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PostPosted: Fri Feb 15, 2019 1:40 am 
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We have got 2 fans in the workshop running full time through a SMSCOM fan controller, problem at the moment is too cold at night when the heating is off, drawing in freezing outside air, so wanting the input fan turned off on a switch and output fan just drawing air in passive, then all back on in time for when we get in there in the morning. We have tried a plug in mechanical segment timer into the fan controller but it didn't work because the voltage from the fan controller is too low to run the timer (80v). Needs a seperately powered switch or relay to just knock the supply to the input fan on and off, if anyone can point me in the right direction of a suitable item I would be much obliged.

Thanks in advance,


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PostPosted: Fri Feb 15, 2019 5:23 am 
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You want a time switch with voltage free contacts.

Why not use an immersion heater time switch, most of them have volt free contacts. (or You could look for a dedicated timer on the RS components website)

Fret not, a forum is a collection of opinions. Above, are mine.

Which is correct? Metre or Meter? Click the link to find out more.

Working on anything electrical? have you got a multi meter? why not? Would you hit a nail with a shoe?

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