HELP -> 4 to 20 mA sensor conection

Help & Support Robot Parts
1

I have the following product:

Product Code : RB-Ncd-21

1-Channel I2C 4-20mA Current Receiver Board w/ I2C Interface

Product Highlights
1-Channel input with 16-bit resolution
4-20 mA current loop receiver
Low-profile I2C mini module footprint
Ideal for sensor and instrument monitoring
Onboard 16V voltage supply (boosted from 5V)

My sensor

Dibujo
Dibujo733Ă—431 38.5 KB

Sensor cables
4-20mA IN (White)
4-20mA OUT (Green)
GND (Black)
+VCC (Red)

How do I connect the power source that the sensor requires?

   **Sensor cables**      **Product Code : RB-Ncd-21**        
4-20mA IN (White)   ----->    GND

4-20mA OUT (Green) -----> IN
GND (Black) -----> ??
+VCC (Red) -----> ??

or does it require an additional source for example of 12 V ??

How should I co-connect it with this product?

2

Hi @FrankGarza and welcome to the forum!

Yes, you should connect your sensor to external power supply. According to your specs, it should be in range of 9-30VDC.

3

Thank you for your reply.

Which option do you consider correct?

Option 1)

Dibujo_1
Dibujo_1958Ă—732 106 KB

or

Option 2)

Dibujo_2
Dibujo_2958Ă—732 203 KB

1 Like
4

I would choose option 1.

5

In the card features it says:

  • Onboard 16V voltage supply (boosted from 5V)

How can you connect the Onboard 16V voltage supply?

Instead of the external 12V source.

6

Hi,

This device includes a voltage boost circuit to raise the 5V input to 16V for powering the INA196 current shunt monitoring chip.

But I think it’s safer and easier for you to connect your sensor to external power source.

7

I have this device (the I2C interface) connected to my RPi3 and want to read it with “node-red-contrib-i2c” and there is literally no documentation that I have found to do this. Anyone have any ideas?