To install and operate a building's management
systems requires a wide range of technologies
of different complexities. The control, monitoring
and optimization of the various functions
and services include heating and cooling, ven -
tilation, lighting and often even the management
of electric appliances.
　

The basic control technologies have been in exis -
tence for some time. Systems are available in
various degrees of complexity, ranging from the
timer-controlled water heater or thermo static
radiator valves (TRVs), to the so-called “intelligent
houses” which manage, according to prearranged
efficiency criteria, everything from
safety and security systems to air conditioning,
and from lighting and ventilation systems to
telematic services and domestic appliances.
　

KNX

KNX standard is based upon more than 15 years
of experience in the market including its pre -
decessors EIB, EHS and BatiBUS.
In May 1999 the KNX Association cvba was
formed from combining:
• EIBA (European Installation Bus Association)
• EHSA (European Home Systems Association)
• BCI (BatiBUS Club International)
Its main objective is to promote the global standard
for fieldbus applications in home and building
control.

Standard offering from a
registered manufacturer

KNX is approved as:

• European Standard (CENELEC EN 50090
and CEN EN 13321-1)
• International Standard (ISO/IEC 14543-3)
• Chinese Standard (GB/Z 20965)
• US Standard (ANSI/ASHRAE 135)

KNX is user-friendly and simple, the physical
layer is extremely easy to install with a remote
power supply network and a to tally open topology.
One single KNX cable running throughout
the building is all that is required to handle all
the appli cations. This cable also powers the
KNX sensors.
　

For ease of identification, every module of the
installation is identified by a selected address
by means of either drum wheels, dip switches
or keyboards with displays.
　

Bus, star, ring, tree or any other combi nation
can be installed as required, so this flexible
architecture makes the system easy to extend.
If the premises or the fun ctions are modified,
simply change the ad dress list or connect an
additional component to the bus.
　

The bus communication is based on a screened
twisted pair cable design and is available in 1
and 2 pair configurations as well as an LSNH
version for use in public areas.