KROHNE H250 M40 ATEX II2D Ex t-II2G Ex d EN - Manual (Page 16)

4
ELECTRICAL CONNECTIONS
16
H250 M40
www.krohne.com 07/2012 - 4002069601 - MA H250/M40-Ex-II2GD-AD R01
4.4 Grounding and equipotential bonding
The signal converter shall be connected to the equipotential bonding system of the hazardous
area via the internal or external grounding connection on the signal converter housing. The
measuring unit and the signal converter are electrically connected via an equipotential bonding
connection.
Any existing cable shields should be connected to earth according to applicable installation
regulations (EN 60079-14). A terminal connection in the terminal compartment permits a short
way earthing of the cable shields.
Alternatively, the equipotential bonding of the signal converter can also take place by way of the
measuring tube incorporated into the equipotential bonding of the hazardous area.
The measuring tube can be incorporated into the equipotential bonding system of the hazardous
area using the U-clamp mounted on the flange if present, or suitable conductive connections
(seals, etc.).
1 Grounding connection in the indicator
2 External grounding connection
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