Installing/mounting
4
4.1 Basic safety notes
NOTICE
Direct sunlight
Damag
e to device.
The device can overheat or materials become brittle due to UV exposure.
• Protect the device from direct sunlight.
• Make sure that the maximum permissible ambient temperature is not exceeded. Refer to
the information in Technical data (Page 79).
4.1.1 ATEX/IECEx and others
4.1.1.1
Safety information for installation in "Intrinsic safety "ia/ib"
Zones 0, 1, 2, 20, 21, 22 and M1
General installation information
The rst two digits of the serial number stand for the year of production. With aluminum
enclosures, you also have to make sure during installation that ignition sources due to sparks
caused by impact or friction are prevented. In the case of enclosures made of non-metallic
materials or painted metal, electrostatic charging must be prevented.
The distance between terminals, including the stripped core, must be a minimum of 3 mm from
each grounded metal part.
The test terminals allow for direct measurement of the loop current without impairing the loop
integrity. When using the test terminals, the transmitter must be connected to the supply
voltage. Only use certied testing devices for installation in hazardous areas. If the transmitter/
local display is used in Ex nA or Ex ec protection type, it can no longer be used with intrinsic safety
afterwards.
Intrinsically safe circuits must withstand an insulation voltage of 500 V AC. The insulation
voltage is generated towards grounded enclosure parts, e.g. eld housing or control cabinet.
Observe the installation requirements according to IEC/EN 60079-11 Section 6.3.13. These
requirements are met by the TF320 /420 temperature transmitters and the TS500 temperature
sensor from Siemens.
SITRANS TH100/TH100Slim/TH320/TH420/TR320/TR420/TF320/TF420
Compact Operating Instructions, 07/2021, A5E41865021-AE 27
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