Relay Logic Part 1: The Basics

[randomdod]

Best explanation out of all the videos I've watched so far...was getting worried that i wasn't able to grasp onto the concept. Thank you!

[chawkzero]

This is really neat! I had no idea this sort of control circuitry could be built with relays and switches. Looking forward to more :D

[NERDfirst]

This is super clear and easy to understand. Thank you very much!

[venkateshk]

Very good explanation, easy to understand thank you

[TotemLofi]

Thanks very helpful, subscribed! Any more PLC help relay logic, ladder logic appreciated!

[humanbeing]

Great deathless
It requires quit more details like while Rung 1 is activated, how rung 3 is recieving supply by activating Coil.

[alexjohn]

Great. You can also use arrows to represent current flow instead of colors

[ELSolare]

Շնորհակալություն լավ բացատրելու համար :) thumbs up!

[abdullahjhatial]

how r Normally open switch at rang 2 is gonna closed by push button in rang 1 ? in latching relay. Even though we are not gonna energies normally open switch so how push button energies it even push button at rang 1 ?

[rpstarcruiser]

Very good instructional video. Will be using it in my training. Thanks!

[experiencingtechnicaldiffi]

I used to repair pinball machines where I had to analyze a complex ladder diagram to figure out which contact was at fault. Often only a wiring diagram was available and I had to develop my own logic chart from it. I didn't know at that time they were called ladder diagrams, but since I had studied Boolean algebra they weren't too difficult. It is amazing the level of complexity that can be achieved with 8 relays and 6 switches.
Mike (o\!/o)

[antonio_g]

i will have to watch this a dozen times in order to understand it

[peterkevintaylor]

How can you do xor for more than 2 relays. Is that even possible?. Would need to be able to do it for 10. But seems impossible.

[karlramberg]

Why is everything called R1 ? It makes it extra confusing. Is it that a relay is all of those things combined ?

[DAMN__________]

is that not the symbol for a cap? someone enlighten me

[theobserver]

How can i customize a contactor in order to get a logic gate?

[savanjoshi]

my final year project is automatic load sharing and source selection based on load using PLC and scada please guide me how the ladder diagram is

[whtwolf]

It really doesn't help that you named like 3 things R1

[MickeyD]

Are you slow? Do you even know what a capacitor is? And why is EVERY component labeled R1?

[protoborg]

Small problem with your first ladder diagram. The symbols are completely wrong. That's not how a coil is shown. That is not contacts. Those are not light bulbs. A coil is represented as a series of four little hills like half of a sine wave. That symbol with the two lines is a capacitor. When you cross it, it indicates that the capacitor is discharging. A bulb is shown most often as a diode emitting light, ie an LED. Further, the contacts associated with the coil are shown as small open circles at the ends of lines the lead away from the relay or switch. The normally open contact will be away from the arrow between the two contacts. The normally closed contact will be touching the arrow. You also completely missed how logic gates work.