STBDDI 3725 Product Description Schneider STBDDI 3725, also named Modicon STB 16-channel digital input module, is a distributed discrete input module for Modicon STB remote I/O system. It is designed to collect digital on-off signals from field sensors, supporting signal acquisition for old automation equipment renovation.

This module delivers reliable signal acquisition for field control tasks. The signal acquisition supports 16 channels DC24V sinking digital input. The signal acquisition realizes real-time collection of proximity switch and limit switch status. Stable signal acquisition completes field digital signal capture for mechanical equipment.

The built-in signal processing achieves steady data upload. The data upload transmits field input status to STB interface module via internal bus. The data upload supports fast status refresh for high-speed signal detection. Accurate data upload ensures synchronous signal reading according to control programs.

DIN rail modular structure brings convenient field assembly. Field assembly can be snapped onto STB backplane base. Field assembly connects field sensors via screw terminal block. Flexible field assembly is widely used for legacy Modicon STB system spare replacement.

STBDDI 3725 supports channel state monitoring and integrated power fuse protection function, equipped with removable screw terminal block for sensor wiring. It has LED status indicators for each channel signal diagnosis. Widely applied in conveyor systems, packaging machines and traditional assembly lines. This product is supplied as industrial spare parts, complying with Modicon STB distributed I/O industrial control standards.