Schneider Electric 140ACI04000C Analog Input Module

Product Description

The Schneider Electric 140ACI04000C is a high-density analog input module developed for the Modicon Quantum PLC architecture. With 16 differential input channels, it enables efficient acquisition of multiple process signals within a single slot, making it suitable for complex control systems requiring compact I/O configuration.

This module supports multirange analog inputs, allowing seamless handling of both current and voltage signals. Its conformal coating enhances durability in harsh industrial environments, including high humidity and chemically aggressive conditions.

Although the 140ACI04000C is no longer in active production, it remains serviceable within existing Quantum installations and is supported by Schneider Electric until the defined end-of-service period.

Technical Specifications

• Product Platform: Modicon Quantum
• Module Type: Analog Input (Differential)
• Number of Channels: 16
• Supported Input Ranges:
  • 0–20 mA
  • 4–20 mA
  • 0–25 mA
• Resolution:
  • 12-bit equivalent (up to 25,000 counts depending on range)
• Accuracy: ±0.125% of full scale
• Linearity Deviation:
  • ±6 µA (typical ranges)
  • ±12 µA (4–20 mA max)
• Temperature Stability: ≤ ±0.005% FS/°C
• Input Impedance: 250 Ω (current inputs)
• Maximum Input Current: 30 mA
• Addressing Requirement: 17 input words
• Update Time: ~15 ms (2-wire / 4-wire transmitters)

Filtering & Signal Quality

• Integrated low-pass filter:
  • Single-pole design
  • -3 dB at approximately 34 Hz
• Common Mode Rejection Ratio: > 90 dB at 60 Hz

Isolation & Protection

• Channel-to-bus isolation: 1780 V AC for 60 seconds
• Built-in diagnostics:
  • Open circuit detection for 4–20 mA loops
• ESD immunity:
  • 4 kV contact
  • 8 kV air discharge
• Electromagnetic immunity: up to 10 V/m (80–1000 MHz)

Mechanical & Environmental Data

• Module Format: Standard Quantum form factor
• Mounting: Backplane (Quantum rack installation)
• Weight: 0.3 kg
• Power Dissipation: 5 W
• Bus Current Consumption: ~360 mA
• Operating Temperature: 0 to 60°C
• Storage Temperature: -40 to 85°C
• Humidity: Up to 95% non-condensing
• Altitude: Up to 5000 m
• Protective Coating: Conformal coating (Humiseal 1A33)

Status Indicators

• 1 × Green LED: Module active / communication
• 1 × Red LED: Module fault
• 16 × Green LEDs: Channel active status
• 16 × Red LEDs: Channel fault indication

Compliance & Certifications

• Standards: UL 508, CSA C22.2 No. 142
• Certifications: FM Class 1 Division 2, cUL
• CE marking compliant

Application Areas

• Multi-loop process monitoring
• Chemical and petrochemical plants
• Water and wastewater treatment systems
• Energy and utility control panels
• Retrofit of legacy Quantum PLC systems

FAQ

Can this module process voltage inputs like ±10 V? No. Unlike some lower-channel variants, this model is primarily optimized for current inputs (0–20 mA, 4–20 mA, 0–25 mA).

What is the advantage of 16 channels in one module? It reduces rack space requirements and simplifies wiring for systems with a high number of analog signals.

Is it suitable for new automation projects? For new systems, Schneider Electric recommends transitioning to the Modicon X80 platform due to lifecycle status and future support considerations.