Advantages provided by distributed field automation with application of the PROFIBUS PA profile included low hardware overhead, cost-effective engineering, increased operational safety and problem-free maintenance. These advantages are underlined by the following features:

• Modularity and uniformity from the sensor up to the control level permit new plant concepts
• Implementation of intrinsically-safe applications through use of the fieldbus in hazardous areas
• Redundant PROFIBUS PA architectures (ring and line topologies with coupler redundancy) support Flexible Modular Redundancy (FMR) from the automation system (controller) down to a PA field device
• Safety-related and fault-tolerant applications with low device and cabling requirements
• Reduced configuration costs through simple, central engineering of the field devices (PROFIBUS PA and HART with SIMATIC PDM, also cross-vendor)
• Simple installation using two wire cable for common power supply and data transmission
• Reduced commissioning costs through simplified loop check
• Low servicing costs thanks to simple wiring and comprehensive diagnostics facilities