PROFIBUS (Process Field Bus) is a standardized, open bus system with three different protocol profiles.
PROFIBUS‐FMS (Fieldbus Message Specification) is applied for data transmission between different control units (e.g. PLC, PC).
PROFIBUS‐DP (Decentral Peripherie) is optimized for fast data exchange between the higher level control system and the peripheral field devices.
PROFIBUS‐PA (Process Automation) is an intrinsically safe bus system for the process industry.