The NZ2FTS4-4TE is a safety-certified I/O module designed for MELSEC iQ-R Series PLCs, providing 4 channels of Safety Torque Off (STO) functionality for servo drives. This module ensures safe motor shutdown in emergency situations, complying with ISO 13849-1 (PL e, Cat. 4) and IEC 61508 (SIL 3) safety standards.