Re: Heating relays and CAT5 power

["Frank Mc Alinden" <frankmc@xxxxxxxxxxxxxxxx>]

Hi Simon

When i have to switch 240v i prefer to use Omron  "ice cube"
relays  as the
240v and low voltage are on seperate sides of the relay....check out the
link...Using a seperate  pair for each relay there should be no problem
driving them using cat5...cat5  i beilieve is rated at 300mA..
http://www.newark.com/product-details/text/catalog/79371.html

HTH
Frank


----- Original Message -----
From: "Simon McCaughey" <simonmcc@xxxxxxx>
To: "UK Home Automation List" <ukha_d@xxxxxxx>
Sent: Friday, October 27, 2006 7:10 PM
Subject: [ukha_d] Heating relays and CAT5 power


>I have finally got round to starting my heating control project using
the
> VIOM I got about 2 years ago!
>
> I have most of the software written, so it's time to turn to hardware
-
> couple of questions :
> 1) I am basically replacing the standard heating controls with a
relay.
> What
> sort of relay should I use? I see normal timers seem to be rated at
3A,
> would
> this do the job : http://tinyurl.com/y5afgh
>
> 2) The connection between the VIOM and the relay will be about 20
metres
> CAT5 cable. Will CAT5 carry enough power safely to power 3 relays? The
> coil
> on the above relay takes 37.5mA according to the maplin page. From
> googling
> it seems to be somewhere around 1A, so this should be absolutely no
> problem.
>
> Any advice or experience appreciated!
>
> Thanks
>
> Simon
>
> ---
> "I refuse to tip toe through life only to arrive safely at
death"
>
>
> [Non-text portions of this message have been removed]
>
>
>
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