IEC 60571:2012 covers the conditions of operation, design, construction, and testing of electronic equipment, as well as basic hardware and software requirements considered necessary for competent, reliable equipment. Applies to all electronic equipment for control, regulation, protection, supply, etc., installed on rail vehicles and associated with: either the accumulator battery of the vehicle; or a low voltage power supply source with or without a direct connection to the contact system. One of the technical changes with respect to the previous edition consists of the addition of nominal voltages of equipment.