Endress+Hauser Waterpilot FMX21 - Current Consumption; Connecting the Measuring Unit

Waterpilot FMX21 Electrical connection
Endress+Hauser 29
6.4.2 TMT182 temperature head transmitter (optional) for FMX21 4 to 20 mA HART
≤ 0.805 W at 35 V DC
6.5 Current consumption
6.5.1 FMX21 + Pt100 (optional)
Max. current consumption: ≤ 23 mA
Min. current consumption: ≥ 3.6 mA
6.5.2 TMT182 temperature head transmitter (optional) for FMX21 4 to 20 mA HART
• 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 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.