Elgas EDT 101, User Manual

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3.4 Power Supply Requirements
The transducer is optimized for very low-power applications. It operates from unregulated
single supply voltage in range 2.8 V to 5.0 V. The supply current is independent from the supply
voltage.
The transducer uses an advanced algorithm to maintain the power consumption at a minimum
level. Only the modules of the transducer which are necessary for the requested function are
powered on. Due to the power consumption management, the supply current varies
significantly depending on the function being performed. Figure 5 shows an example of the
supply current profile. The first part shows a supply current waveform, when a simple query
is received, processed and responded back on the RS 485 bus by the transducer. The second
part shows a supply current waveform during measurement.
Mesurement
Standby
Transmitting response
Receiving query
Standby
Fig. 5 Supply current profile example.