KROHNE TIDALFLUX 2300 F Ex EN - Manual (Page 14)

3
CONNECTION DIAGRAMS
14
TIDALFLUX 2300 F
www.krohne.com 6/2013 - 7312442200 - AD EX TIDALFLUX 2300 - en - R02
3.3 Equipotential bonding
• As the Ex ia electrode circuits of the flow sensors are effectively grounded through the
conductive liquid in the measuring tube, an equipotential bonding system must exist over the
whole area in which the electrode circuits, including their wiring, are installed, conform
EN/IEC 60 079-14 clause 12.2.4.
• The flowmeter TIDALFLUX 2000, the electrode cable and the IFC 300 F / PF signal converter
must all be included in the equipotential bonding system of the hazardous area. If a single
separate conductor is used for equipotential bonding, than this conductor must have a cross
section of at least 4 mm
2 copper.
• The separate equipotential bonding conductor between flow sensor and converter can be left
out, if by other means (e.g. over bonding conductors over the metal piping system) a high
level of assurance that potential equalization exists between flow sensor TIDALFLUX 2000
and converter IFC 300 F / PF is reached.
3.4 Signal cable connections
Figure 3-3: Connection diagram for signal cable type A (DS)
1 Connection box of converter
2 I/O connection box of sensor
3 Connection box of sensor
4 Connect the outer screens via strain reliefs