User's Manual
Table Of Contents
- Table of contents
- Important document information
- Terms and abbreviations
- Registered trademarks
- Product life cycle
- Measuring principle
- Input
- Output
- Electrical connection
- Performance characteristics
- Installation
- Environment
- Process
- Mechanical construction
- Operability
- Certificates and approvals
- Ordering information
- Accessories
- Supplementary documentation
Micropilot FMR20
Endress+Hauser V. 5, Rev. 3, 20-12-2016 11
Power supply failure
The configuration remains stored in the sensor.
Connection FMR20, 4 to 20 mA HART
Circuit diagram / Description
FMR20 connection with HART
communication, voltage source and
4 to 20 mA display
2
3
Y
+ +
- -
I
1
mA
A0028908
3 FMR20 block diagram, HART
1 Micropilot FMR20
2 HART resistance
3 Power supply
The HART communication resistor of 250 Ω in the signal line is always necessary in the case of
a low-impedance power supply.
The voltage drop to be taken into account is:
Max. 6 V with 250 Ω communication resistor