Form C (or changeover/CO) relays have a set of normally open contacts and a set of normally closed contacts. When the relay is not energized,…
What are the major types of electromechanical relays?
General Purpose Relays General purpose relays are cheap, easily replaceable, and are used for troubleshooting and other low priority switching applications. These relays follow a…
How does an electromechanical relay work?
An electromechanical relay uses a physical moving part to connect contacts within the output component of the relay. The movement of this contact is caused…
When was the electromagnetic relay invented?
Although there were several precursors that could be considered relays, the invention of the electromagnetic relay is attributed to Joseph Henry in 1835. Henry’s original…
What are relays?
A relay is a switch powered by a relatively small electric current that can turn a much larger electric current on or off. Essentially, relays…