How To Read A Relay Schematic

A trip output contact from one relay to the input coil of another relay.

How to read a relay schematic. Check for the complete loops that the conductors form which allow electricity to flow throughout the circuit. The transistor allows the hc11 to control the medium sized coil current of relay. The following schematic shows the basic circuit. Learning how to read and understand schematics will be easy for beginners with recognizing basic schematic symbols.

Here i am giving the standard symbols used for the electrical relay diagram in earlier days instead of plc or dcs like controllers relays are used as controllers. Nets nodes and labels. A normally closed relay will switch power off for a circuit when the coil is activated. 5 pin relay 5 pin relays provide 2 pins 85 86 to control the coil and 3 pins 30 87 87a which switch power between two circuits.

How to read relay wiring diagram wiring diagram is a simplified satisfactory pictorial representation of an electrical circuit it shows the components of the circuit as simplified shapes and the facility and signal friends amongst the devices. In one of the previous post in instrumentpedia i have described how to read an electrical drawing now lets look what is electrical relay diagram. Basic schematic circuit diagram of relay. Connect the relay with hc11 port pins this is used to control on switches.

Note that these lines represent conductors which are the different wires that make up the circuit. Understanding which components are which on a schematic is more than half the battle towards comprehending it. To read electrical schematics the fundamental electrical schematic symbols should be understood. Look around your schematic for horizontal and vertical straight lines in a variety of lengths and sizes.

A normally open relay will switch power on for a circuit when the coil is activated. Now all that remains is identifying how all of the symbols are connected together. This tutorial will turn a beginner into a fully learned schematic reader. Schematic nets tell you how components are wired together in a circuit.