I have a Notifer  smoke sensor with external LED activation, with 5V output and max 5ma load.

I know that Logo D inputs start ON with more 8.5V, for that 5V are not enough to enalbe ON the port.

What is the best way for use 5V source and enalbe the Logo Digital Input port?

To use a NPN transistor or micro relay? ( max 5ma load)

thanks for the help

Domenik

I have a Notifer  smoke sensor with external LED activation, with 5V output and max 5ma load.

I know that Logo D inputs start ON with more 8.5V, for that 5V are not enough to enalbe ON the port.

What is the best way for use 5V source and enalbe the Logo Digital Input port?

To use a NPN transistor or micro relay? ( max 5ma load)

thanks for the help

 Hello,

 I would look more at an optocoupler than at a relay

You can use Analog threshold function.

Just put in Analog input and use Analog function to process output as you like.

...sent from App

ixo65

@ M111,

works only if he has a free 0-10V input available.

 True, I had value this 0-10v input possibility, but unfortunately all my analog inputs are usd for the pressure mb sensors.

i just buy one opto-relay 24v board, for sure this can work ( I have to test when arrive)

it cost only 5.5 euro for 4 channels )))

There are also amplifier board sold at 3 usd. on AliExpress. It can boost up voltage that can trick logic high for digital input of logo. Just another my idea...

...sent from App