14 Interbus-S

14.1 Introduction

Interbus-S is an open architecture, serial bus, mater-slave type fieldbus communication system that operates in an active ring topology. It consists of one master and up to 511 slave devices. Each slave has an input and an output connector. It was developed by Phoenix Contact in 1984 to interchange data between control systems such as personal computers (PCs), programmable logic controllers (PLCs), and distributed input/output (I/O) modules that communicate with sensors/actuators. A maximum of 4096 digital I/O points for a maximum distance of 400 m can be connected via this network. These points can be updated in 14 ms by employing a variable frame transfer protocol. This time can further be reduced by employing ...

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