Product overview
BC9000 and BC91008 Version: 4.0.0
2 Product overview
2.1 Principle of the Bus Terminal
Fig.1: Principle of the Bus Terminal
2.2 The Beckhoff Bus Terminal system
Up to 256 Bus Terminals, with 1 to 16I/O channels per signal form
The Bus Terminal system is the universal interface between a fieldbus system and the sensor / actuator
level. A unit consists of a Bus Coupler as the head station, and up to 64 electronic series terminals, the last
one being an end terminal. Up to 255 Bus Terminals can be connected via the K-bus extension. For each
technical signal form, terminals are available with one, two, four or eight I/O channels, which can be mixed
as required. All the terminal types have the same mechanical construction, so that difficulties of planning and
design are minimized. The height and depth match the dimensions of compact terminal boxes.
Decentralised wiring of each I/O level
Fieldbus technology allows more compact forms of controller to be used. The I/O level does not have to be
brought to the controller. The sensors and actuators can be wired decentrally, using minimum cable lengths.
The controller can be installed at any location within the plant.
Industrial PCs as controllers
The use of an Industrial PC as the controller means that the operating and observing element can be
implemented in the controller's hardware. The controller can therefore be located at an operating panel, in a
control room, or at some similar place. The Bus Terminals form the decentralised input/output level of the
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