Connecting The Measuring Unit - Endress+Hauser Levelflex M FMP41C Operating Instructions Manual

Levelflex M FMP41C PROFIBUS PA
Endress+Hauser
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
Type
Standard, Ex ia, IS Plastic M20x1.5
Ex em, Ex nA Metal M20x1.5
Terminals
For wire cross-sections of 0.5 to 2.5 mm
Cable entry
• Cable gland: M20x1.5 (only cable entry for Ex d)
• Cable entry: G½ or ½NPT
• PROFIBUS PA M12 plug
Supply voltage
The following values are the voltages across the terminals directly at the device:
Type Terminal voltage
standard 9 V to 32 V
Ex ia (FISCO model) 9 V to 17.5 V
Ex ia (Entity concept) 9 V to 24 V
Supply voltage 9 V to 32 V
Lift-off voltage 9 V
1) There may be additional restrictions for devices with an explosion protection certificate. Refer to the notes in the
appropriate safety instructions (XA).
Current consumption
Max. 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 EN/IEC 60079-14 or EN/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 "Ordering structure", → ä 6
or
• this protection is achieved by the use of other appropriate measures (external protection devices
e.g. HAW562Z).
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.
Clamping area
5 to 10 mm
7 to 10.5 mm
2
1)
Wiring
23