Schneider Electric 140AII33010 Intrinsically Safe Input Module

Product Description

The 140AII33010 by Schneider Electric is a specialized intrinsically safe analog input module developed for the Modicon Quantum PAC platform. It is engineered to acquire current signals from field instruments located in hazardous environments, ensuring safe energy levels in accordance with ATEX and IEC intrinsic safety standards.

Designed for process industries such as chemical plants, oil & gas, and dust-prone facilities, this module enables direct connection to intrinsically safe loops without requiring additional barriers, simplifying system architecture while maintaining compliance.

Although now discontinued, the 140AII33010 remains widely deployed in legacy Quantum systems where reliable, high-accuracy signal acquisition in explosive atmospheres is required.

Key Technical Characteristics

• 8 isolated analog current input channels
• Supported signal ranges: 0–20 mA, 0–25 mA, 4–20 mA
• High-resolution conversion up to 16-bit equivalent (range-dependent scaling)
• Typical accuracy: ±0.05% of full scale at 25°C
• Excellent noise immunity with >100 dB common-mode rejection
• Integrated wire-break detection for 4–20 mA loops
• Certified intrinsically safe for Zone 20/21/22 applications
• Internal current limiting for enhanced safety protection

Technical Specifications

General

• Product Series: Modicon Quantum
• Module Type: Intrinsically Safe Analog Input
• Channels: 8 differential inputs
• Module Format: Standard Quantum I/O module

Input Parameters

• Input Ranges:
  • 0–20 mA
  • 0–25 mA
  • 4–20 mA
• Maximum Input Current: 25 mA (internally limited)
• Input Impedance: 100 Ω ±0.1%
• Resolution:
  • 0–20 mA: 0–20000 counts
  • 0–25 mA: 0–25000 counts
  • 4–20 mA: 0–16000 counts

Accuracy & Performance

• Accuracy: ±0.05% typical, ±0.1% maximum (25°C)
• Temperature Drift: ±0.0025% FS/°C typical
• Linearity Error: ≤0.003% FS
• Common Mode Rejection: >100 dB (50/60 Hz)
• Input Filter: Low-pass filter, -3 dB at ~15 Hz
• Conversion/Update Time: 750 ms

Isolation & Protection

• Channel-to-bus isolation:
  • 2500 V DC (1 minute)
  • 1780 V AC
• Protection: Internal fuse
• Fault Detection: Open-circuit detection (4–20 mA)
• Hot Swap: Not supported (intrinsic safety constraint)

Electrical Requirements

• Power Dissipation: 7.5 W
• Backplane Current: 1500 mA

Environmental Conditions

• Operating Temperature: 0 to 60°C
• Storage Temperature: -40 to 85°C
• Humidity: Up to 95% (non-condensing)
• Maximum Altitude: 5000 m

Certifications & Compliance

• ATEX: II1 G/D Ex ia IIC
• FM Class 1 Division 2
• UL 508, CSA C22.2
• EN 50014, EN 50020, EN 50284
• CE Marked

Applications

• Hazardous area process measurement (gas and dust environments)
• Chemical and petrochemical plants
• Oil & gas upstream and downstream facilities
• Pharmaceutical production with explosion risk
• Grain handling and powder processing industries

Important Notes

• The 140AII33010 module has reached end-of-commercialization (July 2024).
• No direct drop-in replacement exists within the Quantum range.
• Migration to Modicon M580 or newer safety-certified I/O platforms is recommended for new installations.
• Availability is limited to surplus inventory and refurbishment channels.

FAQ

Q: Can this module be used outside hazardous areas? A: Yes, but its intrinsically safe design is primarily intended for hazardous zones, making it unnecessary for standard environments.

Q: Does it require external intrinsic safety barriers? A: No, the module integrates intrinsic safety protection, allowing direct connection to compliant field devices.

Q: Is hot swapping supported? A: No, intrinsic safety standards prohibit live insertion or removal of this module.

Q: What is the recommended upgrade path? A: Schneider Electric typically recommends migrating to Modicon M580 systems with certified remote I/O solutions.