KROHNE ALTOFLUX IFM x080 K ATEX EN - Manual (Page 10)

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 10
1.4
IFC 090/…-EEx signal converter
The IFC 090/…-EEx signal converter consists of a cylindrical housing of die-casted aluminum,
which has two separate compartments, divided from each other by an integrated wall with casted
flameproof terminal feed-through. The neck at the bottom of the housing contains a flameproof
cable feed-through. The signal converter housing is on both ends closed by a cylindrical threaded
cover with O-ring sealing. The housing has an ingress protection degree of at least IP67 conform
to EN 60529.
1.4.1 Electronics compartment
The electronics compartment accommodates the pre-certified IFC 090…-EEx electronics unit with
approval number PTB 98 ATEX 2012 U. The electronics compartment is designed with type of
protection flameproof enclosure "d" according to EN 50018. It is closed by a threaded flameproof
display cover with glass window.
1.4.2 Terminal compartment
The terminal compartment has seven terminals for connection of the power supply and signal
output circuits. Sect. 2 (Connection diagram) shows the terminal arrangement for the regular and
MODIS version of the IFC 090/…-EEx signal converter. The terminal arrangement of the MODIS
version (i.e. IFC 090i-EEx) is shown in Sect. 2 (Modis Converter). Two of the terminals are used
for connection of the non-intrinsically safe power supply and four terminals (marked with "*") for
the intrinsically safe, category "ia" signal outputs of the MODIS modules. The non-intrinsically and
intrinsically safe terminals are separated from each other by a metal dividing plate, which is
screwed to the remaining (not connected) M4 terminal. The two non-intrinsically safe power
supply terminals are covered by an insulating plate.
The terminal compartment (with standard type of protection increased safety "e") is standard
equipped with two ATEX approved "EEx e" cable glands. The terminal compartment can also be
provided as a flameproof enclosure "d", in which case ATEX approved "EEx d" cable glands of
size Pg13.5, Pg16 or M20x1.5 are either factory installed or must be installed by the customer.
For flameproof conduit systems, the terminal compartment must have type of protection
flameproof enclosure "d" according to EN 50018. The conduits must be sealed by "EEx d"
approved (within the ATEX 100a directive) sealing devices (i.e. stopping box) directly at the
conduit entrances of the as flameproof enclosure performed terminal compartment.