PT 2,5-4L - Multi-level Terminal Lock Phoenix Contact PT 2,5-4L - Multi-level Terminal Block provides reliable connections faster and simpler than ever before with Push-in technology. This terminal block improves upon the addition of the fourth-level block to the existing standard feed-through blocks. This four-level product line will also offer functioning blocks. The functioning blocks include knife disconnects, sensor/actuator with or without LED indicator and ground blocks. These blocks use the standardised Clipline complete accessories and feature a block that accepts removable components. Additionally, the four-level blocks come with a bridging channel that is capable of numerous testing accessories. The PT 2,5-4L - multi-level terminal block with its compact design enables wiring in confined spaces and offers increased flexibility with function shafts on each level.