FTS 21216, Руководство по эксплуатации

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700-SDI-RADAR-LX-80-Man Rev 1 08 Oct 2021 9 /49
loggers, or data concentrators. The signal range and function for 4 – 20 mA analog output can be
configured in the setup application so the sensor will be able to signal the best suitable value range
with the available current range.
The sensor’s current step has a limiting resolution of 0.3 μA. Ensure the minimal and maximal
values representing 4 mA and 20 mA have sufficient resolution for system requirements.
Figure 3-2: Analog 4-20 mA internal architecture
Measurement of the current by the client device (logger, PLC, modem etc.) must be implemented as
the high side current measurement as shown in figure 3-3. If a sensing resistor is used, resistance
should be selected from the range 10Ω to 500Ω, with a recommended value 100Ω for the sensing
resistor.
Figure 3-3: High side current measurement for the 4-20 mA analog output