Relay types

Are there ordinary delays and are they different from time delay relays?

by Hyzik
February 25, 2020

An "ordinary" relay closes its contacts the instant the coil is energized (within a ms. or two). Time delay relays may be time delay close (tdc) or time delay open (tdo). A tdc relay closes its contacts a set time after the coil is energized; a tdo relay opens its contacts a set time after the coil is de-energized. In both cases the time delay is normally adjustable. This description applies to normally open contacts; of course if the contact is normally closed the action is reversed.

by Foxx
February 27, 2020

Thanks so much @Foxx

by Hyzik
February 28, 2020

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