WhatsApp: +86 16626708626
Email: 
Phone: +86 16626708626Description
Key Technical Specifications
| Parameter | Specification |
| Manufacturer | Schneider Electric / Modicon |
| Part Number | 140DDI35300 |
| Product Series | Modicon Quantum |
| Input Channels | 32 channels (4 isolated groups of 8 points) |
| Nominal Input Voltage | 24 V DC |
| Input Voltage Range | 19.2 V DC to 30 V DC |
| Input Logic Type | Sink (Positive logic) |
| Logic State Thresholds | State 1 (ON): 15 to 30 V DC | State 0 (OFF): -3 to 5 V DC |
| Input Current | 7 mA per point at 24 V DC |
| Response Time | < 4.8 ms (OFF to ON and ON to OFF) |
| Backplane Current Load | 330 mA at 5.1 V DC |
| Isolation Voltage | 1,780 V AC channel-to-bus for 1 minute |
| Operating Temperature | 0 to 60 °C (32 to 140 °F) |
Product Introduction & Supply Chain Strategy
The Modicon 140DDI35300 is a high-density 32-channel 24 V DC discrete input module engineered for the Modicon Quantum backplane. Configured in four isolated groups of eight points, it monitors field instrumentation status—such as limit switches, pushbuttons, photoelectric sensors, and auxiliary relay contacts—for high-speed continuous manufacturing lines.
With Schneider Electric having fully retired the Quantum platform, maintaining this card as New Surplus is a core supply-chain insurance policy. An I/O input failure can halt machine safety interlocks, stalling production lines. Stocking 1–2 factory-sealed 140DDI35300 modules on-site eliminates lead time variability, avoids optocoupler degradation risks inherent in used or refurbished cards, and optimizes your Total Cost of Ownership (TCO).
140DDI35300
140DDI35300
Installation & Configuration Guide
Stage 1: Pre-Installation (Prep & Safety)
Execute strict Lock-Out/Tag-Out (LOTO) protocols on the Quantum rack power supplies and external 24 V DC field instrument loops. Put on a grounded anti-static wrist strap before touching electronic cards. Photograph the existing field terminal block wiring to maintain an accurate pinout record.
Stage 2: Removal
Unlatch and remove the field terminal block assembly from the front of the card. Depress the upper and lower module retention levers on the Quantum slot. Carefully pull the legacy 140DDI35300 module straight out from the backplane guide rails, ensuring no lateral twisting forces damage the rear backplane pins.
Stage 3: Installation (Clone & Seat)
Inspect the rear backplane interface connector on the new 140DDI35300 module for transport debris or misaligned pins. Slide the card firmly into the targeted rack slot until both locking latches click into place. Re-attach the pre-wired terminal block assembly to the module front interface.
Stage 4: Power-On & Testing
Verify that field loop voltage supplies are reading between 19.2 V DC and 30 V DC using a digital multimeter. Power up the system and confirm that the front panel READY LED turns solid green. Actuate field contacts and verify that the corresponding channel LED illuminates on the card while verifying memory bit transitions (%I address) in EcoStruxure Control Expert (Unity Pro).
Firmware/Software Versions & Upgrade Notes
- Software Compatibility: Fully supported in EcoStruxure Control Expert (formerly Unity Pro), Concept V2.1+, and ProWORX 32 through standard Quantum I/O rack mapping.
- Addressing Allocation: Maps to two 16-bit input words (%I registers) in controller memory allocation tables.
- Voltage Drop Caution: Ensure field switch wiring runs do not suffer excessive line voltage drop. Input voltages dropping below 15 V DC at the module terminals may fail to trigger the ON state threshold, resulting in missed sensor activations in PLC logic.
Frequently Asked Questions (FAQ)
Is this 140DDI35300 input card guaranteed to be New Surplus and unused?
Yes, this module is 100% New Original / New Surplus. Sourced from corporate reserves and factory-sealed channels, it has never been installed in an operational plant, pulled from decommissioned panels, or subjected to component repairs.
Why should I choose New Surplus over a cheaper refurbished 24VDC input card?
Discrete input cards rely on internal optocouplers to isolate high-voltage field lines from sensitive CPU backplane electronics. Over years of thermal and electrical operation, optocouplers in used/refurbished cards suffer LED intensity decay, leading to intermittent input switching and false OFF readings. Buying New Surplus guarantees factory-grade optocouplers and full operating life.
What is the difference between Sinking and Sourcing inputs on Quantum cards?
The 140DDI35300 is a Sink input card (positive logic), meaning field devices switch the positive (+24 V DC) potential to the module inputs, while the module provides the common return path. Sourcing input cards require field devices to switch the negative common (-24 V DC) line to the inputs.
Can I mix different 24V DC power supplies across the input groups?
Yes, the 32 input channels are split into four isolated groups of eight points. Each group features its own isolated field power return line, allowing you to run four distinct 24 V DC field supply circuits on a single 140DDI35300 module without ground loop interference.
What warranty comes with this New Surplus discrete module?
All New Surplus 140DDI35300 modules include a full 1-year replacement warranty. Every card passes complete physical inspection and electrical bench checks prior to dispatch in protective ESD packaging.
