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6.4 Functional earth connection.
To ensure trouble-free operation the device must be connected to an earth
potential free from external voltage�
6.4.1 Mounting on DIN rail
The connection is made automatically via the DIN rail� Note that the DIN rail must
be connected with the earth potential�
6.4.2 Mounting plate
When the device is fixed on a mounting plate, connection is made via the left fix-
ing screw� Note that the plate must be connected with the earth potential�