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Sensors for Samba, Vision and M91 PLC


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Hi everyone

I have a problem with a sensor. It's a LDR sensor and I know that some PLC like Samba o Vision have RTD input. Is it possible read ohms with RTD input, or is it necessary to attach the sensor in a voltage divisor to read 0-10V analog input? 

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  • MVP 2021

Hi,

standard LDR sensor working resistance  50-100K.

Samba RTD input works with approx 100+- Ohm. 

Then you must use some external cirquit for convert LDR resistance to 0-10V or 0-20mA signal.

Something like

https://www.electronicscomp.com/ldr-light-sensor-module-india

can be used, but it powered by 5V DC and you can use only half of 0-10V  range.

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