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Hello everyone!
Don't know if this is the right forum t o discuss this topic, sorry if i am wrong.
According to Collin Wells' blog , when using chip like XTR116, I can't connect sensor GND to Vloop GND. (https://e2e.ti.com/blogs_/b/precisionhub/archive/2014/12/09/part-2-two-wire-4-20-ma-transmitters-background-and-common-issues)
But in my design, I use the 'High-Side' method to ensure the load is shorted to GND, so R_shunt is connected to Vloop(+), left sensor GND connect to Vloop(-).
How can i solve this problem that Collin mentioned above? Can I simple add a resistor between Vloop(-) and sensor GND so to lift up a potential? Does this way work?
Thanks!
Hi Collin,
I notice the 25 Ohms resistor there, and I think this also means the Rshunt can be anywhere along the loop.
I'll built the circuit and update the result later, thank you very much!