IEC 60571-2012 pdf free

IEC 60571-2012 pdf free.Railway applications – Electronic equipment used on rolling stock.
IEC 60571 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.
Additional requirements in other standards or individual specifications may complement this standard, if they are justified.
Specific requirements related to practices necessary to ensure defined levels of functional safety are determined in accordance with 4.6.3.1 and 4.6.3.2 of IEC 62278 and its informative Annex A.
Software safety integrity level of 1 or higher shall only be considered when it is shown that a residual safety risk remains and that it has to be carried by the software driven programmable electronic system, In such a case (i.e. software safety integrity level 1 or higher), IEC 62279 is applicable.
For the purpose of this standard, electronic equipment is defined as equipment mainly composed of semiconductor devices and recognized associated components. These components will mainly be mounted on printed boards.
NOTE Sensors (current, voltage, speed. etc.) and firing unit printed board assemblies for power electronic devices are covered by this standard, Complete firing units are covered by IEC 61287-1,
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply:
printed board
base material cut to size containing all holes and bearing at least one conductive pattern. Printed boards are typically subdivided according to:
— their structure (e.g. single and double-sided. multilayers)
— the nature of the base material (e.g. rigid, flexible)
3.2 printed board assembly
printed board with electrical and mechanical components and/or other printed boards attached to it with all manufacturing processes, soldering, coating, etc., completed
3.3 plug-in unit
unit which plugs into a subrack and is supported by guides. These units can be of various types, ranging from a printed board with components mounted in a frame or box type unit, designed with a plug-in connection.IEC 60571 pdf free download.