Siemens SITRANS T Series - Safety Information for Installation in Non Incendive Na

• The transmitter/local display must be installed in a suitable enclosure that complies with the
installation requirements of the Canadian Electrical Code (CEC) or, in the USA, the National
Electrical Code (NEC).
• In the case of enclosures made of non-metallic materials or painted metal, electrostatic
charging must be prevented.
• Supply cables with a temperature rating of at least 5 C above ambient temperature must be
used.
WARNING: Intrinsic safety may be impaired when components are replaced.
5.1.2.2 Safety information for installation in "Non Incendive nA"
Hazardous areas CL I, Div 2, GP ABCD CL I, Zone 2 IIC
General installation information
• The transmitter/local display must be installed in an enclosure that ensures at least IP54
degree of protection according to IEC 60529 and that is suitable for the application and is
installed professionally. Cable entries and dummy elements must meet the same
requirements.
• In the case of enclosures made of non-metallic materials or painted metal, electrostatic
charging must be prevented.
• Supply cables with a temperature rating of at least 5 C above ambient temperature must be
used.
WARNING: Replacement of components may impair suitability for Class I, Division 2 areas.
WARNING: Do not perform terminal connection work on equipment if the power has not been
switched o󹪜 and the area has not been designated as safe.
Installation with "non incendive 󹪝eld wiring" protection type
The wiring concept for the "Non Incendive Field Wiring" type of protection allows the wiring of
devices with "Non Incendive Field Wiring" type of protection with associated devices of the same
type of protection or associated devices with "Intrinsic safety" type of protection or associated
devices that have not been speci󹪝cally tested as a combined system, with an permissible wiring
procedure for unclassi󹪝ed installation locations, Voc < V
max
, Ca ≥ Ci + C
Cable
, La ≥ Li + L
Cable
Installing/mounting
5.1 Basic safety notes
SITRANS TH100/TH320/TH420/TR320/TR420/TF320/TF420 with 4 to 20 mA/HART
64 Operating Instructions, 05/2020, A5E41864807-AB