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

["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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