Description
🚀 Engineered for precise industrial engine and turbine management, the Woodward 9905-195 is a specialized Full Authority Speed Control module within the trusted 2301A series. It delivers comprehensive prime mover speed regulation and precise load control functionality for applications requiring dedicated, standalone governing performance.
Technical Specifications & Datasheet
⚙️ Dimensions: 221 mm x 155 mm x 64 mm (Standard 2301A enclosure format)
⚖️ Weight: Approx. 1.8 kg (4 lbs)
🌍 Country of Origin: United States
⚡ Power Consumption: 15 W nominal
🔌 Operating Voltage: Standard 2301A low-voltage or high-voltage power configuration variants
🌡️ Operating Temperature: -40°C to +85°C (-40°F to +185°F)
🛡️ Enclosure Rating: IP20 chassis-mount with metallic product backplane
⏱️ Control Authority: Full authority speed governing architecture
🔄 Speed Range: Switch-selectable ranges up to 11,450 Hz derived via MPU frequency input
🔌 Actuator Output: Compatible with standard proportional actuators for direct fuel/steam valve control
Operating Procedures & Usage Methods
🛠️ Securely mount the module onto its metallic backplane inside a protective industrial control panel or cabinet, ensuring proper vertical clearance for terminal connections and natural convection cooling.
🔧 Connect the magnetic pickup (MPU) speed sensor, actuator lines, and system power supply strictly according to the terminal wiring diagram printed on the unit housing.
📋 Adjust front-panel potentiometers (such as gain, reset, and speed trim) carefully during initial calibration to match engine dynamics, idle speed setpoints, and full load operating parameters.
Power Sequencing Guidelines
🔌 Startup Sequence: Energize the input power source to initialize internal control circuits, verify that MPU speed signals stabilize within range, and confirm zero fault codes before enabling fuel or steam delivery to the prime mover.
🛑 Shutdown Sequence: Disable the actuator control loop or cut fuel/steam supply to bring the prime mover to a complete, safe stop prior to isolating the main system power feed.
Product Usage Instructions
📖 Utilize the full authority design to manage complete speed governing operations without requiring supplementary governor tiers, ensuring direct closed-loop stability.
📖 Fine-tune response rates using the integrated analog control loops to prevent hunting or overshooting during rapid load steps.
Frequently Asked Questions
💡 Q: What is the primary function of the 9905-195 model? A: It functions as a Full Authority Speed Control module within the 2301A series, providing dedicated, comprehensive prime mover speed regulation.
💡 Q: What does “Full Authority” mean for this controller? A: It means the unit maintains direct and complete control over the fuel or steam actuator to govern engine speed across its entire operating range.
💡 Q: What governor family does this unit belong to? A: It is part of Woodward’s widely deployed 2301A electronic control product line.
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