Comparing to other controllers it is very cheap. In earlier days instead of plc or dcs like controllers relays are used as controllers.
Understand Relay Specifications For Your Switching System
How to read relays. When a relay contact is closed there is a closed contact when the relay is not energized. Iso mini relays with two circuits one of which is closed when the relay is at rest and the other which is closed when the relay is energised have 5 pins on the body and are referred to as changeover relays. Relays switches are used to open and close circuits electromechanically or electronically. Behind the left or right kick panels or under the dash are common locations. Nowadays also for controlling small systems relays are using as controllers. Here we look at relay switch pin diagram and the different kinds of relay switches.
This ability helps to make the modern vehicles electrical system as efficient as it is. A relay is an electromechanical switching device when both power and ground are applied to the ends of a coil the relay activates which causes mechanical contact points to complete or open a circuit. It shows the components of the circuit as simplified shapes and the facility and signal friends amongst the devices. A reed relay is a type of relay that uses an electromagnet to control one or more reed switchesthe contacts are of magnetic material and the electromagnet acts directly on them without requiring an armature to move them. Relay blocks both large and small are located in the engine compartment. Here i am giving the standard symbols used for the electrical relay diagram.
One of the relays best features is its ability to use a very small amount of current to switch large amount of current. Reed switches have been manufactured since the 1930s. In one of the previous post in instrumentpedia i have described how to read an electrical drawing. In either case. Relays are often grouped together or with other components like fuses or placed by themselves. The operating voltage of a relay is generally in dcsmall signal relays and low voltage power relays are usually in dc but mains control relays and contactors quite frequently have ac coilsthe rest of the terminals of a relay are used to connect either a acgenerally 5060hz or dc circuit.
The switching and contact pins of the relay have their respective maximum voltage and current ratingsparameters. Electrical control circuits are drawn with the standard. Normally open relays are the more common type. A relay is a type of a switch that acts as an interface between microcontrollers and ac loads. Sealed in a long narrow glass tube the contacts are protected from corrosionthe glass envelope may contain multiple reed switches or multiple reed switches can be inserted into a single bobbin and actuate simultaneously. Now lets look what is electrical relay diagram.
Relays are located throughout the entire vehicle. These parameters are generally in scripted on the plastic or pvc case of the relayon. These have two contacts connected to a common terminal. When electrical current flows thought wire the wire has resistance which. 5v gnd normally open no normally close nc and common comm. How to read relay wiring diagram wiring diagram is a simplified satisfactory pictorial representation of an electrical circuit.
A simple single pole single throw spst relay like the one used in this project consists of 5 terminals. When a relay contact is open the relay is not energized.
Gallery of How To Read Relays
