MELSEC-QS Safety Relay Module External Wiring Precautions

This technical bulletin provides additional precautions for external wiring of safety inputs X0 and X1 when using Mitsubishi MELSEC-QS series safety relay modules, including both main and extension modules. It specifies maximum wire lengths and wire diameters for different system configurations, input types (P type and N type), and production information dates to ensure safe and compliant installation.