Woodward 9907-167

Technical Dossier

Product Details And Specifications

WOODWARD 9907 Series Technical Notes

The WOODWARD 9907 Series represents one of the most widely deployed digital governor and control module platforms in global heavy industry. Installed across petrochemical refineries, nuclear power auxiliary systems, offshore gas compression platforms, and large-scale thermal power stations, the 9907 Series has established a decades-long track record as a primary speed and load control solution for turbines, engines, and rotating machinery. Its modular architecture, deterministic control response, and compatibility with legacy WOODWARD governor infrastructure have made it the default specification in long-lifecycle plant environments where replacement cycles span 15–30 years. DriveKNMS maintains an active inventory of 9907 Series modules to support both operational spares and emergency replacement requirements.

The Evolution of 9907 Series Architecture

The WOODWARD 9907 Series was introduced as a digital successor to the earlier analog EG and UG governor families, transitioning mechanical-hydraulic control logic into programmable digital platforms. Early 9907 variants operated on proprietary WOODWARD communication protocols with limited external interfacing. Mid-generation units introduced analog I/O expansion capability and RS-232/RS-485 serial communication, enabling integration with SCADA and DCS environments. Later revisions incorporated CAN bus and Modbus RTU support, broadening compatibility with third-party control architectures. The series spans single-channel and redundant-channel configurations, with some models supporting hot-standby failover for critical turbine applications. As the 9907 Series has entered its mature-to-end-of-life phase, WOODWARD has transitioned new designs toward the 5009 and MicroNet platforms; however, the installed base of 9907 units in active service remains substantial, and direct module replacement remains the preferred maintenance strategy for plants unwilling to undertake full governor system overhauls. DriveKNMS provides lifecycle extension support for all 9907 variants, including models formally discontinued by WOODWARD.

9907 Series Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly sourced models within the WOODWARD 9907 Series. Each entry reflects the module's primary control or I/O function within a governor system architecture.

9907-167: Digital governor control module, speed/load regulation for turbine applications.
9907-168: Digital governor module, enhanced analog output configuration for steam turbines.
9907-169: Speed control module with dual-channel input for redundant MPU pickup signals.
9907-172: Load sharing and speed control module for parallel generator sets.
9907-173: Digital governor with integrated actuator driver output, 4–20 mA command.
9907-174: Turbine control module, configurable droop and isochronous modes.
9907-175: Governor module with RS-232 serial communication interface for remote setpoint.
9907-176: Digital speed controller, gas engine variant with knock-detection input compatibility.
9907-177: Multi-input governor module supporting both MPU and proximity probe speed sensing.
9907-178: Analog I/O expansion module for 9907 Series governor base units.
9907-179: Power supply module, 24 VDC regulated output for 9907 Series backplane.
9907-180: Digital governor module with Modbus RTU slave interface, 9600–115200 baud.
9907-181: Redundant control module, hot-standby configuration for critical turbine duty.
9907-182: Actuator interface module, compatible with WOODWARD EG-3P and series actuators.
9907-183: Discrete I/O module, 16-channel digital input/output for governor interlock logic.
9907-184: CAN bus communication adapter for 9907 Series integration with MicroNet systems.
9907-185: Temperature input module, thermocouple and RTD signal conditioning for exhaust monitoring.