Module Introduction PROFIBUS is a kind of internationalized and open-ended Fieldbus Standard, which doesn’t depend on Equipment Manufacturer. It is widely applied in the Manufacturing Automation, Process Industry Automation, and Building, Traffic Electricity and other fields’ Automation. The PROFIBUS consists of three parts, which are PROFIBUS-DP (Decentralized Periphery), PROFIBUS-PA (Process Automation) and PROFIBUS-FMS (Fieldbus Message Specification). The three parts can be considered as three different transmission protocols, whose encoding, electric characteristics, data link are different. (1) PROFIBUS-DP: It is a high-speed and low-cost communication and applied in the communication of the Device-level Control System and the Distributed I/O. Using the PROFIBUS - DP can replace the 24VDC or 4-20mA Signal Transmission. It adopts the RS485 Transmission, the transmission speed is from 9.6Kbps to 12000Kbps. (2) PORFIBUS-PA: It is designed for the Process Automation, which makes the sensor and implementation section connect in one Bus, and it owns the Intrinsic Safety Specifications. It adopts the IEC1158－2 Specifications, Digital Bit Synchronization Manchester Encoding and the transmission speed is 31.25Kbps. (3) PROFIBUS-FMS: It is applied in the Plant-level Monitoring Network. It is a Token Structure and Real-time Multi-master Network. It also adopts the RS485 Transmission. PROFIBUS is a kind of Fieldbus Technology, which is applied in the Automation Plant-level Monitoring for manufactories and Filed Device-level Data Communication and Control. It can realize the Distributed Digital Control and the Field Communication Network from the Filed Device-level to Plant-level Monitoring, then it provides the viable solutions for realizing the Manufactory Automation and Field Device Intelligentization. To compare with other Fieldbus Systems, the great advantage of the PROFIBUS is that it owns the stable International Standard, EN50170, and the universality according to the factual application verification. At present, the application fields include the Manufacturing Process, Process Control, Automation and so forth. The openness and ideas of Not-rely on Manufactories of the PROFIBUS has been realized in more than 100 thousand successful applications. According to the Marketing Research, the PROFIBUS accounts for more than 40 percent of the markets of the Openness Industry Fieldbus System in the German and European markets. The PROFIBUS is supported by manufacturers which produce the international and famous Automation Technology Device. These manufacturers possess of their own technology advantage and can provide the wide and advanced new product and technology service. Application Field It is mainly applied in the Communication Design between the Automation Control System and Device-level Distributed I/O. 【DOWNLOAD】