Woodward 9907-163 505 Digital Governor Turbine Control
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Product origin New/used
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Woodward 9907-163 505 Digital Governor Turbine Control1. Basic Product Identific
Woodward 9907-163 505 Digital Governor Turbine Control
Woodward 9907-163 505 Digital Governor Turbine Control
1. Basic Product Identification
Official part number: 9907-163Manufacturer: Woodward USAProduct line: Classic 505 digital steam turbine governor controllerProduct positioning: Single / split dual actuator dedicated speed-load governor, applied to back-pressure, condensing, extraction steam turbines, small turbogenerators and industrial process expandersMain hardware revisions: Rev L, Rev MConfiguration & monitoring software: 505View, OpView, supporting parameter offline upload/download, real-time trend tracking and firmware upgradeHazardous area grade: Class I Div 2, ATEX/IECEx Zone 2 certified unit, standard cabinet panel mounting typeOfficial operation manual reference document: Woodward Manual 85017V1
2. Core Control Logic & Operation Modes
Adopts 32-bit high-speed microprocessor core, core control algorithm based on Low Signal Selection (LSS) logic. Three independent calculation channels jointly determine valve output: speed/load PID loop, auxiliary PID loop, valve position limiter loop.Complete multi-mode regulation functions: isochronous constant speed control, droop load sharing for parallel generators, automatic synchronization sequence, cascade pressure closed-loop control, extraction/ inlet pressure limiting, local manual valve position control.Built-in full automatic turbine startup and shutdown sequence logic, with programmable warm-up speed ramp, acceleration ramp, constant speed holding stage, overspeed trip interlock and pre-start permission interlock; supports hardwire or bus remote start-stop commands.PID parameter full-range adjustable: proportional band 0.1%–1000%, integral time 0.01–100s, derivative time 0–25s; independent tuning for speed loop, auxiliary pressure loop and cascade control loop respectively.
3. Input Channel Hardware Configuration
Speed detection input
Dual isolated independent speed pickup channels, compatible with passive magnetic MPU speed probes and active Hall speed sensors. Frequency acquisition range 0.5Hz–25000Hz, adapt to turbine speed up to 15000RPM; MPU effective input voltage range 1–25Vrms.
Analog analog inputs
Four configurable 4–20mA analog input channels, used for pressure, temperature, generator power feedback signals; expandable with external modules for RTD / thermocouple bearing temperature collection.
Digital discrete inputs
Eight isolated 24VDC dry contact digital input terminals, assigned to startup permission, emergency shutdown, remote mode switching, fault interlock feedback, limit switch state collection.All field input circuits integrate surge suppression, reverse polarity protection and galvanic isolation to eliminate ground loop interference in power plant and engine room environments.Built-in auxiliary 24VDC power supply inside the controller, maximum output 200mA for powering field transmitters and sensors.
4. Actuator & Output Signal Resources
Actuator driving outputs
Two independent configurable actuator outputs, selectable 4–20mA or 0–200mA driving signal, with built-in valve linearization correction curve. The second actuator output can be switched to analog monitoring signal output when split-range control is not required. Each channel has over-current and open-circuit self-diagnosis protection, triggering fault alarm when abnormal load occurs.
Analog monitoring outputs
Six isolated 4–20mA analog output channels, transmitting real-time speed, generator load, governor valve position, extraction pressure and other operating parameters to DCS, field recorders and local meters.
Relay contact outputs
Eight Form-C dry contact relay outputs, two fixed dedicated relays for overspeed trip and general fault alarm; the remaining six relays are fully programmable for running status indication, warning signals and auxiliary equipment interlock control. Single relay contact capacity 5A@250VAC or 5A@30VDC.
5. Communication Interface Specifications
Front panel RS232 service port: for local PC connection, parameter backup, real-time debugging and firmware flashing, exclusive on-site maintenance channel.Rear panel isolated RS485 bus port: dual protocol support Modbus RTU / Modbus ASCII, bidirectional data exchange with plant DCS, PLC and remote monitoring platform.Optional extended communication module realizes Modbus TCP Ethernet access and Woodward proprietary CANopen bus interconnection, supporting multi-unit governor load balance coordination.All serial communication ports support baud rate adjustment from 300bps to 115200bps, with communication timeout fault self-recording function.
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