KROHNE ALTOFLUX IFM 4080 K EEx EN - Manual (Page 7)

6
Note:
The binary outputs (terminals B1, B
⊥
and B2) can only be configured as passive outputs,
the current output (terminals I+ and I) can only be configured as active output.
2.3 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). Figure 4 below
shows the terminal arrangement inside the terminal compartment.
Figure 4: Terminal arrangement in terminal compartment.
The non-intrinsically safe terminals for connection of the power supply (1L½ and 0L½) 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.
Metal dividing
plate IS / non-IS
terminals
NC 1L½ 0L½ 24 Vac/dc
L N 100…240 Vac
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
* * * *