KROHNE OPTIFLUX 2000-4000-5000-6000 -IFC 100 Ex EN - Manual (Page 16)

3
CONNECTION DIAGRAMS FOR FIELD VERSIONS
16
OPTIFLUX
www.krohne.com 04/2009 - 7.30685.22.00 - EX IFC 100 en
In the case of field versions, the electrical connection between the sensor and the signal
converter is established via a signal cable and a field current cable.
The field current cable
field current cable field current cable field current cable is no part of the supply and must be supplied by the user. It must be
according EN 60079-14 clause 9.3 and 11.3 (Increased safety).
The signal cable
signal cable signal cable signal cable is part of the supply.
3.1 Signal cable A
The signal cable A is a double screen shielding cable, according to EN 60079-14 clause 12.2
(Intrinsic safety).
Figure 3-1: Construction of signal cable A
1 Stranded drain wire (1) for the inner shield (10), 1.0 mm 2 Cu / AWG 17 (not insulated, bare)
2 Insulated wire (2), 0.5 mm
2 Cu / AWG 20
3 Insulated wire (3), 0.5 mm 2 Cu / AWG 20
4 Outer sheath
5 Insulation layers
6 Stranded drain wire (6) for the outer shield (60)