An apparatus, system and process is provided for communicating safety-related data, over an open system, from a sender to a receiver. Safety-related components, including function blocks, flexible function blocks, resource blocks and transducer blocks, as well as, safety-related objects are provided....http://www.google.ca/patents/US6999824?utm_source=gb-gplus-sharePatent US6999824 - System and method for implementing safety instrumented systems in a fieldbus architecture
