Wago 4 level matrix patch terminal block din 35x15mm no lock plain 727 series wago 727 230 wago 727 230 4 level matrix patching terminal block without locking clips for din rail 35x15mm plain complies with en60715 4 x pair wise connection of clamping units on the same level colour grey 50pcs wago 727 230 4 level matrix block plain no lock din 15mm grey 50pk