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?