KROHNE IFC 090F Converter EEx-ATEX EN - Manual (Page 17)

ALTOFLUX IFC 090 F-EEx and ALTOFLUX IFC 090 F / i-EEx 17
Connection diagrams 1 to 4 of the intrinsically safe signal in-/outputs
1 Current output I
active
2 Current output I
passive
Version: Ex-i3 Versions: Ex-i1, Ex-i2, Ex-i7
I = 4 - 20 mA U
ext
= 8.1 - 30 V
R
i
= 350 Ω I = 4 - 20 mA
R
i
≤ (U
ext
- 8) / 0.022
IFC 090 i-EEx IFC 090 i-EEx
hazardous area hazardous area
safe area or safe area or
hazardous area ( * ) hazardous area ( * )
3 Pulse output P
active
4 Pulse output P
passive
Version: Ex-i5 Versions: Ex-i1, Ex-i4, Ex-i6, Ex-i8
U
int
= 20 V DC U
ext
= 6 - 30 V DC
R
int
= 260 Ω I
max
≤ 110 mA
U
L
= 20×R
L
/ (260+R
L
)
IFC 090 i-EEx IFC 090 i-EEx
hazardous area hazardous area
safe area or safe area or
hazardous area ( * ) hazardous area ( * )
passive counter passive counter with
external supply
( * ) Important note: Only if the measuring devices are also explosion protected