe and efficient operation of the entire railway system. Choosing a supplier with deep technical accumulation, complete industry certification and global technical support capabilities is the wisest decision to avoid risks and ensure long-term stable operation of the project.