Schneider Electric 140CRA93200 – 2-Channel Remote I/O Drop Adapter | Modicon Quantum Platform
Engineering Background
The Schneider Electric 140CRA93200 is a Remote I/O (RIO) Drop Adapter designed for the Modicon Quantum automation platform. It operates on the S908 Remote I/O bus — a deterministic, high-speed coaxial fieldbus architecture that has been the backbone of large-scale process and discrete manufacturing control systems for decades. The S908 bus supports up to 31 drops per head-end adapter, enabling distributed I/O architectures across expansive plant floors without sacrificing scan-cycle integrity.
Product Positioning
The 140CRA93200 serves as the physical and logical gateway between the S908 RIO coaxial trunk cable and the Quantum I/O backplane. With 2-channel coaxial connectivity (primary + redundant path), it is the preferred drop adapter for applications requiring cable redundancy and high system availability. It is a direct replacement and upgrade path for legacy Modicon 800-series RIO drop adapters, making it essential for brownfield modernization projects.
Complete Technical Specifications
| Part Number | 140CRA93200 |
| Manufacturer | Schneider Electric (Modicon) |
| Series / Platform | Modicon Quantum – S908 Remote I/O |
| Module Type | Remote I/O Drop Adapter (RIO Drop) |
| Coaxial Channels | 2 (Primary + Redundant) |
| Bus Protocol | S908 Remote I/O (Coaxial, 57.6 kbps) |
| Max Drops per Head-End | 31 |
| Max I/O Modules per Drop | Up to 8 (Quantum backplane slots) |
| Supply Voltage | 24 VDC (from Quantum backplane) |
| Power Consumption | Refer to Quantum system power budget |
| Operating Temperature | 0 °C to +60 °C |
| Storage Temperature | -40 °C to +85 °C |
| Relative Humidity | 5% to 95% non-condensing |
| Mounting | Modicon Quantum backplane (DIN rail or panel) |
| Dimensions (W × H × D) | Single-slot Quantum module form factor |
| Weight | 550 g (approx.) |
| Certifications | CE, UL, cUL |
| Country of Origin | France / USA (Schneider Electric manufacturing) |
| Firmware | Factory-loaded; compatible with Concept, ProWORX, Unity Pro |
Proven Application Environments
- Oil & Gas: Distributed wellhead and pipeline monitoring with redundant RIO drops for fault-tolerant SCADA integration
- Power Generation & Utilities: Turbine control and substation automation where deterministic scan times are non-negotiable
- Automotive Manufacturing: Body-in-white and paint-shop lines using Quantum PLCs with geographically distributed I/O racks
- Water & Wastewater Treatment: Multi-pump station control with long-distance coaxial RIO trunk runs
- Chemical & Pharmaceutical: Batch process control systems requiring IEC 61511 / SIL-capable architectures
- Brownfield Modernization: Direct replacement for legacy Modicon 800-series RIO drops without rewiring the coaxial trunk
Engineering Advantages
- Dual-Channel Redundancy: Two independent coaxial ports allow primary/redundant cable topology, eliminating single points of failure on the RIO trunk
- Deterministic Scan Performance: S908 bus guarantees fixed-latency I/O updates, critical for high-speed discrete and process control loops
- Backward Compatibility: Plug-compatible with existing Quantum backplanes and S908 coaxial infrastructure — no trunk rewiring required
- Hot-Standby Ready: Supports Quantum Hot Standby CPU configurations for continuous process availability
- Wide Software Ecosystem: Fully supported by Schneider Electric Concept, ProWORX NxT, and Unity Pro / EcoStruxure Control Expert IDEs
- Proven Field Longevity: Modicon Quantum platform has 20+ years of installed base; spare parts and expertise are globally available
System Architecture & Signal Flow
In a Modicon Quantum RIO architecture, the 140CRA93200 occupies a slot on a remote Quantum backplane located at the drop site. The S908 coaxial trunk cable — originating from a head-end Remote I/O Head Adapter (e.g., 140CRP93200) in the main PLC rack — connects to the 140CRA93200 via BNC coaxial connectors on channels 1 and 2. The drop adapter decodes the S908 serial protocol and presents I/O data to the local backplane, where Quantum analog and digital I/O modules reside. Data is returned upstream to the Quantum CPU on the next bus scan cycle. The dual-channel design allows the system to automatically switch to the redundant coaxial path if the primary cable is interrupted, with no loss of I/O data.
Typical topology: Quantum CPU Rack → 140CRP93200 Head Adapter → S908 Coaxial Trunk → 140CRA93200 Drop Adapter → Remote I/O Backplane → Quantum I/O Modules
Sourcing & Quality Verification
- Source: Konmask.com sources 140CRA93200 units from authorized Schneider Electric distributors and verified industrial surplus channels
- Inspection: Each unit undergoes visual inspection, label verification (part number, date code, country of origin), and functional power-on check prior to shipment
- Authenticity: Holographic Schneider Electric labels and factory firmware are verified; counterfeit units are rejected
- Condition: New-in-box (NIB), factory-refurbished, and tested-used grades available — condition clearly stated on each listing
- Packaging: ESD-safe anti-static bag + foam-lined carton; humidity indicator card included for long-haul shipments
- Documentation: Original Schneider Electric datasheet and test report available upon request
Procurement Process
- Step 1 – Inquiry: Submit your RFQ via support@konmask.com or WhatsApp +0086 19859288691 with quantity and required delivery date
- Step 2 – Quote: Receive a formal quotation within 4 business hours including unit price, lead time, and shipping options (DHL / FedEx / sea freight)
- Step 3 – Order Confirmation: Confirm PO; payment via T/T bank transfer, PayPal, or Alibaba Trade Assurance
- Step 4 – Inspection & Dispatch: Unit inspected, photographed, and dispatched with tracking number within 1–3 business days of payment clearance
- Step 5 – After-Sales: 12-month warranty on new units; 90-day warranty on tested-used units. Technical support available throughout project lifecycle
Technical FAQ
Q: Is the 140CRA93200 compatible with Modicon M340 or M580 platforms?
A: No. The 140CRA93200 is exclusively designed for the Modicon Quantum platform and the S908 coaxial RIO bus. M340 and M580 use Ethernet-based distributed I/O (Advantys STB / EtherNet/IP) and are not compatible with S908 infrastructure.
Q: Can I use only one coaxial channel if I don’t need redundancy?
A: Yes. The module operates normally with only Channel 1 (primary) connected. Channel 2 is optional and only activates for redundant cable topologies.
Q: What is the maximum cable distance for the S908 RIO trunk?
A: The S908 bus supports a maximum trunk length of approximately 4,572 m (15,000 ft) using RG-6 coaxial cable with appropriate repeaters. Individual drop spur cables are limited to 30 m (100 ft).
Q: Does the 140CRA93200 require any configuration in Unity Pro / EcoStruxure Control Expert?
A: The drop adapter itself is auto-detected by the Quantum CPU during I/O bus scan. Configuration is performed at the I/O module level within the software project — no separate firmware upload is required for the 140CRA93200.
Q: What is the difference between 140CRA93200 and 140CRA93100?
A: The 140CRA93200 provides 2-channel (dual coaxial) connectivity for redundant cable topologies. The 140CRA93100 provides a single coaxial channel. For new installations or critical applications, the 140CRA93200 is strongly recommended.
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