Re: SPDT remote controlled switch?
- From: "D&SW" <d&sw@xxxxxxxxxxx>
- Date: Thu, 22 Nov 2007 00:50:24 GMT
I use two PLC modules (X10 Appliance modules or "Universal" modules?) to
control two double throw or single throw relays. One relay switches power
ON and OFF and the other relay selects the motor or motor winding (drape
direction). Even if both relays energize, only one motor (or motor winding)
will be powered. The problem is, you will need some logic control to
determine which direction the drapes should be energized in.
"RickH" <passport@xxxxxxxxxxxxxxxxxxxxx> wrote in message
news:55b07181-30a8-4da2-a160-e88ef160abff@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Is there a SPDT PLC switch available? One that will absolutely
guarantee that both "throws" cannot become energized simultaneously.
I have drapes that have separate forward/reverse motors, currently
there is a simple hard-wired SPDT switch on the wall for open/off/
close, "Open" energizes the forward motor and "Close" energizes the
reverse motor. Obviously energizing both motors simultaneously would
quickly destroy the motors and the drapery pulls. So I need a PLC
switch with a true SPDT relay and 3 programmable "positions", IOW I
dont want to cobble togeter 2 SPST switches and risk having both
motors get energized simultaneously due to a communication glitch.
How can I convert this arrangement to PLC so I can have a remote
controlled drape?
.
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