The Pilz 777750, also known as the PNOZ s7.1 C, is a reliable contact expansion module designed to increase the number of available safety contacts in an industrial safety circuit. It operates in conjunction with a base safety relay or safety controller, such as those from the PNOZsigma or PNOZmulti series. This compact unit provides three normally open (N/O) safety contacts and one normally closed (N/C) auxiliary contact, enabling the safe switching of multiple circuits from a single safety function. With its 24V DC supply voltage and pluggable screw terminals, the PNOZ s7.1 offers a flexible and efficient solution for expanding safety applications in machinery and plant engineering, ensuring compliance with key international safety standards.