Contents
How do I choose a relay module?
Consider these factors when choosing a relay for use in industrial controls:
- Voltages driving loads are the first concern. The voltage rating of a relay must be greater than or equal to the voltage driving the load.
- The current required depends on the type of load. Most loads don’t draw a constant current.
What is a 2 way relay?
The relay has two outputs-normally open and normally closed (NO and NC). Connecting a circuit or device between one of these two pins, the common pin on the relay output, and a power source will allow you to toggle power to a circuit or device.
What happens if you put a relay in backwards?
Often seen as a quick fix, using the wrong relay for the application can cause inadvertent voltage spikes. Many relays, if installed for the wrong application, could and will cause a short (Internal Relay Circuit) and most likely cause functionality issues or even damage to the vehicle computer systems.
How to connect a 5V relay to the ground?
Connect an LED and 220 ohm resistor in series between the NO pin (the right pin) on the terminal block on one of the relays and ground, then connect a 5V power source to the common pin (the left pin) on one of the relays. Nothing will happen (yet).
Why is a mini relay called a make and break relay?
Relay terminology The ISO mini relay we have looked at above has 4 pins (or terminals) on the body and is referred to as a make & break relay because there is one high current circuit and a contact that is either open or closed depending upon whether the relay is at rest or energised.
What can you do with two channel relay?
Connecting a circuit or device between one of these two pins, the common pin on the relay output, and a power source will allow you to toggle power to a circuit or device.
Which is smaller ISO micro relay or ISO mini relay?
ISO micro relays are, as the name suggests, smaller than ISO mini relays and designed for use in applications where space is at a premium.