I got an wind direction sensor that produces a 4-20mA output and it is powered by 12V. The troublesome part is that it ofc also produces the loop power (12V) witch seems to clash with your 4-20mA receiver, so is there a way to disable the loop power on the receiver end
the wind direction sensor is it a 2 wire current loop receiver sensor or a current receiver
To remove the on board supply you will need to remove a part and connect your 12V over here
{ remove the Diode ( part number B350A or B360A, and connect your wind direction sensor 4-20mA output across the 4.99Ohm resistance) this is a hack and will void your warranty}
With these kind of sensor, 4-20mA receiver board should be used
Thanks for the reply!
The sensor seems to be a current transmitter, and not a proper 4-20mA loop ie, 3 wire power, ground and signal. Power is +12V and the signal line has the same potential. putting a small resistor in series with the signal to ground, gives a proper output over the resistor.
So i will try the āremove diodeā trick , now to find the proper one.
(and no, iām not going to invest in a 64$ card, to only use one chanell)
Suggestion for improvement: add a jumper so that one can use an external power suply.
the wind direction sensor is it a 2 wire current loop receiver sensor or a current receiver
To remove the on board supply you will need to remove a part and connect your 12V over here
{ remove the Diode ( part number B350A or B360A, and connect your wind direction sensor 4-20mA output across the 4.99Ohm resistance) this is a hack and will void your warranty}
With these kind of sensor, 4-20mA receiver board should be used
This really, REALLY needs to be explicitly stated on the product page. I already bought them thinking they were just 4-20mA RECEIVERS like it says in the name: ā4-Channel 4-20 mA Current Loop Receiver 16-Bit ADS1115 I2C Mini Moduleā It only says this: āThis device include a voltage boost circuit to raise the 5V input to 16V for powering the INA196 current shunt monitoring chip.ā It says nothing about how the loop power supply is hardwired and cannot be disabled without āhackingā the board. It would be awesome if there was a jumper to disable it because externally powered loops in industrial environments are the norm, rather than the exception.