Overview
The 140DDI35300C is a Schneider Modicon Quantum automation platform low-voltage DC discrete input module, order code 140DDI35300C, providing 32 input points across 4 channels at 24 V DC with positive (sink) logic. It draws 1.7 W from the backplane, mounts on a Quantum chassis, and carries CE marking plus UL 508 and CSA C22.2 No 142 certifications.
Input protection is resistor-limited; the absolute maximum input rating is 30 V continuous, with a 56 V decaying pulse tolerance for 1.3 ms — enough to survive brief transients on a 24 V DC control bus. Isolation between groups is 500 Vrms for 1 minute, and isolation between group and bus is 1780 Vrms for 1 minute, providing robust noise separation in mixed-voltage cabinets. The module carries conformal coating (Humiseal 1A33) for protection against moisture and contaminants, and operates over a storage temperature range of -40 to 185 °F (-40 to 85 °C).
Applications
This 32-point DC input module is used in Modicon Quantum racks for discrete sensing in machine control, material handling, packaging, and process skids — reading limit switches, proximity sensors, pushbuttons, and photo-eyes into the controller's logic map.
Within the Modicon Quantum automation platform, the 140DDI35300C is a standard-density 32-point DC input module specified for applications that need positive-logic (sink) input wiring. It sits alongside the 140DDI35310 (negative/source logic) and the 140DAI35300 (AC input) as a logic-family choice for the same 4-channel, 32-point frame.
The 140DDI35300C carries CE marking and is certified to UL 508 and CSA C22.2 No 142, with additional marine approvals (RMRS, ABS, GOST, BV, DNV, RINA). It also complies with California Proposition 65. The module is conformally coated and carries an 18-month warranty.