Wiring
Micropilot M FMR250 FOUNDATION Fieldbus
30
Hauser
4.3
Recommended connection
For maximum EMC protection please observe the following points:
• The external ground terminal on the transmitter must be connected to ground.
• The continuity of the cable screening between tapping points must be ensured.
• If potential equalisation is present between the individual grounding points, ground the screening
at each cable end or connect it to the device housing (as short as possible).
• If there are large differences in potential between grounding points, the grounding should run via
a capacitor that is suitable for high frequency use (e.g. ceramic 10 nF/250 V
&
).
"
Caution!
Applications, which are subject to the explosion prevention, permit only under special conditions
the repeated grounding of the protective screen , see to EN60079-14.
4.4
Degree of protection
• with closed housing: IP65, NEMA4X (higher degree of protection e.g. IP68 on request)
• with open housing: IP20, NEMA1 (also ingress protection of the display)
• antenna: IP68 (NEMA6P)
4.5
Post-connection check
After wiring the measuring instrument, perform the following checks:
• Is the terminal allocation correct (
→
ä
26 and
→
ä
28)?
• Is the cable gland tight?
• If available: Is the FOUNDATION Fieldbus connector screwed tight?
• Is the housing cover screwed tight?
• If auxiliary power is available:
Is the instrument ready for operation and does the liquid crystal display show any value?
