
Product Description
Woodward 9905-860 Peak 150 Digital Control System
The Woodward 9905-860 represents advanced digital control technology engineered specifically for API611 compliant steam turbine applications. This microprocessor-based control platform delivers precision speed regulation, comprehensive overspeed protection, and seamless integration capabilities for critical power generation and mechanical drive systems.
Technical Specifications
- Power Supply: 24 VDC nominal (18-32 VDC operating range)
- Communication Protocol: Modbus RTU/ASCII serial interface
- Enclosure Rating: NEMA 4/IP65 for harsh industrial environments
- Operating Temperature: -40°C to +70°C (-40°F to +158°F)
- Control Accuracy: ±0.25% speed regulation under steady-state conditions
- Response Time: <50ms for critical overspeed detection
- I/O Configuration: Configurable analog/digital inputs and relay outputs
Industrial Applications
Designed for demanding turbomachinery installations including refinery steam turbines, petrochemical compressor drives, power plant auxiliary systems, and offshore platform generator sets. The Peak 150 architecture ensures reliable operation in environments where API611 compliance and fail-safe protection are mandatory.
System Integration & Solutions
The 9905-860 integrates seamlessly with existing DCS and SCADA platforms via Modbus communication. Field-proven compatibility with Woodward actuators, speed sensors, and auxiliary modules enables rapid commissioning. Advanced diagnostics and event logging facilitate predictive maintenance strategies and minimize unplanned downtime.
Common Technical Questions
Q: Is this controller compatible with non-Woodward actuators?
A: Yes, the 9905-860 supports industry-standard 4-20mA and voltage output signals compatible with most electro-hydraulic actuators.
Q: What overspeed protection features are included?
A: Dual-channel overspeed detection with independent relay outputs, configurable trip setpoints, and self-diagnostic testing meet API611 requirements.
Q: Can I retrofit this unit into legacy control systems?
A: Absolutely. The Peak 150 form factor and I/O flexibility allow direct replacement of older analog governors with minimal panel modifications.
Warranty & Support
Every Woodward 9905-860 unit includes a comprehensive 12-month warranty covering manufacturing defects and component failures. Our technical support team provides configuration assistance, troubleshooting guidance, and application engineering consultation throughout the product lifecycle.
Related Control Solutions
Explore complementary Woodward turbine control products:
- Woodward 8200-182 Peak150 Digital Control - Alternative Peak 150 configuration for gas turbine applications
- Woodward 9907-167 505E Digital Governor - Advanced steam turbine governor with enhanced I/O capacity
- Woodward 9907-1199 CPC-II Converter - Current-to-pressure interface for hydraulic actuator control
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