PROFIBUS-PA is a ‘profile’ of PROFIBUS designed specifically for use in process automation for connecting control systems with field instruments. PROFIBUS-PA is based on PROFIBUS-DP and, using a linking device called a SEGMENT coupler, permits TRANSPARENT communication between general purpose automation and process automation networks, making PROFIBUS ideal for hybrid applications where FACTORY and process devices intermingle. The PROFIBUS PA profile defines the behavior of the field devices and ensures full interoperability and interchangeability between different manufacturers. PROFIBUS PA operates EITHER with Intrinsically Safe transmission technology (acc. to IEC 61158-2) or standard transmission technology (acc. to RS485). In summary, PROFIBUS PA fulfils the special requirements of all sectors of the process industry as FOLLOWS:

• Transparent communication between process automation networks and general purpose automation networks is possible.
• PROFIBUS PA permits powering of the field instruments and data transmission over the same two wires.
• PROFIBUS PA can be used in potentially explosive atmospheres using Intrinsically Safe transmission technology according to IEC 61158-2.

PROFIBUS-PA is a ‘profile’ of PROFIBUS designed specifically for use in process automation for connecting control systems with field instruments. PROFIBUS-PA is based on PROFIBUS-DP and, using a linking device called a segment coupler, permits transparent communication between general purpose automation and process automation networks, making PROFIBUS ideal for hybrid applications where factory and process devices intermingle. The PROFIBUS PA profile defines the behavior of the field devices and ensures full interoperability and interchangeability between different manufacturers. PROFIBUS PA operates either with Intrinsically Safe transmission technology (acc. to IEC 61158-2) or standard transmission technology (acc. to RS485). In summary, PROFIBUS PA fulfils the special requirements of all sectors of the process industry as follows: