Mitsubishi FX5-SF-8DI4 Safety Extension Module for MELSEC iQ-F FX Series

The Mitsubishi FX5-SF-8DI4 (FX5-SF-8DI4) is a compact safety extension module designed for integration with MELSEC iQ-F FX5 series programmable logic controllers. Engineered to simplify machine safety integration, this module provides 8 safety input points (or 4 dual-channel safety inputs) alongside 4 test pulse outputs for monitoring external safety devices. It connects seamlessly to the FX5 CPU system to monitor emergency stop switches, safety light curtains, safety interlock switches, and protective sensors. The unit allows configuration via onboard rotary function switches, eliminating the need for complex ladder safety programming and reducing commissioning time. Built for reliable operation in industrial environments, the module supports standard DIN rail mounting and integrates directly into the extension bus of FX5U and FX5UC PLC systems. Typical applications include packaging machinery, automated assembly cells, material handling equipment, and robotic manufacturing stations requiring Cat 4 PLe and SIL 3 safety compliance.