Re: reversing a 12v line - number of relays?

[<xslash@xxxxxxx>]

Frank

thanks for a quick response

I have a load of single pole relays available (i assume single as they have
3
terminals, a,b&c. With out power a&b are connected. With power
b&c are
connected). I was wondering if my thinking was correct. I assume using 2 of
these would be the same as a double pole relay

Ade

Quoting Frank Mc Alinden <fmcalind@xxxxxxx>:

> Hi Ade
>             I think you only need two.......One for on / off and the
> other for direction changing...The direction relay would have to be a
> double pole change over...If the direction relay  is off say and the
on
> / off is turned on then the device clamps, goes forward ,up or
> whatever...If the direction relay is energised the device unclamps
,goes
> rev ,down or whatever....Depending on what your using it for it might
be
> better ti have the on / off disabled when changing direction........I
> can do a schematic and email it in pdf if you wish ??? Let me know
>
> Frank
>   ----- Original Message -----
>   From: xslash@xxxxxxx
>   To: ukha_d@xxxxxxx
>   Sent: Tuesday, June 03, 2003 4:34 PM
>   Subject: [ukha_d] reversing a 12v line - number of relays?
>
>
>   Hi
>
>   I have an 12v actuator that to reverse its action needs the voltage
> reversed.
>   I'm going to be using comfort to drive relays to do this and as far
as
> i can
>   see, i'll need 3 relays (1 to turn off/on the power, the other 2 to
> reverse the
>   12+ and gnd). Does this sound correct or is their an easier way to
do
> this?
>
>   thanks in advance
>
>   Ade
>
>



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