Safety systems and standards create new opportunities for manufacturers
Safety systems have evolved significantly and are requiring manufacturers to respond in an appropriate way. Manufacturers once viewed safety systems as simple mechanistic shutdown functions, but they have developed into technologies such as safety capable logic, which can react to machine conditions and improve productivity.
To use modern safety systems and standards effectively, manufacturers and designers need new tools. Current international safety standards provide quantitative methods to calculate risk and reliability - this is a big shift from the simple qualitative approach of EN 954, which did not require designers to assess the reliability of safety components.
There are many compelling reasons to adopt international safety standards. The most obvious are to meet the requirements of a global market and lay the groundwork for future expansion.
In today’s environment, machines exported to Europe must comply with International Organisation for Standardization (ISO) 13849-1 or International Electrotechnical Commission (IEC) 62061.
This positions manufacturers to take advantage of the framework provided by international safety standards to homogenise the operation of their plants around the world. This leads to cost savings in training and maintenance, as well as increased safety for workers and equipment.
The quantitative approaches of ISO 13849-1 and IEC/AS 62061:2005 are also useful for engineers seeking to explain the need for a particular safety system in an application or to justify the cost of a safety upgrade in terms of actual risk reduction.
International standards allow companies to demonstrate compliance to customers and gives them confidence their machines will operate safely, with reduced downtime resulting from component failures.
This can be augmented by employing engineers who have been certified as a Functional Safety Engineer by industry bodies. The main consideration for engineers today is to choose a standard they feel comfortable working with and select safety systems that meet the requirements of the operating environment and machine function.
International standards not only support global markets and complex safety technologies, but they give designers tools to quantify risk and provide a structured framework to implement integrated safety life cycle design.
Rockwell Automation held two Safety Automation Symposiums in Melbourne and Brisbane earlier this year to discuss safety standards and trends in designing machine safety applications.
A third, one-day symposium has been scheduled in Sydney on 9 October. Like the first two symposiums, the Sydney event will discuss several key themes of safety standards and systems, including the importance of risk assessments, functional safety in machinery and functional safety calculations.
For more information about the upcoming Safety Automation Symposium in Sydney, click here.
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