Electrical connection
Waterpilot FMX21
30
Hauser
6.5.2
TMT72 temperature head transmitter (optional)
• Max. current consumption: ≤ 23 mA
• Min. current consumption: ≥ 3.5 mA
6.6
Connecting the measuring unit
6.6.1
Overvoltage protection
To protect the Waterpilot and the TMT72 temperature head transmitter from large
interference voltage peaks, Hauser recommends installing overvoltage protection
upstream and downstream of the display and/or evaluation unit as shown in the graphic.
1
3
4
3
4
5
5
5
5
5
5
5
6
6
6
2
A
B
B
C
2
A0018941
A
Power supply, display and evaluation unit with one input for Pt100
B
Power supply, display and evaluation unit with one input for 4 to 20 mA
C
Power supply, display and evaluation unit with two inputs for 4 to 20 mA
1
Device
2
Connection for integrated Pt100 in the FMX21
3
4 to 20 mA HART (temperature)
4
4 to 20 mA HART (level)
5
Overvoltage protection, e.g. HAW from Hauser (not for use in hazardous areas.)
6
Power supply
Further information on the TMT72 temperature head transmitter for HART
applications from Hauser can be found in the Technical Information
TI01392T.
Summary of Contents for Waterpilot FMX21
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