KROHNE IFC 090F Converter EEx-ATEX EN - Manual (Page 12)

ALTOFLUX IFC 090 F-EEx and ALTOFLUX IFC 090 F / i-EEx 12
2.6 MODIS version IFC 090i-EEx electronics unit
The field cables of the non-intrinsically safe power supply and the intrinsically safe, category "ia"
signal outputs enter the terminal compartment of the IFC 090i-EEx signal converter unit via two
separate entrances. To connect external devices to the intrinsically safe signal output terminals,
the wiring requirements for their type of protection as well as of the compartment (standard:
increased safety "e", optional: flameproof enclosure "d") must be conform to the international or
national standard involved (e.g. EN 60079-14).
Terminal arrangement in terminal compartment
Metal dividing
plate IS / non-IS
terminals
NC 1L 0L 24 Vac/dc
L N 100…240
PE Protective Earth terminal
Connecting terminals
for intrinsically safe
signal in-/outputs
Connecting
terminals for
non-intrinsically
safe power supply
Cable entrance for
non-intrinsically
safe power supply
cable
Cable entrance for
intrinsically safe
signal cable
NC = not connected
* * * *
The non-intrinsically safe terminals for connection of the power supply (1L and 0L ) must be
connected according to the relevant standard code of practice for electrical apparatus intended for
use in potentially hazardous locations, type of protection Increased Safety "e" or type of protection
Flameproof Enclosure "d", depending on the type of protection of the terminal compartment of the
signal converter housing.
To gain access to the connection terminals of the power supply, the half-circular cover plate of
insulating material must be slightly lifted at one end and then rotated downwards, see the
instruction on the cover plate. After connection of the power supply cable, the half-circular cover
plate must be restored into its original position, so that the minimum clearances and creepage
distances towards the intrinsically safe signal in-/output terminals are maintained.
For details, see diagram on terminal compartment MODIS on next page.