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3 year warranty

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Woodward Energize-to-Trip ProTech 203 Overspeed Trip Device 9907-145 that senses prime mover speed through three MPUs. Features Audible and Visible Alarm Systems.



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  • Part Number: 9907-145
  • SKU: 9907145WO
  • Manufacturer: Woodward
  • Series: ProTech 203 Overspeed Protection

9907-145 Technical Specifications

Dimensions W19in x H12.244in x D5.62in
Features CPU and MPU Failure Indication
Input Voltage 120 Vac/dc = 88–132 Vac/90–150Vdc, 7.25W
Keypad/Display 1 Keypad and Display per Module
Manual 85191
Manufacturer Woodward
Model Energize-to-Trip
Operating Temperature –25 to +60 °C (–13 to +140 °F)
Standards NEMA 4 and IP54

Product Description

Woodward overspeed protection device model 9907-145 uses magnetic pickups (MPUs) to monitor prime mover speed. This ProTech energize-to-trip system has several features that make programming and monitoring MPU functions easy.

MPUs in the 9907-145 system are interfaced with three separate speed-sensing units, each with its own operator interface. On each interface is a separate LED to indicate the status of that unit’s MPU. If an MPU or its wiring fails, the corresponding LED will illuminate. With the 9907-145 model operators have the option to configure each unit to either output both an alarm and a trip signal, or to output only an alarm if that unit’s MPU is lost.

MPU Fail Timeout, MPU Failed Setpoint, and Trip on MPU Failure are a few of the 9907-145 tunable parameters. A complete list of tunable parameters and their functions is in Woodward ProTech manual 85191. These parameters are both programmed and monitored with the keypad and LCD on each operator interface. Speed-sensing units are programmed individually but must be programmed with identical trip points.

Units are programmed separately due to the modular design of model 9907-145, a design that permits features such as a two-out-of-three voting configuration and hot replacement of any individual speed-sensing unit. For these reasons, there is a separate 120 Vac/dc power supply (voltage range of 88–132 Vac/90–150 Vdc, 7.25 W) for each unit.

Reviews For 9907-145

Internal Review

The ProTech 203 system 9907-145 can be operated in one of two modes: MONITOR or PROGRAM. Although the system will “run” in either mode, it is recommended that the unit be placed in the PROGRAM mode only during configuration and then placed in the MONITOR mode during normal operation.

Repair Services For 9907-145

Type Lead Time Price Action
Repair Service 1-2 weeks $4904

Our highly skilled technicians can repair your 9907-145. All of our repairs come with a 3 Year AX Control Warranty. Please contact us for additional information about our repair process. To receive the repair pricing and lead time listed above please process your repair order via our website. The following repair options may be available upon request:

  • 48-72hr Rush Repair
  • Detailed Repair Reports
  • AX Control Certificate of Warranty

AX Control Warranty Info

All products we sell are backed by our unparalleled warranty. A warranty certificate will be provided with your order upon request.
All PLCs, HMIs, and Turbine Control Boards: 3 Years
All AC/DC and Servo Drives: 2 Years
All Motors: 1 Year
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9907-145 Manuals, White Papers, Data Sheets, and Troubleshooting