Section 1 Introduction The PROFIBUS Protocols
3BDS009029R5001 B 19
Only the two protocol types DP and PA today are important for process automation
and are supported within the 800xA System.
PROFOBUS DP: the bus for the Decentralized Periphery
The PROFIBUS DP (RS485) is responsible for communication between the
Controller level of a process automation system and the decentralized periphery in
the field, also intrinsic safety (RS485-IS) via DP-Ex barriers into hazardous area.
One feature of PROFIBUS DP is its scalable high speed of transmission up to
12 Mbit/s.
PROFIBUS PA: extension for Process Automation
This PROFIBUS variant was developed for the process industry. PROFIBUS PA
interacts with a fix transmission rate of 31,25 kbit/s and is designed for connection
of bus-powered 2-wire field devices such as transmitters and actuators.
Figure 1. The PROFIBUS family embedded in Industrial IT
To Next Page
Loading...
