WOODWARD 5415-623 is a high‑precision digital speed/load controller and actuator driver module for diesel/gas engines and steam/gas turbines. It is a compact, rack‑mountable microprocessor‑based unit designed for precision speed regulation, load sharing, and actuator control in power generation, oil & gas, and industrial plants. Commonly paired with Woodward 505/505E governors, it serves as a drop‑in replacement for legacy controls in both new builds and retrofits requiring high accuracy and reliability.
General Description
The WOODWARD 5415-623 is a precision digital governor and I/H (electro‑hydraulic) driver that accepts high‑frequency speed signals (500–12000 Hz) and analog setpoints (4–20 mA / 1–5 Vdc). It converts electronic control commands into precise hydraulic or actuator drive signals for turbine inlet valves, fuel racks, or governor actuators. The controller supports isochronous (zero droop) and droop modes for standalone or grid‑parallel operation, with built‑in overspeed protection, speed/load limiting, startup ramping, and fault diagnostics. It includes 8 digital inputs / 8 digital outputs and 4 analog inputs / 3 analog outputs, with RS‑485 / Modbus RTU communication for DCS/PLC integration. The unit operates on 24 VDC ±10%, features galvanic isolation, and withstands harsh industrial environments.
Main Features
Precision digital speed/load controller + actuator driver for engines and turbines
Electro‑hydraulic (I/H) conversion (electric signal → hydraulic pressure/actuator drive)
Dual control modes: isochronous (zero droop) and droop (load sharing)
Speed input: 500–12000 Hz; analog setpoint: 4–20 mA / 1–5 Vdc
I/O: 8DI / 8DO + 4AI / 3AO for control and monitoring
Communication: RS‑485 / Modbus RTU for DCS/PLC integration
Built‑in overspeed trip, speed/load limit, and fault diagnostics
Galvanic isolation (up to 1500 V); 24 VDC ±10% power supply
Rugged rack‑mount design; wide temperature range: ‑40 °C to +85 °C
Technical Parameters
Model: 5415-623
Type: Digital Speed/Load Controller / I/H Driver Module
Applicable Prime Movers: Diesel/gas engines, steam/gas turbines, gensets
Speed Input Range: 500–12000 Hz
Analog Setpoint: 4–20 mA / 1–5 Vdc
Digital I/O: 8 inputs / 8 outputs
Analog I/O: 4 inputs / 3 outputs
Communication: RS‑485, Modbus RTU
Power Supply: 24 VDC ±10%, 5 A max
Operating Temperature: -40 °C to +85 °C
Storage Temperature: -40 °C to +85 °C
Dimensions: 145 × 90 × 35 mm
Weight: Approx. 0.45 kg
Installation: Standard cabinet rack mount
Certifications: CE, RoHS compliant
Application Scope
Primarily used for precision speed regulation, load control, and electro‑hydraulic signal conversion of industrial diesel/gas engines, steam/gas turbines, and generator sets in power, oil & gas, and petrochemical plants. It executes prime mover startup/shutdown, overspeed protection, load sharing, and remote monitoring, integrating seamlessly with Woodward 505/505E governors and DCS to form a complete turbine/engine control system for both new installations and legacy system upgrades。
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