Is this a plausible wiring diagram for a 12V DC timer?

[doive1231]

Hi,

I want to wire up a 12V DC timer (CN101A) to turn an appliance on and off. I have the found on the internet the following wiring diagram for the timer and not being too experienced I was wondering whether it will work if I make the connections as shown:


The timer does not show + or - so I am assuming the author has successfully identified the correct terminals and completed the circuit.

However, I have found a wiring diagram for the same timer for 240V use that I think is wired differently with two wires connected on the red (outside) switch connection.



Which diagram is correct?

Thanks for any help.

 

[tazz]

I would used a electronic stat with lead sensor, the fridge will be at the temperature you require then

 

[Darkwood]

Has no-one noticed the first diagram shows a supply 12v AC........ check out the waveform symbol in brackets... you DC supply from the battery may not work although some power supplies are not waveform conscous and will work off either.

Here's an easier diagram to follow but do note the pic is reversed from yours.

 

[guinnessgixer]

I would of thought if there is no stat on the fridge, the compressor and system isn't powerful enough to freeze anything even running constantly?? surely it would be a hazard to health??

 

[FrankUK]

Just use a replacement fridge stat by Ranco. These are specially made for the job. The Varifix range. Ranco Varifix Service Thermostats

You can buy these off the shelf from any local fridge wholesaler, such as Climate Centre, FSW, HRP, Dean & Wood etc. They are also available off ebay.

They are a temperature switch, so will switch whatever voltage you have in your compressor control circuit.

They make about 10 different versions for different applications, i.e. high temperature, freezer, bottle fridge etc. Just make sure you tell them exactly what you want it for and they will select the correct model.

 

[FrankUK]

Has no-one noticed the first diagram shows a supply 12v AC........ check out the waveform symbol in brackets... you DC supply from the battery may not work although some power supplies are not waveform conscous and will work off either.

Here's an easier diagram to follow but do note the pic is reversed from yours.

I noticed the RMS waveform symbol and thought it better to post the information above, as this may prove to be more helpful.

 

[rwyndavies]

I found that this wasn't working for me for some reason. Its annoying that no instructions were provided, yes, in 12v the timer merely acts as a switch to interrupt the positive.
I'm powering both the timer and load from 12V, I found this youtube vid that resolved it. Although its a different model timer, the terminals & connections are the same. Very clear & concise:

https://www.youtube.com/watch?v=6peve0fa1wU