Sponsored by MTM Power

New DC/DC Converters with 400 W for the railways

With a complete redesign of the series PCMD400 MTM Power® provides – with the new PCMDS400 series – converters using state-of-the-art technology, which at the same time fulfil all applicable standards for the different railway applications.

MTM Power® has been a reliable and experienced partner of the railway sector for more than 25 years. The quality of innovative products as well as the flexibility and reliability of the company are the decisive factors. Sound technological and industrial knowhow are combined with the highest quality standards. Comprehensive experience over many years directly impacts on the development of new products - as well as the knowledge gained from the close cooperation with the normative committees and customers.


MTM Power ´s DC/DC Converter PCMDS400

In recent years, the Thuringian power supply manufacturer MTM Power® has increasingly developed into one of the leading power supply manufacturer for railway applications in Europe. The decisive factor is the quality of the company’s innovative products and the flexibility and reliability of the base business.

Alike resistant to mechanical stress like shock and vibration as well as to environmental influences such as condensation, humidity and conductive dusts - the MTM Power DC/DC converters series has been designed in accordance with EN 50 155, EN 45 545-2 and is suitable for sophisticated use in trains, for mounting in containers in the roof or underneath the floor, as well as in driver's cabs, engine compartments and in the wagon.

MTM Power® GmbH has developed the new DC/DC converter series PCMDS400 for universal applications in railway and vehicle technology. The PCMDS400 series is based on a revision of the well-proven PCMD400 converter series after more than 10 years of successful market presence. The aim of the development was a further increase in efficiency and reliability and the integration of various features such as "Power Good" signalling and stand-by operation.

MTM Power´s Range of Railway Products

The converters with an output voltage of 24 VDC deliver an output power of 400 W. The design of the output voltage with U/I (constant voltage/constant current) characteristic allows the supply of critical loads and charging of batteries (optional Uout=27,6 VDC). Two input voltage ranges according to EN 50155 are available: 72 VDC (43,2...100,8 VDC) and 110 VDC (66...154 VDC) which allow the operation of the DC/DC converters on common battery or on-board networks in Europe, in track-side applications and in stationary railway systems.

The devices have got an "Output Voltage OK" signal as potential-free contact as well as remote control to place the converter in a standby mode with the lowest power consumption. An undervoltage shutdown protects the converter as well as the application from damage during "Brown out" effects of the supply voltage. Using a primary-related control input RC (Remote Control), they can be put in a stand-by mode with lowest power consumption; thus, contributing to a longer availability of the supplied systems, especially during battery operation. The DC/DC converters are now connected via push-in cage clamp connectors with lever, which are designed for wire cross sections up to 4 mm². Designed for an operating temperature range of -40 to + 70 °C (class TX according to EN 50 155) the cooling is guaranteed either by the integrated heat sink (option WK) or by mounting the base plate on a heat dissipating surface. Due to their compact design, the converters are suitable for applications where only little space is available. Furthermore, they are robust against mechanical stress such as shock and vibration. The maintenance free converters are vacuum potted (EP 1 987 708, U.S. Patent No. 8,821,778 B2) and offer reliable protection against condensation, conductive dust and other environmental conditions.

Thermoselective Vacuum Encapsulation Process

A version with protection degree IP67 is possible on customer request. The compact dimensions of 170 mm x 110 mm x 38 mm (length x width x height) and the high packing density allow an efficient, cost-saving solution for different power supply tasks.

Besides these rail converters, the product range includes transformers, filters and multi-power supply systems up to 2 kW. At the same time, custom-made products or modifications of existing products can be realised also in relatively small volumes and in a short period of time.

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MTM Power® Messtechnik Mellenbach GmbH