Product Details：

Woodward 5403-975 is a microprocessor-based 505E digital turbine controller, designed for single-valve steam turbine control, supporting single extraction, admission and split-range actuator configuration. It serves as the core speed and load control unit for steam turbines, responsible for turbine startup, shutdown, acceleration, deceleration, constant speed control and constant load control. It collects speed signals from magnetic pickups, analog process signals and discrete switch status, and outputs control signals to drive hydraulic actuators to adjust the steam inlet valve opening, so as to stabilize turbine speed and generator output power. It is equipped with a built-in operator panel with two-line 24-character LCD display and multi-function keypad, engineers can set parameters, view real-time operating data, check alarm logs and perform local operation on site. It has rich I/O resources, including discrete inputs, discrete outputs, analog inputs, analog outputs and dual actuator output channels, which can meet the signal acquisition and control output requirements of turbine auxiliary systems. It supports RS232 and RS422 serial communication with Modbus protocol, and can realize data interaction with DCS system, upper computer configuration software and remote monitoring platform. It integrates comprehensive fault self-diagnosis and overspeed alarm logic, it can detect speed signal loss, actuator abnormality, power failure and internal hardware fault, trigger alarm and safe shutdown protection according to preset logic. It adopts compact panel mounting structure, suitable for installation in turbine local control cabinet and central control room. It is widely used in power generation, petrochemical and chemical plants with steam turbine generator sets, steam turbine driving compressors and pumps, used for new unit construction, old governor transformation and spare parts replacement. It is a mainstream digital governor for small and medium-sized steam turbine control.

Key specifications：Woodward 5403-975 505E turbine controller,24VDC power supply,dual actuator outputs,Modbus RS232/RS422,local LCD keypad,panel mount. Operating temperature range: -20°C to +60°C. It supports speed calibration, actuator loop test and communication configuration during maintenance.

This 505E controller cooperates with magnetic pickups, hydraulic actuators and field transmitters to build complete steam turbine speed and load closed-loop control system. The front panel HMI helps operators monitor turbine running status and adjust control parameters conveniently.