Schneider Electric 140AIO33000 Analog Output Module

Product Description

The 140AIO33000 from Schneider Electric is an intrinsically safe analog output module developed for the Modicon Quantum automation platform. It is intended for precise current signal control in hazardous locations, allowing direct interfacing with field devices such as control valves and actuators operating within explosive atmospheres.

With eight independent current output channels, the module supports standard industrial ranges and integrates intrinsic safety barriers within its design. This eliminates the need for external protection devices, simplifying installation in ATEX-certified systems.

Although discontinued, the 140AIO33000 remains a key component in legacy Quantum installations where safe and stable analog output transmission is critical.

Core Features and Capabilities

• Eight analog current output channels with intrinsic safety protection
• Output signal options: 0–20 mA, 0–25 mA, and 4–20 mA
• Designed for direct deployment in ATEX Zone 20, 21, and 22 environments
• Fast response with millisecond-level update and settling times
• Integrated diagnostics for open-loop detection in 4–20 mA circuits
• High immunity to electromagnetic interference in industrial environments

Technical Specifications

General Characteristics

• Product Family: Modicon Quantum
• Module Function: Intrinsically Safe Analog Output
• Channel Count: 8 outputs
• Module Format: Standard Quantum I/O

Output Parameters

• Output Ranges:
  • 0–20 mA (0–20000 counts)
  • 0–25 mA (0–25000 counts)
  • 4–20 mA (15-bit resolution: 0–16000 or 0–4095 counts)
• Maximum Loop Resistance: 500 Ω
• Resolution: Up to 15-bit (range dependent)

Performance Metrics

• Accuracy: ±0.2% of full scale at 25°C
• Temperature Coefficient: 40 to 70 ppm/°C
• Linearity: ±1 LSB
• Update Time: 4 ms
• Settling Time: 1 ms to ±0.1% of final output

Electrical and Isolation

• Isolation (channel-to-bus): 1780 Vrms (AC, 60 seconds)
• Power Dissipation: typically 12.5 W
• Backplane Current Consumption: approximately 2.5 A
• Protection: Internal fuse
• Hot Swap Capability: Not permitted due to intrinsic safety requirements

Diagnostics and Safety

• Fault Detection: Open circuit monitoring (4–20 mA loops)
• Intrinsic Safety Marking: II1 G/D Ex ia IIC
• Designed for direct connection to certified field devices in hazardous zones

Environmental Conditions

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

Compliance and Certifications

• ATEX Directive 94/9/EC
• UL 508, CSA C22.2 No.142
• EN 50014, EN 50020, EN 50284
• FM Class 1 Division 2
• CE Marked

Application Areas

• Hazardous process control systems (gas and dust environments)
• Oil & gas production and refining
• Chemical processing plants
• Industrial automation requiring intrinsically safe analog control loops
• Facilities handling combustible dust or volatile substances

Lifecycle and Migration Notes

• The 140AIO33000 has been discontinued and is no longer in production.
• Official service support ended earlier, though third-party maintenance may still be available.
• No direct functional replacement exists within the Quantum range.
• Migration to Modicon M580 or other modern PAC systems is recommended for system upgrades.

FAQ

Q: Can this module directly drive field actuators in hazardous areas? A: Yes, it is designed for direct connection to intrinsically safe field devices without external barriers.

Q: Is redundancy supported for critical applications? A: Redundancy must be implemented at the system level; this module itself does not provide redundant outputs.

Q: What happens if the loop is disconnected? A: The module detects open-circuit conditions in 4–20 mA mode and reports diagnostics to the controller.

Q: Is this module suitable for new installations? A: It is not recommended for new projects due to obsolescence; newer platforms such as Modicon M580 should be considered.