Electrical connections
26 - EN TTF300 CI/TTF300-EN
4.6.1 Installation in a potentially explosive atmosphere
Transmitters can be installed in all kinds of industrial sectors. Potentially explosive systems are
divided into zones, meaning that a wide range of different instruments are also required.
Different certificates are required for these depending on region.
Important (Note)
Ex relevant specifications must be taken from the EC-type examination certificates and other
relevant certificates that apply in each case.
With transmitters for PROFIBUS PA and FOUNDATION Fieldbus H1 applications, FISCO /
FNICO interconnection methods can be used.
4.6.1.1 ATEX - Zone 0
Transmitter design: II 1 G Ex ia IIC T6
Zone 0 Ex area Zone 0 Safe area
BC
ia
A00126
ia
J
A
D
ia
Fig. 17
A Sensor
B Transmitter TTF300
C Supply isolator [Ex ia]
D Interface for LCD indicator
The input for the supply isolator must have an "Ex ia" design.
When using the transmitter in Zone 0, you must avoid impermissible electrostatic charging of
the transmitter (observe the warnings on the device).
As the user, it is your responsibility to ensure that the sensor instrumentation meets the
requirements of applicable explosion protection standards.
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