The Profibus System; Typical Profibus-Dp Versapoint I/O Station - GE VersaPoint IC220PBI002 User Manual

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The Profibus System

Profibus is a serial bus system for data transmission between control systems and
distributed input and output modules, to which sensors and actuators are
connected.
Profibus has a star tree structure. In the Profibus topology the single bus devices
can be differentiated by means of their addressing. The communication profiles
determine how the devices transmit their data via the bus.
Profibus DP is normally a single master system. It is designed for easy
transmission of input and output data and specifically designed for communication
between automation systems and the distributed I/O devices.

Typical Profibus-DP VersaPoint I/O Station

A set of interconnected VersaPoint I/O modules can be selected to suit the
application, and connected as a slave on a Profibus-DP network. The interface
between the network and the modules is a VersaPoint Profibus-DP Network
Interface Unit (NIU) module.
The intelligent wiring method used in the VersaPoint modules allows I/O stations
to be constructed easily and quickly. Normally, it is only necessary for the power
supply units integrated in the Profibus NIU to be supplied with 24VDC on the input
side. They generate the operating voltage required for the NIU itself and for the
connected VersaPoint I/O modules.
2-2 VersaPoint™ I/O System Profibus-DP NIU User's Manual – August 2005 GFK-1911B