36
Reference Manual
00809-0100-2240, Rev DA
October 2017
4.4.5
Hazardous areas
When the Rosemount 2240S is installed in a hazardous area, national and local regulations and
specifications in applicable certificates must be observed. See Appendix B: Product Certifications.
Note
When the temperature transmitter is powered from a certified Ex [ib] or AEx [ib] FISCO Power Supply
with triplicated output voltage limitation meeting the requirements for two faults (“ia” voltage
limitation), e.g. a Rosemount 2410 Tank Hub via the Tankbus, the FISCO codings according to Control
Drawings 9240040-910 and 9240040-976, Note 8, apply, and the Rosemount 2240S can be connected
to RTDs or other sensors located in Zone 0.
However, Rosemount 2240S with ATEX and IECEx Certifications as well as Zone classification in USA and
Canada is also Ex-coded Ex ia or AEx ia (part of code) for both FISCO and Entity installations. In order to
maintain this coding the Rosemount 2240S must be powered from a Power Supply coded Ex [ia] or
AEx [ia]. Most general FISCO power supplies are, however, coded Ex [ib] for ATEX and IECEx and if the
Rosemount 2240S is powered from such a Power Supply, which has not triplicated output voltage
limitation, the Rosemount 2240S coding automatically becomes Ex ib.
This means that, in this case, neither the Rosemount 2240S itself nor any RTD or other sensors
connected to the RTD terminals or Sensorbus terminals of the Rosemount 2240S may be located in
Zone 0.
Summary of Contents for Rosemount 2240S
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Page 16: ...6 Reference Manual 00809 0100 2240 Rev DA Introduction October 2017 Introduction ...
Page 28: ...18 Reference Manual 00809 0100 2240 Rev DA Overview October 2017 Overview ...
Page 192: ...182 Reference Manual 00809 0100 2240 Rev DA Index October 2017 Index ...
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