KROHNE ALTOFLUX IFM 5080 K EEx EN - Manual (Page 3)

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2 Description of the system
The explosion protected compact-flowmeters differ from the standard flowmeters mainly in their
"internal assembly". Several types of protection are used in the compact flowmeter
IFM 5080 K / i-EEx, depending on the ordered type of the connection compartment of the signal
converter housing. See following overview:
Electronic compartment signal converter housing
EEx d (Flameproof enclosure)
Connection compartment signal converter housing
- Housing and connection terminals for power supply:
standard: EEx e (Increased safety)
optional: EEx d (Flameproof enclosure)
- Connection terminals of signal in/outputs (Current, Pulse/status/control and Fieldbus)
always EEx ia (Intrinsic safety. category ia)
Primary heads
EEx m (Encapsulation) and EEx e (Increased safety)
Internal electrode circuit
EEx ib (Intrinsic safety, category ib)
3 Installation in the pipeline
The installation of the compact flowmeter in the pipeline is equal to that of the standard compact
flowmeters.
4 Electrical connection
For the electrical connection of the compact flowmeter the relevant national standard codes of
practice for "Electrical installations of buildings" and "Electrical apparatus for use in potentially
explosive atmospheres" have to be consulted.
In the connection compartment of the IFM 5080 K/ i-EEx the terminals for the intrinsically safe
signal in/outputs and the non-intrinsically safe power supply circuits are placed. The location of the
connection terminals is shown in the sketch on the next page.
The cable for the signal in/outputs leading into the IFM 5080 K / i-EEx is intrinsically safe. The
connection of this cable must be carried out conform the requirements specified in the relevant
national standard code of practice for the installation of electrically apparatus with type of
protection "i".