PSSu A Con 4 S 313117 PSSu, connector for compact modules, 1-row, 4-pin, screw connection, SPRINGCON series. The PSS 4000 automation system is the optimum solution for smooth production – and that includes safety and automation!. For PSSuniversal, we provide accessories such as end brackets for top-hat rails, terminating plates, terminals, USB cables and connectors.