Complete overview of PROFIBUS

PROFIBUS is used to connect field devices, e.g. distributed I/O devices or drives, to automation systems such as SIMATIC S7, SIMOTION, SINUMERIK or PCs. PROFIBUS is standardized in accordance with IEC 61158/61784 and is a powerful, open and rugged fieldbus system with short response times. PROFIBUS is available in different forms for various applications.

PROFIBUS DP
(distributed I/O)

is used for connecting distributed field devices, e.g. SIMATIC ET 200, or drives with extremely fast response times. PROFIBUS DP is used when sensors/actuators are distributed at the machine or in the plant (e.g. field level). The actuators and sensors are connected to the field devices.
The field devices are supplied with output data in accordance with the master/slave technique and transfer input data to the controller or PC.

Openness all along the line

Thanks to the openness of PROFIBUS DP, standard-compliant components from different manufacturers can also be connected. The IEC 61158/61784 standards provide future protection for your investment. A simple link to other bus systems, e.g. from the AS-Interface, is implemented by means of links and thus permits an integrated solution in the field of failsafety for the protection of both human and machine.

Siemens has a complete range of products of standard and fail-safe controllers, network components, communication software and field devices. And for field device manufacturers, Siemens offers everything to do with the PROFIBUS DP interface, such as ASICs, training, certification, and much more.

PROFIsafe
permits standard and safety-related communication on one and the same bus cable. It is an open solution for safety-related communication over standard buses and uses the PROFIBUS services.

Isochronous mode

The CPU, I/O and user program are synchronized with the PROFIBUS cycle. The "Isochronous mode" function is supported by many CPUs of SIMATIC, SIMOTION, SINUMERIK and servo drives. The drives are controlled using the PROFIdrive profile.

PROFIBUS PA
(Process Automation)

expands PROFIBUS DP with intrinsically safe transmission of data and power (e.g. transducers in the food processing industry) in accordance with the international standard IEC 61158-2 (same protocol, different physical properties).
PROFIBUS PA is used predominantly in the hazardous areas of refineries (chemical, oil and gas).