Re: Industrial Latch Circuit control????

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jimlux-at-earthlink-dot-net>

That's pretty much the standard way...

Essentially the ON switch (NO) is wired across the NO contacts of the
relay..
The OFF switch (and the Estop) are wired in series.  Generally, you put the
OFF outside the parallel relay contacts and the switch, so that if you press
BOTH switches, the system doesn't go live.
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, July 26, 2002 4:59 PM
Subject: Industrial Latch Circuit control????


> Original poster: "Daniel McCauley by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <dhmccauley-at-spacecatlighting-dot-com>
>
> I have two military 800T type illuminated pushbuttons I want to use as my
> enable / disable controls for my tesla coil.
>
> What are your ideas for using momentary switches for a relay latch
circuit.
>
> My current idea is:
>
> The ENABLE pushbutton is inline between 115VAC and the input 115VAC on the
> relay and is wired for normally open.
> The DISABLE pushbutton is wired between the output of the relay  and the
> input 115VAC on the relay and is wired for normally closed.  There will
also
> be a normally closed E-STOP mushroom button (opened when pushed) between
the
> output of the relay and the tesla coil.
>
> So when you push the ENABLE pushbutton the relay switches on and the relay
> output is now 115VAC and is looped backed to
> the input 115VAC on the relay so when the ENABLE is released, the relay is
> latched through itself.
> When you press the DISABLE pushbutton, you break the 115VAC going to the
> input of the relay and turn it off.
>
> Thanks
> Dan
>
>
>
>