The ABB SPHSS13 is a high-reliability safety relay module designed for industrial safety circuits, providing emergency stop (E-STOP), safety door, and light curtain monitoring functions to ensure compliance with international safety standards (e.g., EN ISO 13849) for machine protection.

The ABB PM866 (Order No.: 3BSE050200R1) is a core processor module of the AC 800M series, equipped with an ARM Cortex-A9 processor, multiple communication interfaces, and redundancy support, designed for executing complex control logic in industrial automation systems.