PT 2,5/S-QUATTRO Terminal Blocks Phoenix Contact PT 2,5/S-QUATTRO Terminal Blocks are four-position blocks constructed in the same profile as Phoenix Contact two-position blocks. The PT 2,5/S-QUATTRO series achieves high wiring density without sacrificing space across the DIN rail. These space-saving, high-density terminal blocks provide easy potential distribution with jumpers in the double function shaft. Phoenix Contact PT 2,5/S-QUATTRO Terminal Blocks offer large-surface marking options as well as a reduction in logistics costs when using the uniform CLIPLINE complete system accessories.