Distributed I/O Solution – Schneider Electric 140CRA21110 | Quantum Series
The Schneider Electric 140CRA21110 is a DIO (Drop Interface) module engineered for the Modicon Quantum distributed I/O architecture. It serves as the remote drop adapter that connects field-level I/O modules to the Quantum PLC backplane via the Modbus Plus or RIO (Remote I/O) network — enabling deterministic, high-availability control across large-scale industrial installations.
Where This Product Is Used
The 140CRA21110 is specified in applications where I/O must be distributed across large plant footprints while maintaining tight scan-cycle synchronization with the Quantum CPU:
- Oil & Gas Processing Plants — Remote drop adapters installed in field junction boxes, connecting pressure, temperature, and valve I/O back to the control room PLC over RIO cable.
- Water & Wastewater Treatment Facilities — Distributed pump station control where each lift station runs a local I/O drop, supervised by a central Quantum rack.
- Automotive Assembly Lines — Body-in-white and paint shop conveyors using Quantum RIO drops for zone-level I/O without running individual wires to a central panel.
- Power Generation & Utilities — Turbine auxiliary systems and switchgear control panels requiring IEC-compliant, deterministic I/O scanning.
- Mining & Minerals Processing — Crusher, conveyor, and flotation cell control in harsh environments where remote I/O reduces cable runs and improves fault isolation.
- Chemical & Pharmaceutical Manufacturing — Process skids requiring segregated I/O drops for safety-zone compliance and ease of validation.
Technical Specifications
| Part Number | 140CRA21110 |
| Manufacturer | Schneider Electric (Modicon) |
| Series | Modicon Quantum |
| Module Type | DIO Drop Interface (Remote I/O Adapter) |
| Network Protocol | Modbus Plus / Quantum RIO |
| Drop Address Range | 1–31 (configurable via rotary switch) |
| Max I/O Modules per Drop | Up to 6 I/O modules per drop rack |
| Power Supply Voltage | 24 VDC (from backplane) |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Relative Humidity | 5% to 95% non-condensing |
| Weight | 600 g |
| Mounting | Quantum backplane slot (leftmost position) |
| Dimensions | Standard Quantum single-slot form factor |
| Indicators | RUN, ERR, COM LEDs for rapid field diagnostics |
| SKU / Order Reference | 140CRA21110 |
Why Engineers Specify This Model
- Deterministic RIO Scanning — The Quantum RIO network delivers fixed, predictable scan times critical for motion-sensitive and safety-related applications.
- High Drop Count — Supports up to 31 remote drops per RIO head, enabling plant-wide I/O distribution from a single Quantum CPU.
- Plug-and-Play Replacement — Drop address is set via hardware rotary switch; no software reconfiguration required on module swap, minimizing MTTR.
- Proven Platform Longevity — The Modicon Quantum platform has decades of installed base in critical infrastructure, with long-term spare parts availability.
- Integrated Diagnostics — Onboard LED indicators and Unity Pro / Concept software diagnostics allow rapid fault isolation without test equipment.
- Robust Environmental Rating — Designed for industrial panel environments with wide temperature tolerance and vibration resistance per IEC standards.
Complete System Bill of Materials
A typical Quantum remote I/O drop using the 140CRA21110 requires the following components:
| Component | Schneider Electric Part No. | Description |
|---|---|---|
| Drop Interface Adapter | 140CRA21110 | This module — RIO drop adapter |
| Remote I/O Rack | 140XBP01600 / 140XBP00600 | Quantum backplane (16-slot or 6-slot) |
| Power Supply | 140CPS11420 / 140CPS21400 | Quantum rack power supply (24 VDC or 115/230 VAC) |
| RIO Cable | AS-MBKT-085 / Belden 9463 | Modbus Plus / RIO coaxial trunk cable |
| RIO Tap | AS-MBKT-085 series | T-tap connector for RIO trunk |
| Discrete Input Module | 140DAI54000 / 140DDI35300 | 16/32-ch 24 VDC discrete input |
| Discrete Output Module | 140DAO84000 / 140DDO35300 | 16/32-ch 24 VDC discrete output |
| Analog Input Module | 140ACI04000 | 4-ch analog input (4–20 mA) |
Compliance & Industry Standards
- CE Marking — Compliant with EU Low Voltage and EMC Directives
- UL Listed — UL 508 (Industrial Control Equipment)
- IEC 61131-2 — Programmable controllers — Equipment requirements and tests
- IEC 61000-4 Series — EMC immunity (ESD, EFT, surge, conducted RF)
- RoHS Compliant — Restriction of Hazardous Substances (EU Directive 2011/65/EU)
- ATEX / IECEx — Consult Konmask for zone-rated enclosure pairing requirements
Quality Assurance & Sourcing
All Schneider Electric modules supplied by Konmask.com are subject to the following quality controls before dispatch:
- ✅ Visual Inspection — Enclosure, label, connector pins, and LED lenses checked for damage or tampering
- ✅ Label & Firmware Verification — Part number, revision, and date code cross-referenced against Schneider Electric official documentation
- ✅ Functional Power-On Test — Module powered and LED self-test sequence verified where applicable
- ✅ Anti-Static Packaging — Shipped in ESD-safe bags with foam cushioning and double-wall carton
- ✅ Traceability — Each unit logged with serial number and inspection record; documentation available on request
Konmask.com sources from authorized distributors and verified industrial surplus channels. We do not supply counterfeit, relabeled, or untested product.
How to Source This Part
- Add to Cart — Click the purchase button above to place an order directly.
- Request a Quote — For volume orders (5+ units), contact support@konmask.com for tiered pricing.
- Lead Time — In-stock units ship within 1–3 business days. Out-of-stock items: 7–21 business days depending on sourcing channel.
- Export & Cross-Border — We support international shipments with commercial invoice, packing list, and HS code documentation (HS: 8537.10).
- Payment — T/T bank transfer, PayPal, and major credit cards accepted. Letter of Credit available for orders above USD 10,000.
Application-Specific FAQ
Q: Can the 140CRA21110 be used with a Quantum Hot Standby (HSBY) CPU system?
A: Yes. The 140CRA21110 is fully compatible with Quantum HSBY configurations. Both primary and standby CPUs scan the RIO drops; on failover, the standby CPU assumes control of all drops without I/O interruption.
Q: What is the maximum RIO cable length per segment?
A: The Quantum RIO network supports up to 1,500 m (4,921 ft) of trunk cable per segment using Belden 9463 or equivalent coaxial cable, with repeaters available for longer runs.
Q: How many 140CRA21110 drops can one Quantum CPU support?
A: A single Quantum RIO head adapter (e.g., 140CRP93200) supports up to 31 remote drops. Multiple RIO heads can be installed in one Quantum rack for expanded capacity.
Q: Is this module compatible with Unity Pro and Concept programming software?
A: Yes. The 140CRA21110 is recognized and configurable in both Schneider Electric Unity Pro (now EcoStruxure Control Expert) and the legacy Concept IEC programming environment.
Q: What happens if the RIO cable is cut or the drop loses communication?
A: The module’s ERR LED activates and the CPU registers a communication fault. I/O outputs fall to their configured safe-state values (hold last state or de-energize) as defined in the CPU configuration.
Q: Can I replace this module hot (with the rack powered)?
A: Hot-swap is not supported on the Quantum platform for drop adapter modules. The rack should be de-energized before replacing the 140CRA21110 to prevent backplane damage.
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