Expert’s answer: PROFIBUS PA and PROFIBUS DP

PROFIBUS PA and PROFIBUS DP – that’s the question. The PROFIBUS DP offers high-speed communication between systems and decentralized devices. It uses cables based on the RS-485 standard or optical fiber. Nearly 90 percent of the slaves on  PROFIBUS networks operate from PROFIBUS DP.

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On the other hand, the PROFIBUS PA connects field devices and control systems in hazardous areas, like those with explosive gas. The PROFIBUS PA allows all the field data to travel on the same pair of cables. It also keeps the devices loop-powered, to reduce currents that could set off explosions.

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