CM4 Railway


CM4 has the experience and resources to develop any kind of solution related to the functionality of the railway applications (trains, subways, trams and infrastructure) at all stages of development, from the description of the technical specification of a component to the design and construction of the test benches for test and required training.

Front Hatch Mechanisms


  • Our experience has placed us leaders in Spain.
  • Our mechanisms are ideally suited to the requirements, customizing them to be installed in any type of headpiece.
  • Manual, pneumatic or electric operation.
  • Control system and remote control via infrared between trains.
  • Perform all necessary tests to validate its use.
  • Advice and support to the client in its implementation on the train.
Mechanical Devices

Total adaptation to the vehicle, whatever is the stage of development of your project.


  • Access ramps for disabled people.
  • Front ramps for emergency evacuation.
  • Drivers Access Systems.
  • Front deflector systems for trams.
  • Articulated automatic systems for wing mirrors.
  • Ergonomic Systems for drivers.
Tooling and Testing
  • Design and construction of welding tools, assembly and automation.
  • Equipments for testing departments.
  • Gearboxes test benches.
  • Levelling and weighing equipment for boxes on bogies.
Electronic devices


CM4 analyses customer requirements to supply tailor-made solutions for implementations on new or refurbished equipment.

CM4 produces electronic devices for control, monitoring and diagnosis with a complete development of hardware, software and communications. Our devices are able to communicate with the TCMS by independent signals or by bus.

Some applications examples include:

  • Front hatch mechanisms and coupler control.
  • Doors control.
  • HVAC and HVCC control.
  • Lighting control.
  • Communications.
  • Remote IO’s.