2. General Description

• Part Number: 5437-027

• Manufacturer: Woodward (USA)

• Product Type: Digital Turbine Governor / Speed Controller (505 platform, high‑performance variant)

• Application: Steam turbines (single/dual actuator), gas turbines, diesel/gas engines, gensets, compressors

• Control Core: 32‑bit microprocessor, enhanced real‑time OS

• Control Modes: Isochronous (0 droop), droop, load, inlet pressure, process control, dual‑valve (governor + intercept)

• Signal Interface: 4–20 mA / 1–5 Vdc analog; 24 Vdc discrete I/O; optional Modbus/Ethernet

• Compatibility: Woodward 505/505E/505H, I/H converters, hydraulic actuators, DCS, PLC

• Mounting: Panel / DIN rail, industrial metal enclosure (conformal coated)

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

3. Key Features

• High‑Performance 505 Platform – Upgraded processing for faster response & tighter regulation

• Precision Speed Control – ±0.01% accuracy; isochronous/droop for grid‑parallel or islanded gensets

• Dual‑Actuator Steam Turbine Support – Governor + intercept valve control (critical for extraction/condensing turbines)

• Flexible I/O & Communications – Analog (4–20 mA) + discrete 24 Vdc; Modbus RTU/TCP, Ethernet IP (optional)

• Integrated Turbine Protection – Overspeed (2‑stage), underspeed, overpressure, loss‑of‑signal, fault alarms

• Engine/Genset Functions – Synchronization, load sharing, reverse power protection, fuel limiting

• Harsh Environment Rated – −40 °C to +85 °C, shock/vibration resistant, conformal coated PCB

• ToolKit Software – PC‑based configuration, tuning, trending, and fault diagnostics

4. Technical Specifications

• Part Number: 5437-027

• Power Supply: 24 Vdc ±10%, 50 W max (higher than standard 505)

• Speed Range: 0–12,000 RPM (software configurable; MPU input)

• Regulation Accuracy: ±0.01% speed; ±0.1 Hz frequency

• Analog Inputs: 6 × 4–20 mA / 1–5 Vdc (speed, load, pressure, setpoint, process)

• Analog Outputs: 3 × 4–20 mA (actuator command, monitor, process)

• Digital Inputs: 12 × 24 Vdc (start/stop, trip, mode, alarms, permissives)

• Relay Outputs: 8 × relay (5 A, 250 Vac) – trip, alarm, control, interlock

• Actuator Interface: Direct to Woodward I/H converters & hydraulic actuators

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

• Dimensions: 170 × 120 × 55 mm (W×H×D)

• Weight: Approx. 1.5 kg (3.3 lbs)

• Enclosure: Metal, conformal coated, IP30

5. Applications

• Industrial Steam Turbines – Single/dual‑actuator speed/load control (extraction/condensing)

• Gas Turbines – Industrial power generation, mechanical drives (compressors, pumps)

• Diesel/Gas Engine Gensets – Grid‑parallel or islanded operation, load sharing

• Compressor Drives – Oil/gas, petrochemical, pipeline compressors

• Hazardous Locations – Class 1 Div 2 (refineries, offshore platforms, chemical plants)

6. Ordering Information

• Part Number: 5437-027

• Description: Woodward 5437-027 Digital Governor/Controller (505 High‑Performance Series), 24 Vdc, Dual‑Actuator Steam Turbine & Universal Prime Mover Speed/Load Control, Isochronous/Droop, Extended I/O, Turbine Protection, Modbus/Ethernet Comms