KROHNE VARIFLUX IFM 6080 K-EEx-i-EEx EN - Manual (Page 11)

ALTOFLUX IFM x080 K-EEx and ALTOFLUX IFM x080 K / i-EEx 11
Electrical data of in-/output circuits
Terminals Description Nominal voltage Maximum current
I+, I Current output 15 V 22 mA
B1, B ⊥, B2 Pulse, status, control in-/outputs 32 V 150 mA
The mains transformer is protected against overheating by a temperature breaker in series with the
primary winding. The temperature breaker is casted within the compound of the transformer and has an
opening temperature of 125 °C (± 5 K).
IFC 090i-EEx unit with MODIS modules
The IFC 090i-EEx electronics unit is equipped with a pair of MODIS-modules. It is equipped with one of
the following power supplies.
Electrical data of IFC 090i-EEx electronics unit
Power supply Terminals Function Electrical data
AC-version
L
N
PE Live
Neutral
Protective Ground
U
n
= 100…230 Vac –15%/+10%
P
n
= 15 VA, U
m
= 253 V
AC/DC-version
1L Ÿ
0L Ÿ
FE Live
Neutral
Functional Ground
U
n
= 24 Vac/dc
AC: -15%/+10% or 20.4…26.4 Vac
DC: -25%/+30% or 18…32 Vdc
P
n
= 10 W, U
m
= 253 V
NOTE: The mains fuses for both electronics units are listed in Sect. 6 of this manual.
2 Electrical connection
2.1 Equipotential bonding system
All EEx and EEx/i flowmeters must always be incorporated into the equipotential bonding system of the
hazardous area. This connection can be achieved through the PE/FE conductor connected to the PE
terminal in the terminal compartment (see figure of terminal arrangement below) or through a separate
PE conductor, cross sectional area at least 4 mm
2 , connected to the external PE clamp, placed below
the converter housing.
2.2 Connecting cables
NOTE:
The below described cables are shown in the following connection diagram.
Cable A:
Signal cable for current output and binary outputs (pulse and status output): The cable parameters must
be in accordance with the regulations in the EN 60079-14 "Electrical installations in hazardous
locations" or an equivalent national standard. For the MODIS version with IFC 090i-EEx electronics unit
(right detail in connection diagram) the signal cable for the intrinsically safe signal in-/outputs must also
conform the requirements as specified in the relevant standard national code of practice for the
installation of electrical apparatus with type of protection Intrinsic Safety "i".
Cable B:
Power supply cable: The cable parameters must be in accordance with the regulations of the EN 60079-
14 "Electrical installations in hazardous locations" or an equivalent national standard.
The PE terminal must be connected to the protective ground conductor of the mains supply.
Rated voltage:
≥ 500 V
Examples: H07...-., H05...-.
Equipotential bonding conductor
Cross-sectional area:
4 mm
2 (equivalent to AWG 10)