The PHOENIX CONTACT PSR-MS20-1NO-1DO-24DC-SC is a safety relay designed for use with emergency stop and safety doors. It is capable of providing safety up to SILCL 1 - Category 1 - Performance Level c, with the potential for SILCL 3 - Category 4 - Performance Level e depending on the specific application. The relay operates with a single channel and features automatic start functionality. It also includes a single enabling current path. The input voltage required is 24 V DC, which is conveniently connected via a fixed screw terminal block. With its robust construction and reliable performance, the PSR-MS20-1NO-1DO-24DC-SC is an ideal safety relay solution for various industrial applications that prioritize safety and compliance.