Schneider Electric 140DDI35300 Digital Input Module

Schneider Electric's Modicon Quantum 140DDI35300 is a 32‑channel digital input module that provides 24 V DC sink inputs for the Quantum backplane, designed to interface sensors and switches with a Modicon Quantum PLC. The module accepts 19.2 to 30 V DC input, guarantees a high state from 15 to 30 V and a low state from -3 to 5 V, with current drive of at least 2 mA for a high level and no more than 0.5 mA for a low; each input presents about 2.5 kΩ impedance, and the module draws roughly 330 mA from the backplane. Power dissipation is 1.7 W plus 0.36 W per active point, and addressing requires two input words. It provides 32 input status indicators (LEDs) plus dedicated bus (green) and fault (red) indicators; isolation between group and bus is 1780 Vrms for 1 minute, while group isolation is 500 Vrms for 1 minute. Absolute maximum input is 30 V continuous (56 V for a short decaying pulse up to 1.3 ms), and the response time is ≤1 ms for both 0→1 and 1→0 transitions, with input protection provided by resistor-limited design. Net weight is about 0.66 lb (0.3 kg). It is part of the Modicon Quantum automation platform and is intended to be installed in a Quantum chassis to read discrete inputs from field devices; the 140DDI35300 was discontinued on December 31, 2022, with lifecycle information noting End of Commercialization and a recommended replacement such as BMXDDI3202K for newer PAC M340 configurations.