1-Channel 4-20mA Current Loop Transmitter I2C Mini Module

Hardware
1

Hi

I purchased two modules : 1-Channel 4-20mA Current Loop Transmitter I2C Mini Module

I would like to interface them to ESP32-S2-SOLO board. where can i find a full labelled schematic as my i2c lines are 3v3.

Also the 4-20ma will be connected to a variable frequency drive - should i include the 250 ohm resistor ?

thanks
Jason

2

Hi Jason,

We do not supply schematics for these products.

If you power the 1 channel 4-20mA current loop Transmitter with 3.3VDC instead of 5 VDC then it will still work and it will use 3.3VDC on the SDA/SCL lines so it won’t cause any damage to the ESP32. Schematic isn’t really necessary as you simply need to connect 3.3VDC, GND, SCL, and SDA between the ESP32 and the mini module.

3

no you do not need 250ohm.