Originally Posted by kenh
I went through this entire thread and I don't understand - what is DIN?
DIN stands for Deutsches Institut für Normung or in English German Institute for Standardization.
Every time a hombrewer talks about DIN mounted components they talk about electrical parts which fit on a standard 35 mm DIN-rail.
It doesn't matter from what supplier you purchase the components they all fit on the standard rail without any screws. All the components snap on the rail and can be replaced in no time.
Below you can see some of the DIN-rail mountable parts I use in my brewing projects.
Look closely and you can see the metal rail with all different parts on the rail, terminal blocks, relays, circuit breakers,PLCs, etc.