KROHNE PROFIFLUX IFS 5000 EN - Manual (Page 9)

9
Supply power > 50 V AC
•
Grounding is via the PE protective ground conductor incorporated in the power supply
cable, see also Section “Connection to power” in the installation and operating instructions
for the signal converter.
• EXCEPTION: Do not connect up the PE protective ground conductor in the terminal
box if e.g. compact units are operated in the proximity of electric furnaces, electrolysis
plants, etc., and large potential differences occur in the pipeline system. An FE functional
ground must simultaneously take over the function of the protective conductor (combined
protective/functional ground). Refer to appropriate national codes for specific requirements
for this type of installation, which may require the addition of a ground fault detection
circuit interrupter.
Power supply 24 V AC or DC
•
Protective separation (PELV) must be ensured (VDE 0100/VDE 0106 or IEC 364/IEC 536
or equivalent national regulations).
• An FE functional ground conductor must be connected for measurement reasons.
Compact systems
D1/D3 Gaskets glued to measuring tube.
D2
Gaskets not included in supply, to
be provided by customer.
Use standard flat gaskets, dimensions
see Sect. 11.
E Grounding rings (option) with glued-
on gaskets D2, supplied loose and must
be screwed to the housing.
E / D1 Grounding rings, screwed to housing,
with inserted gaskets D1,
special O-rings.
FE Functional ground, conductor
≥
4 mm 2 Cu/AWG 10.
PE Protective conductor, required if the
IFS 5000 F is operated with a signal
converter that supplied a field current of
> 125 mA / > 60 V.
R Pipeline
RF Pipe flanges
V Interconnecting wires, bolted to
housing.
Y Terminal box or signal converter.
Metal pipelines,
with or without internal coating,
and plastic pipelines
grounding with grounding rings
Metal pipelines,
not internally coated
grounding without grounding rings
DN 25 - 100 / 1” - 4”
DN 2.5 - 15 /
1
/ 10
” -
1
/ 2
”
R R
V* V*
RF RF
D2 D2
E E
D1 D1
R R
RF RF
D2 D2
E/D1 E/D1
FE (PE)
FE (PE)
R R
V V
RF RF
FE (PE)
D3 D3
Grounding diagrams
Y Y
Y
V* not required for plastic pipelines