Phoenix contact three level feed through terminal block 0 2 4mm phoenix contact 2715979 the phoenix contact three level feed through terminal block 0 2 4mm sup2 has been manufactured for efficient wiring of modern machine control systems and is mounted on a din en 50 022 standard flat top hat rail all three conductors of the initiator terminal are connected in parallel through one terminal p the top level contains the feed through terminal for data flow and the middle and bottom levels