delay cutoff circuits....
delay cutoff circuits....
(OP)
Hi im designing a circuit that will eventually allow us to control a motor via a switch that when activated will shut the motor down after 5 seconds if the switch is held open and will then stay shut down untill another push button is hit.
so far i have come up with an RC circuit that works well but im having issues with isolating the RC control circuit from the motor contactor becaure of the inductor
I am interested in wether a Solid state relay would work for this or do they have inductance on the control side?
help !
so far i have come up with an RC circuit that works well but im having issues with isolating the RC control circuit from the motor contactor becaure of the inductor
I am interested in wether a Solid state relay would work for this or do they have inductance on the control side?
help !





RE: delay cutoff circuits....
I don't know if this will help but I have used an optoisolator in the past to separate the relay coil from the control circuit.
See tutorial on relay drive designs and a little history on relays
http://www.uoguelph.ca/~antoon/gadgets/relays/relays.ht...
RE: delay cutoff circuits....
RE: delay cutoff circuits....
so a SSR is an optoisolated voltage controlled voltage source with very little input impedance?
if so then thst would be perfect.
RE: delay cutoff circuits....
http://www.ciicontrols.com/products/ssdadwg.htm
for SSR schematic. Please, notice that the SSR control voltage may be AC and DC. Each one can accept an RC timing circuit.