KROHNE BM 100A ATEX EN - Manual (Page 10)

Section 3 - Electrical installation
BM 100 A ATEX 10/2001
10
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Independent of the type of supply power, the device must be incorporated in the equipotential
bonding system in the hazardous location. This can be done by way of an appropriately
conductive connection between the device flange system and the tank. If connection to the
equipotential bonding system is to be made via a separate conductor, this must be connected
to the outer press-fitted U-clamp terminal on the signal converter flange.
For device versions with intrinsically safe I/O functions (BM 100 A i), only certified intrinsically safe
equipment with the maximum values (see Type Test Certificate, Attachment A.2) may be
connected to the power terminals. This requirement also applies when the device is not operated
in the hazardous location!
3.4 Connection of supply power
For all BM 100 A variants, the power connection is not intrinsically safe.
Output
24 V AC/DC
FE
5 6 4 4.1 11 12
Output
N L
100-230 V AC
12
PE
5 6 4 4.1 11
Functional extra-low voltage with safety
separation (PELV). Connection of a functional
ground FE is not mandatory.
Low voltage