Schneider Electric 140DDI35300 Discrete Input Module

The Schneider Electric 140DDI35300 is a 32-point discrete input module for the Modicon Quantum TSX system, delivering 24 V DC input signals in a 4-by-8 configuration. This 24 V DC input sink module reads field devices such as sensors and switches and translates their status into digital inputs for a Quantum rack, with 32 independent channels wired as sink inputs. The module is designed to support standard industrial automation applications, including machine control, process monitoring, and safety interlocks, by expanding the digital input capacity of Modicon Quantum controllers. Notable specifications include 32 I / 24 V DC, four 8-point banks (4 × 8), and a sink input topology compatible with the Quantum I/O scheme. Schneider Electric lists this part as discontinued by the manufacturer; commercialization ended on December 31, 2022, while service and spare parts are expected through December 31, 2030. For new designs or replacements, Schneider’s recommended alternative is BMXDDI3202K, a Modicon X80 32-input, 24 V DC module (positive-discrete input). The 140DDI35300 is documented in product datasheets and distributor catalogs as a 32 I, 24 V DC discrete input sink module designed to integrate with Quantum controllers in automation installations requiring scalable digital input expansion.