Question

Hi,

the output doesn't work for me. I set the outpusignal to high, but when I measure with the multimeter I get 0V.

greetings Jochen

Answer 1

Hello,

TRB140 and other devices output only works as a switch and it cannot provide voltage to power connected device.

Comments

Ok wouldn't be a problem. But where is the voltage connected to be switched?

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Hi,

Check this RUT2 example https://wiki.teltonika-networks.com/view/RUT2xx_Connecting_relay_to_open_collector_output, since TRB140 output uses same OC circuit basic idea is the same and only difference is that user can configure which TRB140 pin will be an output.

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Thank you very much. The output simply switches through the minus for a separate relay.

Thanks for your help.

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I connected a led with resistor this way. if output is set to high level, the output pin is set to gnd and difference is ~vcc. but if output is on low level, the voltage between vcc and output pin is still around 2v an the led shines a bit. why is this?
and can anybody tell what maximum input voltage is ok if pin is set to input?