Description

The WESTINGHOUSE 5X00109G02 is a Redundant Control Processor Module for the WDPF II (Westinghouse Distributed Processing Family) distributed control system, representing the pinnacle of 1990s-era industrial automation technology. Designed for mission-critical processes in power generation and heavy industries, this module delivers fault-tolerant computing power with dual-processor architecture. The 5X00109G02 executes complex regulatory control, sequence logic, and data acquisition while maintaining deterministic performance under extreme loads. As an evolution of earlier WDPF processors, it introduced enhanced memory capacity and radiation-hardened variants for nuclear applications. Operating within Westinghouse’s peer-to-peer network architecture (now supported by Emerson), this module coordinated plant-wide control strategies while providing seamless failover during hardware faults – a critical capability for turbine control systems and safety shutdown sequences where uninterrupted operation is paramount.

The WESTINGHOUSE 5X00109G02 features advanced diagnostics that continuously monitor processor health, memory integrity, and network traffic. Its dual-redundant design allowed “bumpless” transfer between active and standby units during hot-swap maintenance. Compatible with Westinghouse’s CONDUCTOR® workstations, this processor enabled millisecond-synchronized control across 300+ nodes in large-scale power plants. Though discontinued, the 5X00109G02 remains operational in legacy installations worldwide, with Emerson providing specialized lifecycle support for this industrial workhorse.

5X00109G02 WESTINGHOUSE

Technical Specifications

Parameter Name	Parameter Value
Product Model	5X00109G02
Manufacturer	Westinghouse (now Emerson Process Management)
Product Type	Redundant Control Processor
System Platform	WDPF II DCS
Processor Architecture	Dual 32-bit RISC CPUs with Math Co-processor
Memory	8MB DRAM (Error-Correcting), 2MB Flash
Control Capacity	200+ PID Loops per Module
Redundancy	Hot-Standby with Automatic Failover (<100ms)
Communication	Dual 2 Mbps Data Highways (Token-Passing Protocol)
I/O Handling	1,500+ Points per Node
Scan Time	< 40ms for Standard Control Loop
Power Requirement	18W @ 5V DC (Backplane)
Operating Temperature	-10°C to 65°C (14°F to 149°F)
Certifications	UL 508, IEEE 323 (Nuclear), IEEE 472 (Surge)
MTBF	150,000 Hours (Original Design)
Dimensions	320mm × 200mm × 45mm (6U Rack Slot)

Main Features and Advantages

Fault-tolerant architecture: The WESTINGHOUSE 5X00109G02 implemented true hardware redundancy with synchronized memory mirroring between primary and secondary processors. During active module failure, control transitioned seamlessly to the standby unit with zero process disruption. This design exceeded 99.999% availability – critical for boiler protection systems and turbine tripping circuits.

Radiation-hardened capability: Nuclear-qualified variants (5X00109G02-N) featured tantalum capacitor arrays and ceramic-packaged ICs capable of withstanding 10⁶ rads total dose. Error-correcting memory detected and fixed single-bit errors while logging multi-bit faults. The module’s deterministic execution ensured safety-related sequences completed within certified time windows. Backward compatibility with WDPF I configurations simplified plant upgrades. Extended diagnostic coverage included real-time monitoring of CPU load, memory leaks, and network jitter – enabling predictive maintenance.

Application Field

The WESTINGHOUSE 5X00109G02 was deployed in over 700 megawatt-class power units worldwide, controlling critical functions in coal, nuclear, and combined-cycle plants. In coal-fired stations, it managed burner management systems (BMS), electrostatic precipitator controls, and SO₂ scrubber sequencing. Nuclear facilities utilized radiation-hardened versions for reactor feedwater control, turbine island sequencing, and safety-related balance-of-plant systems.

Beyond power generation, the module automated ethylene cracker furnaces in petrochemical plants with precise temperature zoning control. Paper mills relied on its deterministic performance for batch digester pressure profiling, while offshore platforms used it for fire/gas system integration. The 5X00109G02‘s peer-to-peer architecture proved particularly valuable in geographically dispersed applications like pipeline compressor stations, where it coordinated units across 20+ mile distances with <250ms latency.

5X00109G02 WESTINGHOUSE

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