KROHNE IFC 210 E-EEx EN - Manual (Page 55)

Part C Special applications, functional checks, service, and order numbers Sect. 6.1
05/2002 IFC 210 E 55
6.1.2 Electrical connection
The signal converter must be installed outside the hazardous area. If used inside the hazardous
area, type IFC 210E- EEx signal converters need to have additional type of protection (e. g.
flameproof enclosure “d”).
The electrical connection of all circuits leading into the device is carried out using plug-in
connectors in conformity with DIN 41612, Style F. Type IFC 210E –EEx signal converters are
delivered with associated socket connectors with soldering tags. Operation is only permitted with
these socket connectors.
To ensure that the thread measure is min. 50 mm between the connections of the intrinsically
safe electrode circuit and those of the non-intrinsically safe circuits, all live connections on socket
connectors XA, XC, XD need to be insulated with shrinkdown sleeves. In this connection, non-
intrinsically safe circuits of adjacent subassemblies will also need to be taken into consideration.
Both generation of the ungrounded intrinsically safe electrode circuit and also fuse-protection of
the field current circuit by fusible cutouts are integral components of the IFC 210E-EEx signal
converter.
The connections for the intrinsically safe electrode circuit, including the shield connections,
are safety-separated up to a peak value of 375 V from the connections for supply power, for the
inputs/outputs and for the field current circuit, and are metallically separated from the housing
(PE/PA).
For connection of the intrinsically safe electrode circuit, including shield connections, to the
primary head, please refer to Point 12 in EN 60079-14.
Connect the non-intrinsically safe field current circuit to the primary head in keeping with the
requirements specified in Point 9 of EN 60079-14.
The non-intrinsically safe input and output circuits may only be routed into the hazardous
area taking relevant measures into account in accordance with EN 60079-14.
Important, please note!
•
All unused cores and shield ends of the power cables to be carefully
insulated from each other and from ground.
•
All shields to be joined to the shield terminals by the shortest route.
•
Undocumented terminals of all connectors to be left unused.
•
Please take note of details given in Sect. 1.3.3 and 1.3.5.
Rated insulation levels
The insulation of IFC 210 E - EEx signal converters is dimensioned in conformity with
VDE 0110/IEC 664 and takes into account the following ratings:
- overvoltage category for the power line circuit: III
- overvoltage category for the signalling circuits: II
- insulation contamination level: 2