KROHNE IFC 090F Converter EEx-ATEX EN - Manual (Page 16)

ALTOFLUX IFC 090 F-EEx and ALTOFLUX IFC 090 F / i-EEx 16
For the connection diagrams of the intrinsically safe signal in-/outputs of the installed MODIS
modules in the IFC 090i-EEx electronics unit (see next pages). It has to be noted that the
intrinsically safe signal in-/outputs may only be connected to the following listed apparatus
(registering devices like amp-meters, pulse counters, etc.):
EEx-approved intrinsically safe apparatus;
EEx-approved associated apparatus;
Passive apparatus as defined in your national standard for installation of electrical apparatus in
hazardous locations (e.g. EN 60079-14).
Other types of apparatus may only be connected to the intrinsically safe signal in-/outputs through
EEx-approved safety barriers, isolating interface units and the like. These barriers or units are not
depicted in the connection diagrams for reasons of readability. It is assumed that they are an
integrated part of the registering devices or as separate devices connected in series with them.
The registering devices may only be installed in the hazardous location if they also have a type of
protection for explosion safety according to the European Standards of the EN 500xx series, or if
they are constructed as prescribed in your standard national code of practice.
When the intrinsically safe signal in-/outputs are connected to other intrinsically safe or associated
apparatus, the maximum safety values (i.e. entity parameters) of all intrinsically safe circuits have
to be considered.
Important !
The 100…230 Vac power supply versions of the IFC 090i-EEx signal converter
electronics unit with MODIS modules can only be equipped with passive outputs.
Therefore the connection diagrams with the numbers 2, 4, 5, 7, 9, 11 and 12 are
applicable for the 100…230 Vac power supply versions.