Schneider Electric Modicon Quantum 140 Series Modules — 140CRA93200

Technical Dossier

Product Details And Specifications

Schneider Electric Modicon Quantum 140 Series: Comprehensive Module Range and Technical Overview

The Schneider Electric Modicon Quantum 140 series is one of the most widely deployed programmable automation controller (PAC) platforms in global heavy industry. Installed across petrochemical refineries, nuclear power generation facilities, offshore oil & gas platforms, and large-scale chemical processing plants, the Quantum architecture has served as the backbone of safety-critical and process-critical automation since the early 1990s. Its modular backplane design, deterministic Modbus Plus and Ethernet I/O bus communication, and broad I/O density have made it the reference platform for distributed control system (DCS) integration in brownfield environments. The 140CRA93200 is a Remote I/O Adapter module within this series, enabling communication between the Quantum CPU rack and remote I/O drops over Ethernet RIO (S908 protocol), a configuration standard in large plant topologies where I/O is distributed across multiple physical locations.

The Evolution of Modicon Quantum 140 Architecture

The Modicon Quantum platform was introduced by Modicon (later acquired by Schneider Electric) in the early 1990s as a successor to the Modicon 984 series. The architecture was designed around a high-speed local backplane (S908 bus) supporting up to 16 slots per rack, with a deterministic scan cycle suited to process automation. Early CPU modules such as the 140CPU11302 and 140CPU43412A operated on Modbus Plus as the primary network. As Ethernet became the industrial standard, Schneider introduced Ethernet-capable CPUs (140CPU65150, 140CPU65160) and Ethernet Remote I/O adapters (140CRA93200, 140CRA93100) to extend the platform's service life into the 2010s. The Quantum series entered its mature/end-of-life phase progressively from 2015 onward, with Schneider Electric announcing migration paths to the Modicon M580 (ePAC) platform. However, due to the enormous installed base in refineries and power plants — where platform replacement requires full process shutdown and revalidation — the Quantum 140 series remains in active service globally and requires sustained spare parts support through 2030 and beyond.

Modicon Quantum 140 Full Catalog & Functionalities (SKU List)

CPU / Controller Modules

• 140CPU11302: Quantum CPU, 512KB memory, Modbus Plus, single port
• 140CPU43412A: Quantum CPU, 1MB memory, Modbus Plus + Modbus serial
• 140CPU65150: Quantum CPU, 7MB memory, 10/100 Ethernet, Unity Pro compatible
• 140CPU65160: Quantum CPU, 7MB memory, dual Ethernet ports, hot standby ready
• 140CPU67160: Quantum CPU, 14MB memory, dual Ethernet, enhanced process performance

Remote I/O Adapter Modules

• 140CRA93100: Ethernet Remote I/O adapter, single port, S908 RIO protocol
• 140CRA93200: Ethernet Remote I/O adapter, dual port, redundant network path support

Digital Input (DI) Modules

• 140DAI34000: 32-channel 24VDC digital input module, sink/source
• 140DAI54000: 16-channel 115VAC digital input module
• 140DAI74000: 16-channel 230VAC digital input module

Digital Output (DO) Modules

• 140DAO84000: 16-channel 115/230VAC digital output, relay isolated
• 140DDO35300: 32-channel 24VDC digital output, transistor source

Analog Input (AI) Modules

• 140ACI04000: 8-channel analog current input, 4–20mA, 12-bit resolution
• 140AVI03000: 8-channel analog voltage input, ±10V / 0–10V, 12-bit
• 140ATI03000: 8-channel thermocouple/mV input module

Analog Output (AO) Modules

• 140ACO02000: 4-channel analog current output, 4–20mA, 12-bit

Communication / Network Modules

• 140NOE77100: Ethernet TCP/IP network option module, 10/100 Mbps
• 140NOE77101: Ethernet TCP/IP module with enhanced web server and FTP
• 140NOM21200: Modbus Plus network option module, dual port

Power Supply Modules

• 140CPS11420: 115/230VAC power supply, 20A output for Quantum rack
• 140CPS21400: 24VDC power supply, 20A, for DC-powered installations

Sourcing Hard-to-Find & Obsolete Modicon Quantum 140 Parts

DriveKNMS maintains a dedicated inventory program for Modicon Quantum 140 series modules, with particular focus on CPU variants, remote I/O adapters, and communication modules that have been discontinued by Schneider Electric. For facilities operating Quantum-based DCS architectures where platform migration is not feasible within the current maintenance cycle, DriveKNMS provides: verified surplus stock of discontinued modules, functional testing against original factory specifications, and traceability documentation for regulated industries (nuclear, pharmaceutical, petrochemical). The 140CRA93200 and related Ethernet RIO adapters are among the highest-demand obsolete items in the Quantum catalog, given their role as the communication backbone of distributed rack topologies. DriveKNMS sources these through certified secondary market channels and performs full electrical and functional validation prior to dispatch.

Quality Control for the Modicon Quantum 140 Range

The Quantum 140 series presents specific test challenges due to its S908 backplane bus architecture and dual-port Ethernet RIO communication design. DriveKNMS applies a structured test protocol for all Quantum modules: backplane slot insertion and bus continuity verification, power rail integrity check (5VDC, 24VDC), firmware version identification and logging, Ethernet port link negotiation test (10/100 auto-MDI-X), I/O channel functional scan for all AI/DI/DO/AO modules, and communication handshake validation for adapter modules including the 140CRA93200. Modules that fail any stage of this protocol are quarantined and not offered for sale. All passed units are shipped with a test report and 12-month operational warranty.

© 2026 DriveKNMS. All trademarks belong to their respective owners. Specifications are for reference only and subject to change without notice. Verify all parameters against official documentation before installation.