Question

How do we know which relay contact is actuated by which relay coil? How does this convention differ from that of standard electrical/electronic schematic diagrams, where the relay coil is shown as an actual coil of wire

Answer 1

A relay is a special type of switch turned on and off by an electromagnet, When a current flows through the coil an electromagnetic field is set up. The field attracts an iron armature, whose other end pushes the contacts together, completing the circuit.A relay is an electromagnetic switch operated by a relatively small electric current that can turn on or off a much larger electric current. The heart of a relay is an electromagnet. While an actuator acts as a device which helps to bring about necessary mechanical movements. Relays are used instead of switches because of several of their advantages over the mechanical switches. In Standard electrical/electronic logic diagrams, relay coils are associated with their respective contacts by name rather than by proximity. Many students find it confusing that relay contacts and coils need not be drawn next to one another in Standard electrical/electronic logic diagram, because it is so different from the schematic diagrams they are accustomed to. The non-necessity of proximity in a Standard electrical/electronic logic diagram does have its advantages, though! It is simply a matter of getting used to a new way of drawing things.