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Questions &/or issues related to products in the Flex / Force category should be posted in this forum. includes Force Sensitive Resistors, Load Cells & Amplifiers, Pressure Sensors, etc
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By Walkir
#207798
I would like to connect a load cell to a PLC.

PLC I am using has analog input (current 4-20mA or voltage 0-5V).
Because of the resolution, I would prefer to use the current input.

Another way of communicating would be RS485 or RS232.

I can see a lot of hardware available here but I am not an electronics guru so I got a bit lost, could you help me out to find the best solution?
User avatar
By TS-Chris
#207803
Hi Walkir, and thanks for your post.

You're going to need a load cell amplifier between the load cell and your PLC. Load cells output a very tiny voltage that needs amplified up to a point where you can measure it.

If you're looking for a 4-20mA or voltage output, you're going to need a load cell amplifier with an analog output. Sadly, we only carry load cell amplifiers with a digital output and those won't work with your PLC.

Something like one of these set to 4-20mA output mode would likely work for you.
By brow
#208073
TS-Chris wrote: Wed Sep 18, 2019 1:19 pmIf you're looking for a 4-20mA or voltage output, you're going to need a load cell amplifier with an analog output.
Note that this sort of amplifier is often called a load cell (or scale) transmitter.
User avatar
By TS-Chris
#208454
Hi brow!

That looks like it would be perfect for Walkir's needs. Thanks for sharing!