General Information

• Brand: Westinghouse (now part of Emerson Electric)
• Model: 1C31179G02
• Product Type: Remote I/O Master Attachment Unit (MAU)
• System Compatibility: Exclusively for Emerson Ovation DCS (compatible with Ovation 1.x to 4.x software versions).
• Core Function: Manages communication between the Ovation controller and remote I/O modules over a standardized protocol (e.g., Profibus DP), expanding system coverage and flexibility.

Technical Specifications

1. Communication & Protocol

• Protocol: Supports Profibus DP (Decentralized Periphery) for high-speed data exchange with remote I/O devices.
• Data Rate: Up to 12 Mbps (dependent on network configuration).
• Interfaces: RS-485 physical layer for Profibus DP connectivity.
• Network Topology: Point-to-point or multi-drop with terminators.

2. Power Supply

• Input Voltage:
  • Standard: 24–48 VDC (nominal) with reverse polarity protection .
  • Note: Some sources mention 220 VAC, but this likely refers to other module variants or mislabeled data. The MAU typically operates on low-voltage DC power.
• Power Consumption: ≤5 W (at full load).

3. Physical & Environmental

• Dimensions:
  • Module: 12.1 cm (W) × 5.2 cm (H) × 16.6 cm (D) [4.8” × 2.0” × 6.5”] .
  • Weight: ~0.35–0.72 kg (0.77–1.59 lbs), varying by configuration.
• Mounting: DIN rail or panel-mounted within Ovation cabinets.
• Operating Temperature: -40°C to +70°C (-40°F to 158°F) .
• Humidity: 5%–95% RH (non-condensing).
• Shock/Vibration Resistance: Compliant with IEC 60068-2-6 (vibration) and IEC 60068-2-27 (shock).

4. Safety & Compliance

• Isolation: 500 VDC isolation between communication ports and power supply.
• Certifications: CE (EMC), RoHS compliant (based on reseller listings; official documentation pending verification) .

Key Features

1. Remote I/O Management:
   • Connects up to 32 remote I/O modules per MAU, extending system reach in large-scale industrial facilities.
   • Supports both digital and analog I/O modules (e.g., 1C31132G01 for analog inputs).
2. Protocol Flexibility:
   • Primarily uses Profibus DP for deterministic communication, ensuring real-time data transfer.
   • Optional support for Modbus RTU or Profinet (dependent on module variant) .
3. Diagnostic Capabilities:
   • Built-in self-test (BIST) for hardware health monitoring.
   • Fault detection for communication errors, power failures, and module disconnections.
   • LED indicators for status (e.g., power, network activity, module connectivity).
4. Hot-Swappable Design:
   • Replaceable without shutting down the Ovation system, minimizing downtime.
5. Modular Integration:
   • Works with Ovation base units (e.g., 1C31223G01) for field device termination.

Applications

• Power Generation: Monitoring steam turbine parameters, boiler controls, and generator diagnostics.
• Chemical/Petrochemical: Managing reactor processes, pipeline pressure, and pump operations.
• Water/Wastewater: Controlling treatment plant pumps, valves, and quality sensors.
• Manufacturing: Automating conveyor systems, robotics, and quality control stations.

Documentation & Support

• Technical Manual: Available via Emerson’s official support portal (document ID: TBD).
• Software Configuration: Requires Ovation Configuration Studio (v3.5+) for network setup and parameter tuning.
• Spare Parts: Compatible with Emerson/Ovation replacement kits (e.g., 1C31179G02-KIT).

Ordering Information

• Base Model: 1C31179G02 (standard Profibus DP MAU).
• Optional Accessories:
  • Profibus DP terminators (1C31234G01).
  • Isolated power supply (24–48 VDC) for remote segments.
• Lead Time: 4–6 weeks (standard orders); 2–3 weeks for urgent spares.