KROHNE IFC 010 Converter Short EN - Manual (Page 3)

IFC 010 3
1 Electrical connection: power supply
1.1 Important installation notes
1.1.1 Location Electrical connection in accordance with VDE 0100 ”Regulations governing heavy-current installations with
line voltages up to 1000 V” or equivalent national regulations.
Do not cross or loop cables inside the terminal compartment.
Use separate cable entries (see below) for power supply, field current cables, signal lines, outputs and inputs.
Protect flowmeters or switchgear cabinets with built-in devices from direct sunlight. Fit a sunshade if necessary.
When installed in cabinets, signal converters must be adequately cooled, e.g. use fans or heat exchangers.
Do not expose signal converters to intense vibration.
1.1.2 Only for separate
systems/signal converters
(W versions) Keep distance between flow sensor and signal converter as short as possible. See Sect. 1.3.4 for maximum
permissible length of signal and field current cables.
Use the supplied KROHNE signal cable A (Type DS), standard length 5 m (16 ft).
Always calibrate flow sensor and signal converter together. Therefore, when installing, ensure primary
constant GKL is identical; see instrument nameplate for the flow sensor. If the GKL is not identical, set the
signal converter to the GKL of the flow sensor. Refer also to Sections 4.
1.1.3 Cable entries
NOTE:
Ensure gaskets are fitted correctly and maintain the following max. torques!
1 Max. torques for M 20,
1/2" NPT or 1/2" PF adapters: 4 Nm / 2.8 ft × lbf
2 Max. torques for M 20 only: 3 Nm / 2.1 ft × lbf
3 Gasket
A) M 20 cable entries
These cable entries may only be used for flexible electrical cables if the relevant electrical regulations so allow,
e.g. National Electric Code (NEC).
Do not fix rigid metal conduits (IMC) or flexible plastic conduits to the M 20 cable entries, refer to “Point B, C”
below (1/2” NPT or PF adapters).
B) ½" NPT adapters C) ½" PF adapters
For most North American systems the regulations require that electrical conductors be laid in conduits,
particularly for power voltages > 100 V AC.
In such cases, use the 1/2" NPT or 1/2" PF adapters to which flexible plastic conduits can be screwed. Do not
use rigid metal conduits (IMC)!
Lay conduits such that no moisture can penetrate into the converter housing.
Should there be risk of any condensation water forming, inside cross-section of the conduit around the cables at
these adapters with a suitable sealing compound.
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