1. Product Overview

2. Basic Information

• Model Number: 405A973H01

• Brand: Westinghouse / Emerson

• Product Type: DCS Processor / Controller Module

• Applicable Systems: Ovation™ DCS (all generations), WDPF DCS

• Country of Origin: United States

• Weight: Approx. 1.42 kg

• Form Factor: Standard Ovation/WDPF slide-in card

• Warranty: 12 months (new / factory-refurbished)

• Certifications: Emerson factory tested, CE marked, EMC compliant

3. Key Functions

1. Real-Time Control Execution: Runs complex control strategies, PID loops, interlocks, and sequence logic for critical processes.

2. System Coordination: Manages communication between I/O modules, HMI workstations, engineering tools, and network nodes.

3. Data Processing: Collects, filters, and processes analog/digital I/O data; performs calculations and alarm handling.

4. Redundancy Management: Supports 1:1 hot standby with bumpless switchover for high availability.

5. Diagnostics & Health Monitoring: Onboard LEDs and comprehensive fault reporting for fast troubleshooting.

6. Firmware & Configuration Storage: Non-volatile memory for system firmware, control logic, and parameter settings.

4. Technical Specifications

4.1 Electrical

• Power Supply: 24 VDC (DCS standard)

• Power Consumption: 18–25 W (operating)

• Isolation: 1500 VDC (field side ↔ backplane)

• Protection: Overvoltage, overcurrent, ESD, and surge protection

4.2 Processing & Memory

• Processor: High-speed industrial CPU

• Memory: Onboard RAM for execution; non-volatile flash for firmware/config

• Processing Speed: Optimized for real-time DCS workloads

4.3 Communication

• Backplane Bus: Ovation/WDPF proprietary high-speed bus

• Network Interfaces: Supports DCS LAN and peer-to-peer controller communication

• Protocols: Ovation native, WDPF protocols, and standard industrial protocols

4.4 Environmental

• Operating Temperature: 0 °C to +55 °C

• Storage Temperature: -25 °C to +70 °C

• Relative Humidity: 5%–95% (non-condensing)

• Vibration: IEC 61508 compliant, industrial grade

4.5 Mechanical

• Mounting: Slide-in, front-locking latch

• Cooling: Natural convection (no fans)

• Coating: Conformal coated for dust/moisture resistance

5. Compatibility & Replacement

• Compatible With: Ovation/WDPF systems; often paired with 405A924Gxx series MMI/communication modules.

• Replacement Note: Direct upgrade for older Westinghouse/Emerson controller modules; verify firmware compatibility before installation.

6. Applications

• Power Generation: Thermal, combined-cycle, and nuclear power plants (Ovation/WDPF)

• Petrochemical: Refineries, gas processing, and chemical manufacturing

• Heavy Industry: Pulp & paper, mining, cement, and metallurgy

• Water Treatment: Large municipal/industrial water and wastewater facilities

7. LED Indicators

• PWR (Green): On = power OK; Off = power fault

• RUN (Flashing Green): Normal operation; executing logic

• FAULT (Red): Hardware/software fault or diagnostics failure

• COM (Amber): Flashing = active communication; Solid = idle

• REDUND (Blue): On = redundancy active; Standby = backup ready

8. Installation & Safety

1. Power Off: Disconnect cabinet power before insertion/removal.

2. ESD Protection: Use anti-static wristband/mat to prevent electrostatic damage.

3. Insertion: Align with slot guides; push firmly until front latch clicks.

4. Cabling: Connect backplane and network cables per system drawings; ensure tight, shielded connections.

5. Grounding: Connect module ground to cabinet earth (<1 Ω resistance).

6. Power-Up: Restore power; verify LED status; run system diagnostics via engineering station.

9. Maintenance & Troubleshooting

• Routine Checks: Inspect LEDs, cables, and connectors quarterly; clean cabinet vents annually.

• Common Issues:

  • No RUN Light: Check power supply, backplane connection, and firmware.

  • FAULT Light On: Use engineering station to run diagnostics; check for I/O or network faults.

• Firmware Updates: Apply only Emerson-approved firmware; match version to system and redundant partners.

10. Ordering Information

• Part Number: 405A973H01

• Category: DCS Spare Parts → Ovation/WDPF → Processor/Controller Modules

• Availability: New original and fully tested refurbished units in stock

• Lead Time: 1–3 days (in stock); 2–4 weeks (special order)

• Order Note: Provide system serial number and current firmware version for compatibility validation.