Composition of PROFIBUS system ：

PROFIBUS system is mainly composed of central controller, field devices and communication network. For example, in traffic detection control and guidance facilities, zoning control is carried out through SIEMENS S7-300 controllers, which are connected to the central control system using PROFIBUS fieldbus to realize the needs of decentralized control and chain control.

PROFIBUS transmission technology ：

PROFIBUS uses RS-485 transmission technology and supports a linear bus structure with transmission speeds between 9.6kb/s and 12Mb/s. The transmission speed and cable length depend on the selected fieldbus. The transmission speed and cable length depend on the selected transmission speed, e.g. a maximum cable length of up to 1,200 meters is possible at a transmission speed of 9.6kb/s. In addition, PROFIBUS-PA utilizes IEC 1158-2 transmission technology, which meets the intrinsically safe requirements of the chemical and petrochemical industries and supports current-free continuous transmission ：

PROFIBUS application areas and advantages:

PROFIBUS is widely used in manufacturing automation, process industry automation and automation in other fields such as building, transportation and power. It can realize decentralized digital control and field communication network from field equipment level to workshop level monitoring, providing solutions for integrated factory automation and equipment intelligence