The first initiator can also be connected to this three conductor feed-through terminal block|The positive and negative potential can be supplied to the insertion bridges via this power terminal block|It 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|The top level contains the feed-through terminal for data flow and the middle and bottom levels have the positive and negative terminals|The three level actuator terminal also has a PE connection in the bottom level|Four wire I/O terminal VIOK 1.5 combines DIK 1.5 with DOK 1.5|The bottom level has the PE connection, with the positive and negative terminals and the top level has the data flow connection, i.e. there is only one terminal for initiator and actuator|Little wiring required as voltage distribution is made by inserting colored jumpers, closed housing, no cover required