Hello, the output end needs to be protected against reverse connection when connected to 24V power supply. A diode D01, 1N4148, is connected in series in the channel. Is this connection feasible and has any effect on current output? Please give us an answer. Thank you
Hi Fenqiang,
Is this connection feasible and has any effect on current output?
The image below is a recommended protection scheme against EMI, overvoltage and reverse voltage protections etc.. The current transmitter, 0-20mA/4-20mA loop has to compete from Vloop to GND path, and can not be blocked by a diode. Please see the enclosed application note.
2-wire 4-20mA Transmitter, EMC/EMI Tested (ti.com)
I am enclosing a Tina simulation as an example for your reference.
XTR111_0-10V_to_0-20mA 02072023.TSC
If you have additional questions, please let us know.
Best,
Raymond
