WESTINGHOUSE 4256A88G01 4256A88G04 PLC Controller – Ovation Series
Westinghouse 4256A88G01 4256A88G04 is listed for OVATION RFQ review. Confirm quantity, condition and destination before quotation.
Model: 8720R1 ELVISU-0010 705211777-58
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Technical Dossier
The Emerson Ovation Distributed Control System (DCS) is one of the most widely deployed process automation platforms in global heavy industry. Installed across coal-fired and nuclear power plants, petroleum refineries, chemical processing facilities, and water treatment infrastructure, the Ovation platform — including the ELVISU I/O module family — represents a critical layer of process control in facilities where uptime is measured in years, not hours. The ELVISU-0010 705211777-58 (internal reference: SZM 8720R1) is a field-replaceable module within this ecosystem, designed for integration into Ovation controller cabinets operating under continuous industrial duty cycles.
Emerson's Ovation platform was introduced in the mid-1990s as a successor to the WDPF (Westinghouse Distributed Processing Family) system, inheriting a large installed base in power generation. The ELVISU I/O module family was developed to provide high-density, field-bus-compatible I/O within the Ovation cabinet architecture. Early generations used proprietary backplane communication; later revisions introduced redundant data highways and improved EMI shielding for nuclear-qualified environments. The transition from WDPF to Ovation 3.x introduced compatibility breaks at the backplane level, meaning ELVISU modules from different hardware generations are not always interchangeable without firmware validation. As Ovation has matured into the 3.5+ release cycle, many first- and second-generation ELVISU modules have been discontinued, creating a sustained demand for tested surplus and refurbished units in the maintenance market.
The following SKUs represent verified components within the Emerson Ovation I/O and controller module ecosystem. Each entry reflects a distinct functional role within the cabinet architecture.
Controller & Processor Modules
Analog I/O Modules
Digital I/O & Communication Modules
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