Activity Forums Questions & Troubleshooting 24V 4-20mA industrial temp sensor, how to connect/read? Reply To: 24V 4-20mA industrial temp sensor, how to connect/read?

  • Grimmie

    April 2, 2021 at 8:52 pm

    Hi Friedl,

    Thank you for your reply.

    I must admit that I did see minimum supply voltage @8v for the sensor. I ignored that for convenience sake. Because the readings did change with the temperature I asumed the sensor still worked, furthermore @100C the voltage would have been well over 8v, but the reading did not change significantly.

    That being said, you might be right this is an issue. I do however not see how using the Maxi Automation in 0-10v with 500ohm resistor would help my situation, am I missing something?

    The more I think about it I start to see this sensor simply isn’t suited for 4-20mA to 0-10v conversion. Because of it’s two wire construction, the power supply and signal share the same wires.

    Perhaps I should try again with a 3 wire sensor, where power and signal are separated.