Phidgets to control 220V DC socket ?

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kris
Phidgetly
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Phidgets to control 220V DC socket ?

Postby kris » Mon Dec 06, 2010 8:13 am

Hi all !
I would like to know if there is a way to control a 220V DC socket with a phidget.
Let me explain my case :
imagine i have a T° sensor and a heater plugged into a 220V socket.
If T° < 15° then
do startHeater
fi
If T° > 30° then
do stopHeater
fi

Here is a scheme to explain :
Phidgets to control 220V DC socket.png
phidget 220V control
Phidgets to control 220V DC socket.png (68.54 KiB) Viewed 6007 times


Regards,

_Dejan_

Re: Phidgets to control 220V DC socket ?

Postby _Dejan_ » Mon Dec 06, 2010 11:30 am

Hi,
I think you are talking about 220V AC.
I think this is not big problem to do. you need only relay on phidget output.
If you have PC then buy cheapest board which have min 1 analog input and 1 digital output. If you don't have PC then is only option SBC. But for this small thing I don't think SBC is woth to buy you can make some electronic circuit cheaper...

Cerwell
Phidgeteer!
Posts: 58
Joined: Wed Nov 26, 2008 3:52 pm
Location: Norway (East)

Re: Phidgets to control 220V DC socket ?

Postby Cerwell » Mon Dec 06, 2010 2:41 pm

Make sure all components can handle the load of the heater.
This decreases your chance of burning down your house.

kris
Phidgetly
Posts: 33
Joined: Mon Dec 06, 2010 5:05 am
Contact:

Re: Phidgets to control 220V DC socket ?

Postby kris » Thu Dec 16, 2010 1:56 pm

Do you think 3051 relay board is suitable for that ?

I already have a 1018 interface kit

Regards,

erik
King of the Lab
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Location: Calgary, Canada
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Re: Phidgets to control 220V DC socket ?

Postby erik » Thu Dec 16, 2010 2:18 pm

If you do mean 220AC instead of 220DC, if the heater doesn't require more than 10A of current, the 3051 will be suitable.

kris
Phidgetly
Posts: 33
Joined: Mon Dec 06, 2010 5:05 am
Contact:

Re: Phidgets to control 220V DC socket ?

Postby kris » Fri Dec 17, 2010 7:58 am

Hi,

Yes you're right, i was talking about 220V AC

My next question is not about phydgets...but i don't know anything about electricity :
how can i be sure that my heater doesn't require more than 10A ?

And what about the load ? the heater uses 2000Watts...

Regards,

erik
King of the Lab
Posts: 476
Joined: Fri Mar 06, 2009 12:42 pm
Location: Calgary, Canada
Contact:

Re: Phidgets to control 220V DC socket ?

Postby erik » Fri Dec 17, 2010 10:49 am

Power = V * I

And so,
2000 = 220 * I
I = 9.09A.

That current is close to the maximum current rating for the relay. Depending on how long you keep the heater running, and how often you switch it on and off (ie, depends on the size of the room) the 3051 will be suitable. The 3051 will get warm, since it will have 9A running through it. You can try putting both the relays on the 3051 in parallel to share the 9A between two relays. You would have to switch both relays at the same time.

Cerwell
Phidgeteer!
Posts: 58
Joined: Wed Nov 26, 2008 3:52 pm
Location: Norway (East)

Re: Phidgets to control 220V DC socket ?

Postby Cerwell » Fri Dec 17, 2010 5:34 pm

@Erik: I'm sorry, but I dont think connecting two components in parallel in order to handle a expected load is a good solution.
If one component fails, the load will fall on the remaining component without further message. (Other than the overload slowly appearing).

My suggestion is to use a phidgets relay to control a larger relay suited for the load.

kris
Phidgetly
Posts: 33
Joined: Mon Dec 06, 2010 5:05 am
Contact:

Re: Phidgets to control 220V DC socket ?

Postby kris » Fri Dec 17, 2010 6:02 pm

@Cerwell : yes i was looking that way because 10A is too small for me.

Do you think i can directly connect to the 1018 board a relay suited for the load that will be able to command at a range of 4V - 32V (because 1018 has 5V terminal block) ?

regards,

Cerwell
Phidgeteer!
Posts: 58
Joined: Wed Nov 26, 2008 3:52 pm
Location: Norway (East)

Re: Phidgets to control 220V DC socket ?

Postby Cerwell » Sat Dec 18, 2010 12:16 pm

@Kris:
Using phidgets own 3051 in front of a larger loadhandler would be a good solution.
You could allso use a solid state relay from another supplyer.


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