What is BS EN 50325-5 - Controller-device interfaces about?
BS EN 50325-5 is the fifth part of the multiple series that specifies a safety-related communication layer (services and protocol) based on EN 50325-4.
BS EN 50325-5 applies to networks based on EN 50325-4 providing safety-related communication capabilities between devices in a safety-related system in accordance with the requirements of EN 61508 series for functional safety. The services and protocols defined in this standard are intended to extend those defined in EN 50325-4. These services and protocols may be used in various applications such as manufacturing, machinery, medical, mobile machinery and process control.
Note 1: BS EN 50325-5 does not cover the procedures for the safety-related configuration and for the safety-related setup of safety-related systems. The definition and implementation of such procedures depend on the kind of safety-related system. For example, flexible safety-related systems like operating theatres as found in medical systems require different procedures than fixed safety-related systems like cranes in mobile machinery.
Note 2: BS EN 50325-5 does not cover electrical safety, intrinsic safety and security aspects. Electrical safety relates to hazards such as electrical shock. Intrinsic safety relates to hazards associated with potentially explosive atmospheres. Security relates to enforcing policies to prevent changes in the safety-related system by unauthorized personnel.
Who is BS EN 50325-5 - Controller-device interfaces for?
BS EN 50325-5 on Controller-device interfaces is useful for: 
- Internet of Things IoT applications 
- Simulators assembly 
- Supervisory control and data system 
- Wireless communication systems 
- Data sensors and interface applications 
Why should you use BS EN 50325-5 - Controller-device interfaces?
fieldbus standard defines a communication protocol that enables distributed control of automated applications. Fieldbus technology is now considered well accepted and well-proven. Thus, many Fieldbus enhancements are emerging, addressing not yet standardized areas such as real-time, safety-related and security-related applications.
BS EN 50325-5 specifies the individual description of the functional safety profile for the communication profile defined in EN 50325-4 and safety layer extensions to the communication object and object dictionary sections in EN 50325-4. BS EN 50325-5 specifies a safety communication layer (profile and corresponding protocols) based on the communication profile and protocol layer of EN 50325-4.
Overall, BS EN 50325-5 provide the necessary confidence in the transportation of messages (information) between two or more participants on a field bus in a safety-related system or sufficient confidence in safe behaviour in the event of Fieldbus errors or failures.
