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Connecting
5.1 Safety notes on the connection
5.1.2
Safety notes when connecting in hazardous areas
Observe the degree of protection
The device must be connected to the supply and signal circuits named in the certificate or
on the nameplate.
When installing the device in hazardous areas:
Use enclosures/connection heads with the degree of protection corresponding to the test
certificate applicable in your country.
Electrical connection in hazardous areas
The national directives and laws for hazardous areas valid in your country must be
observed for electrical connection. In Germany these are, for example:
The health and safety at work regulations
The directive for "Installation of electrical systems in hazardous areas", DIN EN 60079-
The EC type examination certificate
When an auxiliary power supply is needed, check whether the auxiliary power supply
matches that given on the nameplate and the inspection certificate valid in your country.
CAUTION
Limited range of use
If the device has been operated outside the ambient conditions specified for potentially
explosive atmospheres, you may no longer operate the device in potentially explosive
atmospheres. Make sure to permanently mask all Ex markings on the nameplate.
NOTICE
Loss of type of protection "Intrinsic safety"
If the transmitter is not operated with an intrinsically-safe power supply, the type of
protection "Intrinsic safety" is no longer guaranteed and the intrinsically-safe approval may
be revoked.
Permanently erase, therefore, the irrelevant types of protection on the nameplate before
commissioning to ensure that erroneous deployment is avoided.
The 4 to 20 mA input and sensor circuits are electrically isolated and have been tested with a
voltage of 1.5 kV DC/1 minute.
The sensor circuit is reliably galvanically isolated from the auxiliary power supply and signal
circuit, up to a peak value of the rated voltage of 60 V. Be sure to observe the construction
directives valid at the construction location for electrical resources in hazardous areas. In
Europe, this is the standard EN 60079-14.
24
WARNING
WARNING
14 (previously VDE 0165, T1)
SITRANS TH200/TH300
Operating Instructions, 06/2010, A5E00393069-03
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