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

Levelflex M FMP41C with FOUNDATION Fieldbus
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
Standard, EEx ia, IS Plastic M20x1.5
EEx em, EEx nA Metal M20x1.5
Cable entry
Fieldbus FOUNDATION 7/8" plug
Terminals
for wire cross-sections of 0.5...2.5 mm
Supply voltage
The following values are the voltages across the terminals directly at the instrument:
Type
standard
EEx ia (FISCO model)
EEx ia (Entity concept)
Current consumption
Approx 13 mA for the range of voltages given above.
Overvoltage protection
If there is the risk of differences in potential forming when installing the Levelflex M to measure the
level of flammable liquids, the device can be fitted with a T12 housing and integrated overvoltage
protection (600 V gas tube surge arrester), see Ordering structure on → Page 8 ff.. This overvoltage
protection meets the requirements of DIN EN 60079-14, test standard 60060-1, and also protects
the device (10 kA, impulse 8/20 µs).
Type Clamping area
5...10 mm
7...10.5 mm
2
Terminal voltage
minimum
9 V
9 V
9 V
Wiring
maximum
32 V
17, 5 V
24 V
25