A standard plugable terminal (like Phoenix or any other connector) is mounted with the other components on to the PCB. The side parts and a nd front are screwed to the PCB and slid into the box. The unit is ready. The wire part is then just plugged in. Modular enclosure for M36 DIN-rail. Series REX 4000 is designed for automations equipment and can be used with plugable terminals, D-subs or other kind of connectors in the front. Holes in the front and sides are available according to customers wishes.