2. General Description

• Part Number: 5430-856

• Manufacturer: Woodward (USA)

• Product Type: Digital Speed Controller / Extender Card

• Application: Diesel/gas engines, steam/gas turbines, gensets, compressors

• Control Modes: Isochronous (zero droop) or droop speed/load control

• Signal I/O: 4–20 mA / 1–5 Vdc analog, discrete 24 Vdc I/O

• Compatibility: Woodward 505 / 505E / 505XT governors, MicroNet, easYgen systems

• Mounting: Panel or DIN rail

• Certifications: CE, UL, RoHS, Class 1 Div 2 (hazardous areas)

3. Key Features

• Precision Speed Control – Closed‑loop regulation for turbines/engines

• Dual Control Modes – Isochronous (constant speed) or droop (load sharing)

• Flexible Analog Inputs – 4–20 mA / 1–5 Vdc for speed/load setpoints

• Engine Protection – Overspeed, underspeed, overcurrent, fault alarms

• Load Sharing Capability – Synchronize and balance load across multiple units

• Extender Card Function – Expands I/O for 505‑series governors

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

• Communication Ready – Works with Woodward configuration software

4. Technical Specifications

• Part Number: 5430-856

• Power Supply: 24 Vdc ±10%, 25 W max

• Speed Range: 0–10,000 RPM (configurable)

• Control Accuracy: ±0.01 Hz (frequency), ±0.1% speed regulation

• Analog Inputs: 2 × 4–20 mA / 1–5 Vdc (configurable)

• Analog Outputs: 1 × 4–20 mA (speed/load monitor)

• Digital Inputs: 6 × 24 Vdc (start/stop, alarms, mode select)

• Relay Outputs: 4 × relay (5 A, 250 Vac) – alarms, trip, control

• Control Output: PWM or 4–20 mA to Woodward 505 governors

• Operating Temperature: −40 °C to +85 °C

• Dimensions: 140 × 100 × 45 mm (W×H×D)

• Weight: Approx. 0.9 kg (2.0 lbs)

• Enclosure: Industrial metal, conformal coated

5. Applications

• Prime Mover Speed Control – Diesel/gas engines, steam/gas turbines

• Generator Sets – Grid‑parallel or islanded operation

• Compressor Control – Oil/gas industry, pipeline compressors

• Load Sharing Systems – Multi‑unit genset plants

• Hazardous Locations – Offshore platforms, refineries (Class 1 Div 2)

6. Ordering Information

• Part Number: 5430-856

• Description: Woodward 5430-856 Digital Speed Controller / Extender Card, 24 Vdc, Isochronous/Droop Mode, 4–20 mA I/O, for Diesel/Gas Engine & Steam/Gas Turbine Speed Control & Load Sharing