Reliable AC Signal Acquisition for Modicon Quantum PLCs
The 140DAI34000C discrete input module provides 16 channels for reading 24 V AC signals from field devices. This module belongs to the Modicon Quantum automation platform and handles signals from switches, pushbuttons, and proximity sensors . It converts these AC signals into digital states that the PLC processor can interpret for control logic execution. The conformal coating on this variant offers enhanced protection against moisture and contaminants, making it suitable for demanding industrial environments .
Technical Specifications
The table below details the key technical parameters for the 140DAI34000C input module.
| Parameter | Specification |
|---|---|
| Manufacturer | Schneider Electric |
| Product Type | Discrete AC Input Module |
| Series | Modicon Quantum |
| Input Channels | 16 |
| Input Voltage | 24 V AC |
| Network Frequency | 47 to 63 Hz |
| Input Current | ≤ 12 mA at 57-63 Hz; ≤ 10.7 mA at 47-53 Hz |
| Voltage State 1 (On) | 16-30 V AC at 57-63 Hz; 18-30 V AC at 47-53 Hz |
| Voltage State 0 (Off) | 0-6 V at 57-63 Hz; 0-5 V at 47-53 Hz |
| Input Impedance | 2600 Ω (57-63 Hz); 3100 Ω (47-53 Hz) |
| Max Leakage Current | ≤ 1.9 mA |
| Absolute Max Input | 30 V continuous; 32 V for 10 s; 50 V for 1 cycle |
| Response Time (Off-On) | 4.9 to 0.75 ms × line cycle |
| Response Time (On-Off) | 7.3 to 12.3 ms |
| Isolation (Channels/Bus) | 1780 Vrms for 1 minute |
| Bus Current Draw | 180 mA |
| Power Dissipation | ≤ 5.5 W |
| Addressing Requirement | 1 input word |
| LED Indicators | 16 green (input status); 1 green (bus active); 1 red (fault) |
| Operating Temperature | 0 to 60 °C |
| Storage Temperature | -40 to 85 °C |
| Relative Humidity | 95% without condensation |
| Protective Treatment | Conformal coating (Humiseal 1A33) |
| Net Weight | Approx. 0.3 kg |
| Certifications | UL 508, CSA, FM Class 1 Division 2, CE |
Response Performance and Isolation
The 140DAI34000C delivers rapid response times to ensure timely detection of input state changes. The Off-On transition time ranges from 0.75 ms to 4.9 ms depending on the line cycle frequency . This module offers 1780 Vrms isolation between channels and between channels and the bus, providing robust protection against electrical interference . Furthermore, the absolute maximum input ratings (30 V continuous, 50 V for one cycle) protect the module from voltage spikes .
Conformal Coating and Applications
The “C” suffix in the model number designates the conformal-coated version of the 140DAI34000C . This protective coating significantly enhances the module’s resistance to moisture, dust, and chemical contaminants. Consequently, this module suits demanding applications in material handling, packaging, and textile machinery where environmental exposure is a concern . The module also supports programming through Unity Pro, Concept, and ProWORX 32 software .
Details
| Weight | 0.91 kg |
|---|---|
| Dimensions | 110 × 55 × 90 mm |
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