2. General Description

• Type: 505 Digital Microprocessor Controller (Steam Turbine Governor)

• Application: Single/dual‑actuator steam turbines (speed/load control)

• Control Modes: Speed control, load control, droop/isochronous, remote 4–20 mA/1–5 V setpoint

• Inputs: Speed (MPU), 4–20 mA analog, discrete 24 Vdc

• Outputs: 2 × analog (4–20 mA), discrete relays, RS232 communication

• Construction: Industrial metal housing, front‑panel LCD/keypad, DIN rail or panel mount

  

3. Key Features

• 505 Series OEM – Original Woodward digital governor for steam turbines

• Dual‑Actuator Support – Controls two valves (e.g., throttle + governor)

• Precision Speed Control – ±0.01% accuracy, MPU speed input

• Flexible Setpoints – Local keypad or remote 4–20 mA/1–5 V analog

• Isochronous/Droop Modes – For grid‑parallel or isolated operation

• Built‑in RS232 – For programming, monitoring, and HMI connection

• Industrial Durability – −40 °C to +85 °C, shock/vibration resistant

• CE/UL/RoHS – Global compliance

4. Technical Specifications

• Part Number: 5417-417

• Manufacturer: Woodward (USA)

• Product Type: 505 Digital Steam Turbine Governor

• Processor: 32‑bit microprocessor

• Speed Input: Magnetic pickup (MPU), 0–10 kHz

• Analog Inputs: 2 × 4–20 mA (setpoint/load)

• Analog Outputs: 2 × 4–20 mA (valve control)

• Discrete I/O: 8 × digital in (24 Vdc), 4 × relay out

• Communication: RS232 (DB9, 5417‑413 cable compatible)

• Power Supply: 24 Vdc ±10%, 50 W max

• Operating Temp: −40 °C to +85 °C

• Dimensions: 240 × 160 × 80 mm (W×H×D)

• Weight: Approx. 2.5 kg (5.5 lbs)

• Compatibility: 5417‑series cables (173/175/176/413), MicroNet systems

5. Applications

• Steam Turbine Control – Utility/industrial steam turbines (single/dual actuator)

• Power Generation – Grid‑parallel or isolated generator sets

• Oil & Gas – Compressor drive turbines, process steam turbines

• Industrial Plants – Cogeneration, district heating, and process steam systems

6. Ordering Information

• Part Number: 5417-417

• Description: Woodward 5417-417 505 Digital Microprocessor Controller, Steam Turbine Governor, 24 Vdc, RS232, for Single/Dual‑Actuator Steam Turbines