There are several different ways in which a terminal block can make a connection including:
Generally a terminal block is mounted on a printed circuit board (PCB) or there is a panel that is screwed into the wall that it’s able to snap onto. But here are some other mounting options for your consideration:
1. Rail- DIN (Deutsches Institut fur Normung) rails, in one form or another, are commonly used when you are mounting the terminal blocks. As you can tell from its name, it is German and the rails design is their standard. The DIN does have several other sizes depending on your needs.
2. PCB Mounts, also called electronic blocks, are the other form of mounting. A terminal block will sometimes have been designed to PCB, pins may have been inputted so that they can be mounted through the circuit board, or you may just be able to plug it into a pin strip located on the circuit board.
There are a few devices that a terminal block is able to be used with including: