Schneider Electric Modicon Quantum 140ACI04000 – Analog Current Input Module for 0–20 mA / 4–20 mA Loops

The Schneider Electric Modicon Quantum 140ACI04000 is an analog current input module designed for process-grade 0–20 mA and 4–20 mA signals. From my experience, it’s a straightforward way to bring multiple current loops into a Quantum system without adding external signal conditioners. It slots directly into a 140XBPxxx backplane and talks to your 140CPU series controller over the Quantum bus—no extra cabling tricks required. You might notice that it typically pairs well with plant-standard transmitters (pressure, flow, level, pH) and stability is solid in most cases when shielded cabling and proper grounding are used.

Order Placement Process and Guarantees

• – Warranty period: 365 days

• – Delivery time: 1 week for in-stock; no more than one month at the latest

• – Payment: 50% advance payment; full payment before delivery

– Express delivery: FedEx, UPS, DHL

Key Features

• 0–20 mA / 4–20 mA support – Handles standard process currents, so it drops into most brownfield sites smoothly.
• Quantum backplane integration – Plugs into 140XBP racks and communicates via the Quantum bus to 140CPU controllers, keeping wiring tidy.
• Multi-channel design – Consolidates multiple loops on one module, which typically saves rack space and reduces per-point cost.
• Galvanic isolation – Input-to-backplane isolation helps reduce noise and ground-loop headaches in mixed-signal cabinets.
• Diagnostics through the CPU – Channel status and faults are readable from the PLC, which simplifies troubleshooting.
• Conformal-coated option available – The 140ACI04000C variant is commonly used in harsher environments.
• Field-friendly terminal block – Removable front terminal strip makes loop wiring and maintenance more practical.

Technical Specifications

Brand / Model	Schneider Electric / 140ACI04000 (Modicon Quantum)
Product Type	Analog Current Input Module (PLC I/O)
HS Code (reference)	853890 (Parts for industrial control equipment)
Power Requirements	Backplane-powered (5 VDC via Modicon Quantum rack)
Operating Temperature	Typically 0 to 60°C (32 to 140°F), non-condensing environment
Signal Input Types	Analog current inputs for 0–20 mA and 4–20 mA transmitters; shielded twisted-pair recommended
Communication Interfaces	Quantum backplane bus (no front-mounted Ethernet/serial ports)
Installation Method	Rack-mounted, single-slot module for 140XBPxxx backplanes; front removable terminal block

Application Fields

The 140ACI04000 is used across process and hybrid plants where 4–20 mA is the lingua franca. Typical deployments include:

• Water & wastewater – Flow, pressure, and level transmitters tied into Quantum SCADA nodes.
• Oil & gas skids – Compact rack builds that need stable current loops for pressure/temperature while keeping wiring simple.
• Food & beverage – Clean cabinet installs where repeatable analog acquisition matters for batching and CIP control.
• Power & utilities – Turbine auxiliaries and BOP signals brought into legacy Quantum systems.
• Chemicals & pharma – Analog loops for dosing, pH, and conductivity with channel diagnostics through the PLC.

A maintenance supervisor recently mentioned that swapping to this module on an existing 140XBP rack “stabilized two noisy loops” after proper grounding and cable segregation—seems to be a common result when shielding is done right.

Advantages & Value

• Reliability in the field – Built for continuous-duty operation; less drift than ad‑hoc signal adapters in many cases.
• Compatibility – Works seamlessly with 140CPU series and standard Quantum engineering tools, reducing project risk.
• Lifecycle practicality – A direct fit for existing Quantum racks, so retrofits avoid costly panel rework.
• Cost control – Multi-loop density and easy wiring cut install hours and spares holding costs.
• Support – Technical guidance on rack loading, wiring, and loop checks—keeps commissioning smoother.

Installation & Maintenance

• Cabinet & rack – Mount in a properly grounded enclosure with a Schneider 140XBPxxx backplane and a suitably sized 140CPS power supply. Provide ventilation; avoid high-vibration zones.
• Wiring – Use shielded twisted-pair for 4–20 mA loops. Land shields at one end only (typically at the cabinet ground). Keep analog separate from high-voltage and high-frequency cables.
• Loop power – Supports loop-powered and externally powered transmitters. Verify transmitter power supply sizing and polarity before energizing.
• Commissioning – Validate each channel with a loop calibrator at 4, 12, and 20 mA. Check channel scaling in the PLC logic.
• Routine care – Periodically re-torque terminals, inspect for corrosion, and clean dust with dry air. Review PLC firmware release notes; while the module itself has no user firmware, PLC updates can improve diagnostics.
• Safety – De-energize field loops before changes. If performing live work, follow site LOTO and use a current-limited calibrator.

Supporting Components & Typical Pairings

• Backplanes: 140XBP01600 / 140XBP01000 (choose slot count based on I/O density).
• Power supplies: 140CPS11420 or 140CPS12420 (size per rack load; I/O is backplane-powered).
• CPUs: 140CPU65150 / 140CPU67160 and similar, depending on application size.
• Terminal accessories: 140XTS series removable terminal strips for clean field terminations.
• Conformal-coated variant: 140ACI04000C for harsher environments.

Quality & Certifications

• Certifications: CE, UL; RoHS-compliant materials in most production runs.
• Manufacturing quality: Produced under ISO 9001 quality systems.
• Warranty: 365 days (coverage for workmanship and functional performance under normal use).