Schneider Modicon Quantum 140DDI36400: DC Input Module

Technical Dossier

Product Details And Specifications

Schneider Modicon Quantum Series Technical Notes

The Schneider Electric Modicon Quantum platform (140-series) is one of the most widely deployed distributed control system (DCS) and programmable logic controller (PLC) architectures in global heavy industry. Installed across petrochemical refineries, nuclear power generation facilities, offshore oil and gas platforms, water treatment plants, and large-scale manufacturing operations, the Quantum rack-based architecture has maintained a dominant position in process automation since its commercial introduction in the mid-1990s. The 140DDI36400 is a 32-channel 24 VDC discrete input module within this platform, designed for high-density digital signal acquisition in safety-critical and continuous-process environments. Its backplane-compatible design allows direct integration into Quantum local and remote I/O racks without additional interface hardware.

The Evolution of Modicon Quantum Architecture

The Modicon Quantum platform succeeded the earlier Modicon 984 and Modicon 800 series, inheriting the Modbus and Modbus Plus communication heritage while introducing a high-speed backplane bus capable of supporting both local and remote I/O expansion via the RIO (Remote I/O) coaxial cable network and, later, Ethernet-based distributed I/O through the Quantum EIO (Ethernet I/O) architecture.

Early Quantum deployments (circa 1995–2002) relied exclusively on the S908 RIO bus for remote rack communication, using head-end adapters such as the 140CRP93100 and 140CRA93100. From approximately 2003 onward, Schneider introduced Ethernet-capable CPUs and communication modules, enabling integration with Modbus TCP/IP networks. The platform's I/O module pinout and backplane connector standard remained backward-compatible across generations, allowing older discrete and analog I/O modules — including the 140DDI36400 — to operate in racks managed by both legacy and modern CPUs.

As of 2024, Schneider Electric has formally announced end-of-sale timelines for the majority of the Quantum 140-series catalog, with migration paths directed toward the Modicon M580 (ePAC) platform. However, given the 20–30 year operational lifecycles typical in nuclear, refining, and chemical processing facilities, the Quantum platform remains in active service at thousands of sites globally, sustaining strong demand for spare parts, repair, and lifecycle extension services.

Modicon Quantum Full Catalog & Functionalities (SKU List)

Discrete Input Modules (DI)

• 140DDI36400: 32-channel 24 VDC discrete input, sink/source, 0.5 ms filter, Quantum backplane compatible
• 140DDI84100: 16-channel 48 VDC discrete input module, isolated, for high-voltage field devices
• 140DDI85300: 16-channel 115 VAC/VDC discrete input, isolated, for mixed AC/DC field wiring
• 140DDI36300: 32-channel 24 VDC discrete input, non-isolated, standard density I/O rack module

Discrete Output Modules (DO)

• 140DDO36400: 32-channel 24 VDC discrete output, 0.5 A per channel, transistor sourcing
• 140DDO88500: 16-channel relay output module, 2 A per channel, Form C contacts, 24–240 VAC/VDC
• 140DDO15310: 8-channel 24 VDC discrete output, high-current 2 A per channel, transistor sourcing

Analog Input Modules (AI)

• 140ACI04000: 4-channel analog current input, 4–20 mA, 12-bit resolution, single-ended
• 140AVI03000: 4-channel analog voltage input, ±10 V / 0–10 V, 12-bit resolution
• 140ARI03010: 4-channel RTD/resistance input, Pt100/Pt1000/Ni100, 16-bit resolution
• 140ATI03000: 4-channel thermocouple input, types J/K/T/E/R/S/B, 16-bit resolution, cold junction compensation

Analog Output Modules (AO)

• 140ACO02000: 2-channel analog current output, 4–20 mA, 12-bit resolution
• 140AVO02000: 2-channel analog voltage output, 0–10 V / ±10 V, 12-bit resolution

CPU & Controller Modules

• 140CPU65150: Quantum CPU, 1 MB user memory, Modbus Plus + Ethernet, Unity Pro compatible
• 140CPU67160: Quantum CPU, 4 MB user memory, dual Ethernet ports, hot standby capable
• 140CPU67060: Quantum CPU, 2 MB user memory, single Ethernet, standard process control

Communication & Network Adapters

• 140NOE77101: Ethernet TCP/IP network option module, 10/100 Mbps, web server, FTP, SNMP
• 140CRP93100: S908 RIO head-end adapter, local rack, coaxial RIO bus master
• 140CRA93100: S908 RIO remote adapter, remote rack, coaxial RIO bus slave

Power Supply Modules

• 140CPS11420: 115/230 VAC input power supply, 3.5 A at 24 VDC backplane output
• 140CPS21400: 24 VDC input power supply, 6 A backplane output, for DC-powered panels

Quality Control for the Modicon Quantum Range

The Modicon Quantum backplane uses a proprietary high-speed parallel bus with edge-connector contacts that are susceptible to oxidation and mechanical wear after extended service. DriveKNMS applies a structured inspection and test protocol to all Quantum modules prior to shipment: