WOODWARD 9907 Series Controllers/Governors (9907-165/9907-149/9907-162)
The 9907 series is a Woodward 505/505E series digital turbine speed controller, based on a 32-bit microprocessor, designed for precise control of speed, load, extraction/inlet pressure of steam turbines/gas turbines/expanders. It is widely used in industries such as power generation, petrochemicals, and metallurgy.
1、 Model Overview and Positioning
Core differences in model positioning
9907-165 505E Advanced Type, dual actuator for extraction/inlet steam turbine, extended I/O, AC/DC wide power supply
9907-149 505 basic type, universal turbine/small turbine standard I/O, DC24V, economy version
9907-162 505 standard type, single/split range actuator turbine with complete basic functions, panel friendly DC24V

2、 Product information (three commonalities)
Manufacturer: WOODWARD (Woodward, USA)
Series: 505/505E Digital Governor (9907 is the material prefix)
Core functions: speed control, load control, synchronization/grid connection, overspeed protection, extraction/inlet pressure control
Control algorithm: adaptive PID, fully digital signal processing, field programmable
Display/Operation: Two line 24 character LED display+30 key membrane keyboard
Certification: CE, UL, CSA; Partial model SIL2/SIL3 safety certification
3、 Technical parameters and specifications (by model)
1) 9907-165 (505E, dedicated for extraction/intake)
Power supply: 180-264 VAC (47-63 Hz) or 24 VDC
Output of actuator: 2 channels (0-200 mA, driving servo valve)
Analog input: 6 programmable channels (4-20 mA)
Switch input: 16 channels (4 dedicated, 12 programmable)
Switch output: 8-way relay (250 VAC/5 A)
Communication: RS-232/422/485, Modbus RTU, Ethernet (optional)
Working temperature: -25 ℃~+65 ℃
Dimensions (width x height x depth): 356 x 279 x 102 mm
Weight: Approximately 4.5 kg (<10 lbs)
2) 9907-149 (505, universal basic type)
Power supply: 24 VDC ± 10%, 1 A
Output of actuator: 2 channels (0-200 mA)
Analog input: 4 channels (4-20 mA)
Switch input: 8 programmable channels
Switch output: 4-channel relay
Communication: RS-232/485, Modbus
Working temperature: -20 ℃~+60 ℃
Size: 254 × 178 × 76 mm
Weight: Approximately 3.2 kg
3) 9907-162 (505, standard type)
Power supply: 18-32 VDC (typical 24 VDC), 1 A
Output of actuator: 2 channels (0-200 mA)
Analog input: 6 programmable channels (4-20 mA)
Switch input: 16 channels (4 dedicated, 12 programmable)
Switch output: 8-way relay
Communication: RS-232/422/485, Modbus RTU
Working temperature: -20 ℃~+60 ℃
Size: 254 × 178 × 76 mm
Weight: Approximately 4.13 kg
4、 Usage scenarios
Common scenarios
Electricity: speed regulation, grid connection, and load distribution of thermal power/steam turbines; Generator overspeed protection
Petrochemical: Refining/Chemical Steam Turbine, Compressor Unit, Turboexpander Control
Metallurgy: Steel rolling/oxygen production driven turbine, backup generator control
Industrial Drive: Speed Regulation and Safety Protection of Large Pumps/Fans/Compressors
Model focus
9907-165: Extraction/back pressure steam turbine (requiring simultaneous control of speed and extraction pressure), dual actuator system
9907-149: Small steam turbines, single actuators, budget sensitive projects (such as small power plants, industrial turbines)
9907-162: Standard single axis turbine, split range actuator, universal turbine (most commonly used, functionally balanced)
5、 Size and Weight (Summary)
table
Model size (width x height x depth) Weight
9907‑165 356 × 279 × 102 mm ~4.5 kg
9907‑149 254 × 178 × 76 mm ~3.2 kg
9907‑162 254 × 178 × 76 mm ~4.13 kg
6、 Related models (9907 series)
9907-14:505E redundant type, triple TMR, high safety level (SIL3)
9907-1183:505E Enhanced, Extended Communication (Profinet/Ethernet), Large I/O Capacity
9907-018: 2301A series, simple speed regulator, single actuator, low cost
9905-017:505 old model, compatible with old systems and spare parts replacement
7、 Core advantages
High reliability: industrial grade wide temperature range, anti vibration, EMI/RFI shielding, suitable for harsh working conditions
Precision control: 32-bit processor, millisecond response, speed accuracy ± 0.01%
Flexible configuration: on-site menu programming, supporting multi-mode switching of speed/load/pressure
Safety protection: triple overspeed protection, fault self diagnosis, relay hard contact output
Easy to maintain: panel visualization operation, parameter storage/backup, support for hot swapping

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