Description
Woodward 9907-149
Technical Specifications: Rated operating power supply: 24 VDC industrial power supply Operating temperature range: -40 ℃ to +70 ℃ Storage temperature range: -40 ℃ to +85 ℃ Relative humidity: 5%–95% non-condensing Speed input type: Magnetic pickup sine wave pulse signal Effective frequency range: 0 Hz – 10000 Hz Analog input specification: 4–20 mA standard industrial signal Analog output specification: 4–20 mA adjustable control signal Discrete input & relay output multi-channel configuration Communication protocol: Modbus RTU serial communication Installation form: Standard industrial rack plug-in Protection grade: IP20
Functional Features: Precision closed-loop speed governing control Automatic generator active and reactive load regulation Independent hardware overspeed protection interlock Configurable unit startup, acceleration and shutdown logic Real-time fuel actuator positioning drive control Full hardware self-diagnosis and fault judgment function Complete event sequence recording and fault data storage Remote parameter modification and program downloading Hardware-level anti-jamming and signal filtering processing Single-point fault isolation without system-level failure
Application Scenarios: Thermal power plant steam turbine governor control cabinet Combined cycle power plant gas turbine control system Industrial large diesel generator unit automation cabinet Mining and oil field prime mover power control system Standby generator set intelligent regulation equipment room
Performance Parameters: Static speed control accuracy ≤ ±0.25% rated rotational speed Dynamic response time ≤ 1 millisecond Load disturbance adjustment response rapid and stable Fully compliant with IEC industrial EMC anti-interference standards Supports 7×24 hours full-load continuous unattended operation Zero drift long-term operating stability under rated temperature range
Material Composition: High-strength fiberglass epoxy multilayer PCB substrate Industrial-grade 32-bit high-speed control microprocessor High-precision signal sampling and operational amplifier chips TVS surge suppression and electromagnetic filtering components Gold-plated high-precision backplane contact terminals Cold-rolled steel anti-corrosion metal front panel Whole-board industrial three-proof conformal coating
Structural Features: Standard vertical rack plug-in modular structure Front panel independently integrated power, run and fault LED indicator area Rear full gold-plated backplane docking interface ensures low contact resistance Internal circuit physical separation of analog acquisition area and digital operation area Front panel equipped with elastic anti-loose mechanical locking buckle Built-in independent heat dissipation channel layout Integrated shielding structure to suppress internal signal crosstalk
Working Principle: The module obtains real-time rotor speed pulse signals from field magnetic pickup sensors. The internal high-speed processor compares the actual speed value with the preset target speed value, calculates dynamic deviation through PID regulation algorithm, and outputs analog or switch control signals to fuel actuators and governor actuators. The module continuously monitors input signal status, power supply state and internal chip operating status. Once overspeed, signal loss or hardware abnormality occurs, the module immediately triggers protection interlock and uploads fault alarm information to the upper monitoring platform.
Installation Requirements: Install the module in the designated standard slot of Woodward industrial control rack Ensure the rear backplane connector is fully inserted and locked in place All speed signal cables adopt shielded twisted-pair wires with single-point grounding Signal wiring and high-power power cables are routed in separate bridge frames The cabinet protection grounding terminal must achieve reliable equipotential grounding Reserve upper and lower ventilation gaps to ensure natural heat dissipation Complete parameter configuration and loop calibration after installation
Precautions for Use: Completely cut off rack DC power supply before plugging and unplugging the module Must wear anti-static wristband and anti-static gloves during maintenance operations Strictly check signal wiring polarity to avoid reverse connection and burnout Prohibit access of overvoltage and overcurrent abnormal field signals Regularly check terminal fastening status to prevent poor contact from vibration Keep the inside of the cabinet dry and clean without dust accumulation and condensation Do not disassemble the module shell privately to avoid damage to internal shielding structure
