The Mitsubishi CC-Link Safety remote I/O module QS0J65BTS2-8D features 8 input points for dual-channel safety input or 16 points for single input, with photoelectric isolation and a rated input voltage of DC24V.

A safety PLC is a programmable system that can correctly respond and promptly cut off outputs even when internal or external components fail. Unlike standard PLCs, it also performs safety control functions in compliance with standards such as EN ISO 13849-1 and IEC 61508. Leading safety PLCs include Pilz PSS 3000 and PSS 4000, with the latter capable of handling both safety and standard control programs. Safety PLCs use redundant and diverse architectures, where two processors cross-check each other. Results are stored separately, and outputs are only activated when both processors produce identical results; any discrepancy causes an immediate system shutdown.