Woodward 9907 Series Modules – 9907-162

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 families in global heavy industry. Installed across petrochemical complexes, nuclear power stations, offshore platforms, LNG terminals, and large-scale refineries, the 9907 Series provides closed-loop speed and load control for gas turbines, steam turbines, diesel engines, and hydro turbines. Its modular architecture — combining dedicated CPU cards, analog/digital I/O modules, communication adapters, and power supply units — has made it the reference standard for turbine control system integrators operating under IEC 61511 and API 670 compliance frameworks. The series remains active in thousands of installed base sites globally, with many facilities operating units manufactured between the late 1990s and 2010s that require ongoing spare parts support.

The Evolution of 9907 Series Architecture

The 9907 Series was introduced as Woodward's response to the industry transition from analog hydraulic governors to fully digital, microprocessor-based control platforms. Early iterations of the 9907 architecture relied on proprietary backplane communication buses with fixed I/O slot assignments, limiting reconfiguration flexibility. As the series matured through successive hardware revisions, Woodward introduced enhanced CPU modules with expanded memory, faster scan cycles, and support for MODBUS RTU and later MODBUS TCP/IP communication protocols.

Compatibility note: 9907 Series modules are not directly interchangeable with the earlier 9905 Series or the later 5009 Series without firmware and wiring harness modifications. Slot-specific backplane addressing must be verified against the original system configuration file before any module substitution.

9907 Series Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly stocked models within the Woodward 9907 Series. Each unit is classified by primary function. Models marked as discontinued remain available through MRO channels.

Controllers & CPU Modules

• 9907-162: Digital governor control module; primary CPU for turbine speed/load regulation.
• 9907-164: Enhanced digital governor; expanded I/O capacity over 9907-162 baseline.
• 9907-165: High-speed governor CPU; reduced scan cycle for fast-response turbine applications.
• 9907-167: Redundant CPU module; hot-standby failover for critical process continuity.
• 9907-168: Governor controller with integrated MODBUS RTU communication port.
• 9907-169: Advanced governor CPU; supports dual-fuel engine control configurations.

Analog Input / Output Modules

• 9907-838: Analog input module; 8-channel, 4–20 mA / 0–10 V configurable per channel.
• 9907-840: Analog output module; 4-channel isolated current output for actuator drive signals.
• 9907-842: High-resolution analog I/O combo; 12-bit ADC, suitable for valve position feedback.
• 9907-844: Thermocouple input module; 8-channel, supports J/K/T/E type with CJC compensation.

Digital Input / Output Modules

• 9907-836: Digital input module; 16-channel, 24 VDC discrete signal acquisition.
• 9907-837: Digital output module; 16-channel relay output, 2A per channel rated.
• 9907-839: Mixed DI/DO module; 8 inputs + 8 outputs, compact slot-saving configuration.

Communication & Network Adapters

• 9907-950: MODBUS TCP/IP Ethernet communication adapter; DCS integration gateway.
• 9907-952: DeviceNet communication module; legacy PLC network connectivity.
• 9907-954: PROFIBUS DP adapter; supports GSD file-based configuration for Siemens DCS environments.

Power Supply Modules

• 9907-205: Primary power supply module; 24 VDC input, regulated backplane power distribution.
• 9907-207: Redundant power supply; parallel operation with 9907-205 for N+1 redundancy.
• 9907-209: Wide-range input PSU; accepts 18–36 VDC, designed for battery-backed UPS environments.

Sourcing Hard-to-Find & Obsolete 9907 Series Parts

Q: How is condition confirmed before quotation?
A: Available condition, photos, test records and documentation are checked according to the requested model and sourcing channel before a formal RFQ response.

Quality Control for the 9907 Series Range

The Woodward 9907 Series employs a proprietary backplane bus architecture with tight timing tolerances between CPU and I/O modules. Standard bench testing procedures are insufficient to validate 9907 module integrity; DriveKNMS applies a dedicated test protocol developed specifically for this series.