KROHNE IFC 090F Converter EEx-ATEX EN - Manual (Page 11)

ALTOFLUX IFC 090 F-EEx and ALTOFLUX IFC 090 F / i-EEx 11
2.5 Regular IFC 090-EEx electronics unit
The field cables that enter the terminal compartment of the IFC 090-EEx signal converter unit (i.e.
power supply, current and binary outputs) are non-intrinsically safe. To connect external devices
to the signal output terminals, the wiring requirements for the type of protection of the
compartment (standard: increased safety "e", optional: flameproof "d") must be conform to the
international or national standard involved (e.g. EN 60079-14).
Terminal arrangement in terminal compartment
pulse and status outputs
or control inputs
100 - 240 V AC / 48 - 63 Hz
24 V AC / DC
PE Protective
earth
FE Functional earth
Passive pulse/status output
Active current output
I
≤ 150 mA
electronic
or electro-
mechanical
totalizer
I ≤ 150 mA
U
ext
≤ 32 V DC
≤ 24 V AC
e.g.
signal
indicator
R
i
≤ 500 Ω
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.
For power supply versions with the nominal voltage in the range of 100 to 230 Vac the PE
conductor must always be connected to the M5 clamp terminal marked with the safety earth
symbol that is press-fitted in the dividing aluminium wall of the signal converter housing. For the
24 Vac/dc power supply, the PE conductor may be connected, but it not required for the safety of
tthe flowmeter. The terminal arrangement is shown above.
binary
outputs
current
output