Description
🚀 Engineered for precise industrial engine and turbine management, the Woodward 9905-026 is a low-voltage, forward-acting load sharing and speed control module within the trusted 2301A series. It provides reliable prime mover speed regulation and proportional active power load distribution for generators operating individually or in parallel configurations.
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: Low-voltage DC input variant (typically 18 to 32 VDC)
🌡️ Operating Temperature: -40°C to +85°C (-40°F to +185°F)
🛡️ Enclosure Rating: IP20 chassis-mount with metallic product backplane
⏱️ Control Action: Forward acting output configuration
🔄 Speed Range: Rated speed up to 11,450 Hz derived via MPU frequency input
🔌 Actuator Output: Compatible with standard low-voltage proportional actuators
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, current transformers, actuator lines, and low-voltage DC power supply strictly according to the terminal wiring diagram on the unit housing.
📋 Adjust the front-panel potentiometers (such as gain, reset, speed trim, and load droop/isochronous settings) carefully during initial calibration to match engine dynamics and synchronization parameters.
Power Sequencing Guidelines
🔌 Startup Sequence: Energize the low-voltage DC power supply 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
📖 Ensure the forward-acting output configuration matches the response characteristics of your specific fuel valve or actuator to guarantee stable closed-loop speed control.
📖 Select isochronous mode when coordinating constant frequency across multiple paralleled engines, or switch to droop mode for single-engine speed governing and isolated electrical generation.
Frequently Asked Questions
💡 Q: What are the core electrical characteristics of the 9905-026 model? A: It is a low-voltage, forward-acting load sharing and speed control unit designed for Woodward 2301A systems.
💡 Q: What does “forward acting” mean for this control module? A: It means an increase in the control signal output drives a corresponding increase in actuator position (such as increasing fuel flow).
💡 Q: What is the primary application of this device? A: It is used to govern prime mover speed and divide active electrical load proportionally among generators running in parallel.
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