Schneider Electric 140DAI35300C 24VAC 32-Point DI

High-Density AC Input Module for Quantum Systems

Maximize your system's input capacity with the Schneider Electric 140DAI35300C discrete input module. Part of the Modicon Quantum series, this module provides an efficient 32-channel solution for monitoring 24V AC field devices. It is engineered for high-density installations where space and channel count are critical factors.

Core Technical Specifications

• Brand & Manufacturer: Schneider Electric
• Product Line & Model: Modicon Quantum / 140DAI35300C
• Type: Discrete (Digital) Input Module
• Input Channels: 32 Channels
• Input Signal Type: 24 Volts AC
• Addressing: Requires 2 Input Words
• Input Current per Point: 11.1 to 13.2 mA
• Max Leakage Current: 1.9 mA
• Bus Current Requirement: 250 mA
• Max Power Dissipation: 10.9 W
• Operating Temperature: 0°C to 60°C

Certifications and Physical Details

• Safety Standards: UL 508, CSA
• Compliance Marking: CE
• Module Format: Standard Quantum Module
• EAN Code: 3595861135840
• Approx. Weight: 0.34 kg

Key Features and Benefits

• Exceptional Channel Density: Thirty-two input points in a single module slot optimize rack space and reduce hardware costs.
• 24V AC Industrial Standard: Directly interfaces with the most common AC control voltages used in industrial panels and machinery.
• Reliable Signal Recognition: Low maximum leakage current (1.9 mA) ensures accurate state detection, minimizing false triggers from stray voltages.
• Certified for Industrial Use: Complies with UL 508 and CSA standards, guaranteeing safety and reliability for control panel applications.
• Efficient Data Handling: The two-word addressing scheme organizes the 32 bits of data logically within the PLC's memory map.
• Robust Thermal Design: Manages up to 10.9W of power dissipation effectively, ensuring stable operation across its temperature range.

Installation and Wiring Guidelines

• Connect a wide array of 24V AC field devices such as pushbuttons, selector switches, and proximity sensors to the 32 channels.
• Plan for two consecutive input words in your Quantum PLC's I/O configuration table for this module.
• Ensure the 24V AC supply for the field devices is properly sized to deliver the required current (11.1-13.2mA per active input).
• Account for the 250mA backplane current draw and 10.9W heat dissipation in your overall system power and cooling design.
• Maintain the operating ambient temperature between 0°C and 60°C for specified performance and module longevity.
• Use appropriate wire management for the higher density of connections to ensure a clean and reliable installation.

Frequently Asked Questions (FAQ)

• Why does this module require 2 input words?
  Because it has 32 digital input channels. In the Modicon Quantum system, one 16-bit word is used for every 16 channels. Therefore, the 140DAI35300C uses two words to represent all 32 of its inputs.
• Can it be used with DC voltage signals?
  No. This module is specifically designed for 24V AC signals. Applying DC voltage will not function correctly and may cause damage.
• What is the advantage of such a high-density module?
  It conserves valuable slots in the Quantum rack, allowing you to connect more I/O points without needing additional chassis, which saves cost and panel space.
• How is the leakage current relevant?
  It defines the maximum stray current when an input is in the OFF state. A low value (1.9mA) is critical for reliably distinguishing a true OFF signal from background electrical noise.
• Is this module suitable for safety-critical inputs (e.g., Emergency Stop)?
  No. The 140DAI35300C is for standard control inputs. Safety functions require modules designed and certified for safety applications (e.g., with dual channels and diagnostics).
• What is the typical application for this module?
  It is ideal for monitoring a large number of AC-powered status signals, control devices, or indicator lights in manufacturing, material handling, or process control systems.

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