Specifications

Theory of Operation
16
31007715 6/2008
Advantys STB Islands of Automation
System
Definition
Advantys STB is an open, modular distributed I/O system designed for the machine
industry, with a migration path to the process industry. Modular I/O, power
distribution modules (PDMs) and a network interface module (NIM) reside in a
structure called an island. The island functions as a node on a fieldbus control
network and is managed by an upstream fieldbus master controller.
Open Fieldbus
Choices
An island of Advantys STB modules can function on a variety of different open
industry-standard fieldbus networks. Among these are:
z Profibus DP
z DeviceNet
z Ethernet
z CANopen
z Fipio
z Modbus Plus
z INTERBUS
A NIM resides in the first position on the island bus (leftmost on the physical setup).
It acts as the gateway between the island and the fieldbus, facilitating data exchange
between the fieldbus master and the I/O modules on the island. It is the only module
on the island that is fieldbus-dependent—a different type of NIM module is available
for each fieldbus. The rest of the I/O and power distribution modules on the island
bus function exactly the same, regardless of the fieldbus on which the island resides.
You have the advantage of being able to select the I/O modules to build an island
independent of the fieldbus on which it will operate.
Granularity Advantys STB I/O modules are designed to be small, economical devices that
provide you with just enough input and output channels to satisfy your application
needs. Specific types of I/O modules are available with two or more channels. You
can select exactly the amount of I/O you need and you do not have to pay for
channels that you don’t need.
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