Endress+Hauser Waterpilot FMX21 - Connecting the Measuring Unit

Waterpilot FMX21 Electrical connection
Endress+Hauser 27
6.7 Connecting the measuring unit
6.7.1 Overvoltage protection
To protect the Waterpilot and the TMT182 temperature head transmitter from large
interference voltage peaks, Endress+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 Waterpilot FMX21 HART
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 Endress+Hauser (not for use in hazardous areas).
6 Power supply
Further information on the TMT182 temperature head transmitter for HART
applications from Endress+Hauser can be found in the Technical Information
TI00078R/09/EN.
6.7.2 Connecting the Commubox FXA195
The Commubox FXA195 connects intrinsically safe transmitters with HART protocol to the
USB interface of a computer. This enables remote operation of the transmitter using the
Endress+Hauser operating program FieldCare. The power is supplied to the Commubox via