Woodward 5501-471 NetCon SIO Module 00:20

Adopts a digital PID control algorithm to real-time collect signals from sensors (e.g., rotational speed, pressure, temperature), output control signals through calculations, and adjust actuators (e.g., fuel valves, servo motors) with a control accuracy of ±0.1%.

Supports automatic/manual mode switching. In manual mode, output values can be directly set via external knobs or communication interfaces, facilitating debugging and emergency operations.

Supports various input signals: analog quantities (4-20mA, 0-10V) and digital quantities (pulse signals, switch signals), compatible with devices like rotational speed sensors (magnetoelectric, photoelectric) and pressure transmitters.

Equipped with signal filtering and fault diagnosis functions, it can automatically identify issues such as sensor disconnection or abnormal signals, and trigger alarms or protection actions.

Standard RS485 communication interface (Modbus protocol), with optional Ethernet interface, supporting data interaction with PLC, DCS systems, or host computers for remote monitoring and parameter modification.

Supports redundant configuration, enabling hot backup with another module to enhance system reliability.

Operating temperature range: -40°C to +70°C, adapting to harsh industrial environments with high temperatures and vibrations.

Protection level up to IP54, resisting dust and water spray, suitable for on-site installation.

Receives sensor signals (e.g., engine rotational speed pulses, pressure analog quantities) through input interfaces, converts them via A/D, and sends them to the microprocessor for filtering and linearization.

The microprocessor compares real-time signals with set values based on preset control logic (e.g., rotational speed control, power balance), calculates output values through the PID algorithm, and adjusts actuators (e.g., fuel control valve opening) to stabilize controlled parameters (e.g., rotational speed) at target values.

Exchanges data with host computers or other modules via communication interfaces, receiving remote set values, uploading operating status, or interlocking with other control systems (e.g., safety interlock systems).

Built-in watchdog timer and hardware diagnostic circuit. If CPU abnormalities, power failures, or input signal overrange are detected, it automatically switches to a safe output mode (e.g., closing fuel valves) and triggers alarms.

Gas turbine control: Regulates fuel gas flow, maintains stable rotational speed, and coordinates with synchronizing and grid-connected systems.

Diesel engine speed regulation: In marine power systems, automatically adjusts the throttle according to load changes to avoid overspeed or stalling.

Steam turbine protection: Interlocks with overspeed protection devices to quickly cut off steam supply when rotational speed exceeds the threshold.