RE: 2-Wire 4-20mA Sensor Transmitters: Sensor and Transmitter Current Consumption Limitations (Part 3)

Collin Wells — Tue, 04 Sep 2018 11:10:37 GMT

Hello,

I'm glad you enjoyed the blog series.

With >200mA peak output current requirements I'm not sure you're going to be able to find a way to get your design to work on a 2-wire loop. Consider desiging a 3-wire or 4-wire sensor transmitter to support designs requiring significantly more current than what is possible on a 2-wire loop.

RE: 2-Wire 4-20mA Sensor Transmitters: Sensor and Transmitter Current Consumption Limitations (Part 3)

user3650567 — Mon, 03 Sep 2018 03:48:24 GMT

Dear Collin Wells, first of all I would thanks for your series introduction about 2-wire 4-20mA blogs, it is very helpful! Here I have a puzzle in my developing a level transmitter with a sensor. The sensor include a DSP and RF parts and power consumption like this:

DPS_ Peak current=76.1mA Voltage=3.3V and the peak time=13ms;

RF chip _ Peak current=210mA Voltage=3.3V and the peak time=4ms;

Do you think with this sensor power consumption can develop a two wire transmitters?the measure frequency of the transmitter is not very high.

Any suggestions?

Thank you very much beforehand!