Profibus Products

The Best PLC Integration Available

PROFIBUS is an open field-level standard for industrial networks in manufacturing and process automation. Vendor independence and openness are ensured by the European standards EN 50170 and EN 50254.

PROFIBUS-DP (Decentralized Peripherals) is a network that is made up of two types of devices connected to the bus: master devices and slave devices. It is a bidirectional network, meaning that one device, a master, sends a request to a slave, and the slave responds to that request. Thus, bus contention is not a problem because only one master can control the bus at any time, and a slave device must respond immediately to a request from a master.

PROFIBUS distinguishes between the following types of device:

• Master devices determine the data communication on the bus. A master can send messages without an external request when it holds the bus access rights (the token). Masters are also called active stations.
• Slave devices are peripherals such as I/O devices, valves, drives and measuring transducers. They do not have bus access rights and they can only acknowledge received messages or send messages to the master when requested to do so. Slaves are called passive stations. Since they only require a small portion of the bus protocol, their implementation is particularly economical.

AMCI offers encoders, stepper drives and other products with embedded Profibus-DP communication.