Product Overview
The WESTINGHOUSE 5X00226G03 is a 16-channel digital input module engineered specifically for the Ovation distributed control system, serving as the primary interface for discrete contact signals that demand high-integrity acquisition. As an Events Input Contact module, the WESTINGHOUSE 5X00226G03 captures switch status from field devices including valve limit switches, auxiliary relay contacts, and hardwired trip signals, routing them through RC filtering and high-speed optical isolation to the Ovation backplane bus. The module’s designation as an “Events Input” reflects its suitability for event-driven discrete loads where precise state detection matters, distinct from dedicated SOE cards that handle millisecond-resolution timestamping.
Within the Ovation architecture, the WESTINGHOUSE 5X00226G03 functions as a foundational component for safety-critical signal acquisition in power generation and heavy process industries. Each of its 16 channels supports both wet contact inputs (24-125 VDC field-powered) and dry contact inputs through configurable internal excitation, eliminating the need for external wiring resistors in unpowered switch applications. The module’s per-channel current limiting and short-circuit protection safeguard against field wiring faults, while the built-in open wire detection feature—active when internal excitation is configured—distinguishes between a genuine contact opening and a broken field circuit.
The WESTINGHOUSE 5X00226G03 represents a generational improvement over legacy WDPF-era input modules, advancing channel-to-backplane isolation from approximately 1000 Vrms to 1500 Vrms. This enhanced isolation withstands transient surges of 4-8 kV commonly encountered near switchyards and high-voltage equipment, with additional CRC protection on the backplane bus ensuring data integrity. For facilities operating Ovation systems across thermal, nuclear, and combined-cycle plants, the WESTINGHOUSE 5X00226G03 delivers the deterministic response and diagnostic transparency required for continuous process availability.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | WESTINGHOUSE 5X00226G03 |
| Manufacturer | Westinghouse (Emerson Automation Solutions, Ovation platform) |
| Product Type | Events Input Contact Module (16-Channel Digital Input) |
| Input Channels | 16 single-ended, grouped 8 per common |
| Input Voltage Range | 24-125 VDC (wet contact); internal 24 VDC excitation for dry contact |
| ON/OFF Threshold | ON ≥ 15 VDC; OFF ≤ 5 VDC |
| Input Current | 3-5 mA typical (internal current limiting) |
| Isolation | Channel-to-backplane optical isolation, 1500 Vrms (1 min) |
| Response Time | < 10 ms (software-configurable filter for contact debounce) |
| Diagnostic Features | Open wire detection (with internal excitation), per-channel short-circuit protection |
| Backplane Communication | Ovation high-speed bus, automatic database mapping |
| Mounting | Ovation standard I/O rack, single-slot, hot-swappable |
| Operating Temperature | 0°C to +60°C (storage: -40°C to +85°C) |
| EMC Compliance | IEC 61000-4 series: ESD ±8 kV contact / ±15 kV air, EFT ±2 kV, surge ±1 kV |
| Certifications | CE, UL 61010-1, CSA; IEEE 379 reference for nuclear-grade EMC |
