Levelflex M FMP40 with PROFIBUS PA Wiring
Endress + Hauser 39
4.2 Connecting the measuring unit
Ground connection
It is necessary to make a good ground connection to the ground terminal on the outside of the
housing, in order to achieve EMC security.
Cable gland
Terminals
for wire cross-sections of 0.5...2.5 mm
2
Cable entry
• PROFIBUS-PA M12 plug
Supply voltage
The following values are the voltages across the terminals directly at the instrument:
Current consumption
Approx 11 mA for the range of voltages given above.
Overvoltage protection
If the measuring device is used for the level measurement in flammable liquids which requires the
use of an overvoltage protection according to DIN EN 60079-14, standard for testprocedures
DIN IEC 60060-1 (10 kA, Puls 8/20 µs) it has to be ensured that
• the measuring device with integrated overvoltage protection with gas discharge tubes within the
T12-enclosure is used, refer to product overview on → ä 8
or
• this protection is achieved by the use of other appropriate measures (external protection devices
e.g. HAW262Z).
Connection with M12 plug
The Levelflex M PROFIBUS-PA sensor version with M12 plug is supplied ready wired and need only
be connected to the bus by means of a suitable cord set.
Type Clamping area
Standard, EEx ia, IS Plastic M20x1.5 5...10 mm
EEx em, EEx nA Metal M20x1.5 7...10.5 mm
Type Terminal voltage
minimum maximum
standard 9 V 32 V
EEx ia (FISCO model) 9 V 17, 5 V
EEx ia (Entity concept) 9 V 24 V
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