Remote switching
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Application Interfaces
Application Interfaces
The Forum 523/524 communications system supports a series of application
interfaces which are used by external systems to access functions of the
communications system. Communication between the external system and
the Forum 523/524 communications system is principally transported via the
LAN connection or using the IP network protocol. The respective functions
differ depending on the application interface. The properties, function and
requirements of the various application interfaces are explained in the
following sections.
Remote switching
The function
Remote switching
allows to display the state of several func-
tions of the communication system Forum 523/524 by means of external
devices (e. h. light switches, emergency lights). In addition, these external
devices can be controlled remotely by the communications system, e. g. a door
station.
Field bus
The external devices and their functions are controlled via the KNX field bus of
the building automation system. The communication system Forum 523/524
is connected with a remote switching IP router, serving as a gateway to the
field bus.
Bus participant
A bus participant refers to a device that participates in the field bus communi-
cation.
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External devices can be sensors (e. g. touch sensors) or actors (e. g.
switching actors, dimming actors). Some bus participants combine both
functions. Also, many bus devices offer separated channels. A quadruple
switching actor, for instance, features 4 channels, that can specifically be
activated from sensors on the field bus.
Example:
A sensor registers the brightness in the stairwell and sends this
information on the field bus. The switching actors on the field bus receive
this information and perform the “Switch light” action.
Summary of Contents for forum 523
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