The PNOZ m B0 from Pilz is a compact, single-channel safety relay designed for monitoring emergency stop (E-Stop) buttons, safety door switches, and light curtains in machinery with Category 4/PL e (ISO 13849-1) and SIL 3 (IEC 61508) compliance requirements. Its robust design and modular expandability make it a cornerstone of industrial safety systems across automation, packaging, and material handling sectors.