New Standards Announced For Safety-Related Parts Of Control Systems
The American Society of Agricultural and Biological Engineers (ASABE) recently announced the publication of four new international standards that provide guidelines for the design and assessment of safety-related electrical and electronic systems on tractors used in agriculture and forestry.
These four new standards, parts 1 to 4 of “Tractors and machinery for agriculture and forestry — Safety-related parts of control systems,” were recently published in English and French for international use. They are titled as follows:
- ISO 25119-1 Part 1: General principles for design and development
- ISO 25119-2 Part 2: Concept phase
- ISO 25119-3 Part 3: Series development, hardware and software
- ISO 25119-4 Part 4: Production, operation, modification and supporting processes
The ISO 25119 series adopts a risk–based design approach, while providing a means of specifying performance levels for safety-related functions. Intended to reduce specific risks under all operating conditions, the standards provide requirements for the entire lifecycle of the control system, from design through decommissioning.
The safety-related components can consist of hardware or software, can be separate or integrated parts of a control system, and can either perform solely critical functions or form part of an operational function. As specified in the new standards, the design and validation of the safety components are combined as part of a risk assessment. Performance levels and categories defined in the standard can be applied to the control systems of both simple and complex mobile machines as well as to those of protective equipment, such as interlocking or pressure-sensitive devices.
For information on this new standard or other ASABE activities in ISO, contact Ted Tees (269) 932-7005 or by emails at ted@asabe.org. ◆