Woodward 5405-818 505 Turbine Controller

Technical Specifications

Model:5405-818

Brand:Woodward

Product type:505 series digital turbine governor controller

Power supply:DC24V

Control function:Speed PID regulation,load control,start/stop sequence management,interlock & trip protection,actuator drive output,local operator panel

Communication:Modbus,serial port

Mounting:Rack mount

Operating temperature:-40~70℃

Relative humidity:5~95% non-condensing

Weight:4.13kg

Certification:CE,UL

System compatibility

5405-818 belongs to Woodward 505 turbine control system family,designed for single-valve steam turbines,single extraction/admission or split-range actuator configurations.Widely used in steam turbine generator control cabinets.This is a discontinued legacy turbine governor controller for power unit maintenance spare replacement.

Function

5405-818 serves as high precision Woodward 505 turbine governor controller.It collects speed signals from magnetic pickup sensors,executes high-speed PID algorithm to adjust valve actuator for stable turbine speed and load control.Equipped with front 2-line LCD display and keypad for on-site parameter setup,monitoring and fault checking.It integrates turbine start-up logic,overspeed protection and emergency trip functions.Built-in hardware watchdog circuit to avoid abnormal control output.It acts as the core speed & load control unit of steam turbine generator system.

Installation

Mount 5405-818 inside turbine control cabinet.Complete speed sensor,actuator and backplane wiring according to wiring drawing.Backup turbine parameters before replacement,verify system boot and governing function after power-up.

Interface

‑Magnetic pickup speed input terminal

‑Actuator drive output port

‑Digital I/O terminal block

‑Serial communication port

‑Front panel HMI keypad & LCD display

Circuit feature

Rugged metal casing design,equipped with surge and ESD suppression circuit.Stable speed signal acquisition,strong anti-interference performance for power plant cabinet environment.Standard factory firmware preloaded.

Feature

5405-818 is obsolete Woodward series spare part.Typical failures include speed signal loss,unstable governing,display failure,turbine trip.Check controller,terminal block and connector pins before replacement.This controller must match corresponding turbine system,direct substitution without parameter backup and function test is not recommended.

Diagnostic

When speed measurement fault,governor oscillation or system trip occurs,the controller triggers corresponding alarm codes and sends fault signal to turbine control system.

Built‑in function

Turbine speed and load control,start-stop sequence logic,overspeed trip protection,local HMI operation,Modbus remote communication,used as Woodward 505 series digital turbine governor controller spare replacement.

Product Brief

5405-818 is Woodward old 505 series digital turbine governor controller for single valve steam turbine generator sets and power automation equipment.Confirm system model matching before ordering.ESD protection required during handling and installation.