Product Overview
The WESTINGHOUSE 5X00226G03 is a high-performance Events Input Contact Module specifically engineered for the Ovation Distributed Control System (DCS) platform, providing 16 channels of isolated digital input capability with precise Sequence of Events (SOE) timestamp resolution down to ≤1ms. As a critical component of the Ovation I/O family, the WESTINGHOUSE 5X00226G03 captures field contact states from circuit breakers, protective relays, turbine trip signals, and ESD interlock contacts with the timing accuracy required for post-event analysis and fault diagnosis in power generation and heavy industrial facilities.
The WESTINGHOUSE 5X00226G03 represents a direct evolution from earlier Westinghouse part numbers such as 1C31122G01, with electrical compatibility maintained while benefiting from improved firmware and hardware revision levels. This module supports both wet contact (24–125 VDC) and dry contact input modes, making the WESTINGHOUSE 5X00226G03 adaptable to diverse field device configurations without requiring additional interposing relays. Each input channel features optical isolation of 1500 Vrms, built-in transient suppression, and configurable debounce filtering to ensure reliable signal acquisition in electrically noisy environments typical of power plants and process facilities. Today maintained and supported by Emerson Automation Solutions (successor to Westinghouse’s process control business), the WESTINGHOUSE 5X00226G03 continues to serve as the trusted “first line of defense” for high-integrity digital signal acquisition in thousands of Ovation systems worldwide, particularly in applications where differentiating the precise sequence of protective trips is critical.
Technical Specifications
| Parameter Name | Value |
|---|---|
| Product Model | 5X00226G03 |
| Manufacturer | Westinghouse (now Emerson Automation Solutions) |
| Product Type | Events Input Contact Module / SOE Digital Input Module |
| Platform Compatibility | Westinghouse Ovation DCS |
| Input Channels | 16 channels (single-ended) |
| Input Type | Wet contact (24–125 VDC) or Dry contact (internal excitation configurable) |
| Input Voltage Range | 24–125 VDC / 24 VDC typical |
| Input Current (Typical) | 3–5 mA (internal current limiting) |
| Isolation | Opto-isolated, 1500 Vrms (field to logic) |
| SOE Timestamp Resolution | ≤1 ms |
| Response Time | <10 ms (typical, configurable filtering) |
| Channel Status Indication | 16 green LEDs (per-channel) |
| System Status Indication | OK (Green), FAULT (Red) |
| Diagnostic Features | Open wire detection, short circuit protection |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Mounting | Ovation standard I/O rack (occupies one slot) |
| Ingress Protection | IP20 |
| EMC Compliance | IEC 61000-4 series, IEEE 379 (nuclear) |
| Certification | CE, UL, CSA (batch dependent) |
Main Features and Advantages
High-Speed SOE Capture for Fault Diagnosis: The WESTINGHOUSE 5X00226G03 excels in applications where precise event sequencing is critical. With its ≤1ms timestamp resolution, the WESTINGHOUSE 5X00226G03 enables operators to reconstruct the exact sequence of protective trips, breaker operations, and alarm conditions during plant upsets. When turbine-generator trips occur, the WESTINGHOUSE 5X00226G03 helps engineers determine whether a vibration overspeed or bearing temperature excursion occurred first, enabling root cause analysis that prevents recurrence. This SOE capability distinguishes the WESTINGHOUSE 5X00226G03 from standard digital input modules, making it the preferred choice for critical protective circuits.
Field-Proven Reliability and Diagnostic Capabilities: The WESTINGHOUSE 5X00226G03 incorporates comprehensive diagnostic features including open wire detection, enabling maintenance teams to identify broken or loose field wiring before it leads to undetected signal loss. Each of the 16 channels features independent optical isolation of 1500 Vrms, providing protection against ground loops and high-voltage transients common in power plant switchyards and motor control centers. The front panel of the WESTINGHOUSE 5X00226G03 provides immediate visual feedback through per-channel green LEDs and two system status indicators, enabling rapid troubleshooting without requiring software access.
Versatile Input Compatibility: The WESTINGHOUSE 5X00226G03 accepts both wet contact inputs from field devices providing their own source voltage (24–125 VDC) and dry contacts using the module’s internal 24 VDC excitation. This flexibility eliminates the need for intermediate relays or custom interface circuits, simplifying design and reducing installed cost. The WESTINGHOUSE 5X00226G03 also features configurable debounce filtering to suppress contact bounce from mechanical switches and relays, ensuring that only valid state transitions are reported to the Ovation controller.
Seamless Ovation System Integration: As a native Ovation component, the WESTINGHOUSE 5X00226G03 integrates fully with the Ovation diagnostic database, automatically reporting channel status and health to the operator workstation. Configuration of the WESTINGHOUSE 5X00226G03 is performed within the Ovation engineering environment, with point definitions, alarm attributes, filtering time constants, and SOE participation all managed through the same tools used for controller configuration. This deep integration simplifies engineering, commissioning, and maintenance activities, reducing lifecycle costs for Ovation-based facilities.
