SIMATIC ET 200 System Benefits -
Use in hazardous areas
In many industries, the manufacture, processing, transport or storage of
combustible materials results in the creation or release of gases, vapors or
mist into the environment. Other processes create combustible dust. In
combination with oxygen in the air, a potentially explosive atmosphere can
occur that will result in an explosion if ignited.
Special properties must be exhibited by the equipment used in these
environments, and they must be certified. SIMATIC ET 200 is equipped for
this, and includes a corresponding range of products. The ET 200S, ET 200M
and ET 200iSP distributed I/O systems can also be used in areas subject to
gas and dust explosion hazards, e.g. in the chemical, food and tobacco or
pharmaceutical industries, or on drilling platforms.
The ET 200 systems can be used in different zones - either in Zones 2 and 1
in the case of gaseous atmospheres or in Zones 22 and 21 in the case of dust
atmospheres. The sensors and actuators linked to the I/Os can even be in
Zone 0.
A manufacturer's note is necessary for installation in Zone 2/22.
Certification for the gas/dust area must be procured for installation in
Zone 1/11.
Data communication takes place as usual over PROFIBUS DP. If communication
is continued beyond the potentially explosive atmosphere, i.e. beyond Zone 1
or 21, the PROFIBUS DP is made intrinsically safe by intermediate connection
of a fieldbus isolating transformer. This limits the ignition energy to the
permissible level and the intrinsically safe PROFIBUS is routed to the
hazardous area.
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Produkt presentation:
Intrinsically safe ET 200iSP
Brochure "SIMATIC ET 200 for Distributed Automation Solutions"
