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3 year warranty

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Woodward ProTech 203 Model 9907-085 with three identical, enclosed, independent, speed-sensing units for monitoring prime mover speed and activating trip relays



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  • Part Number: 9907-085
  • SKU: 9907085WO
  • Manufacturer: Woodward
  • Series: ProTech 203 Overspeed Protection

9907-085 Technical Specifications

Dimensions W482.6mm x H310.4mm x D142.7mm
Features Key Lock
Input Voltage 220 Vac = 180–264 Vac, 7.25W
Keypad/Display 12 Keys per Module
Manual 85203
Manufacturer Woodward Governor
Model Energize-to-Trip
NEMA Rating 4 for Outdoor Use
Operating Temperature –25 to +60 °C
Weight Approx 7.26Kg

Product Description

ProTech 203 overspeed protection model 9907-085 has an accuracy rating of 0.05% of point + 2 Hz over the operating temperature range (–25 to +60 °C). This device detects overspeed conditions by using three individual speed-sensing units to monitor prime mover speed using magnetic pickups (MPUs).

The three units then perform their own speed calculations, and a two-out-of-three hardware vote determines whether a trip relay is activated. It takes two units to detect overspeed conditions to trip the system. Detection from only one will trip that unit, but the other two will take over control of the process and the device will continue running. The total system response time, from speed sampling to trip relay activation, is 40 ms max.

Trip set points for the three units are programmed for each speed-sensing unit individually but must be programmed identically. Woodward Manual 85203 details the 9907-085 tunable parameters and contains a programming worksheet.

This ProTech system permits fast error identification and troubleshooting with its various error and failure indicators. Each speed-sensing unit operator interface has an LCD where error codes are displayed if something needs attention. Situations such as an MPU failure, CPU failure, or a tripped unit are announced through separate LEDs. For some events requiring attention, a tripped unit, for example, will also trigger an alarm output.

This 220 Vac overspeed protection device is sensitive to electromagnetic interference and vibration. ProTech 203 manual 85203 should be consulted for a full list of location considerations and safety precautions.

Reviews For 9907-085

Internal Review

Each subsystem can be replaced (after disconnecting the supply power at the external disconnecting means) while the other two subsystems are powered without tripping the prime mover. - AX Control Techs

Repair Services For 9907-085

Type Lead Time Price Action
Repair Service 1-2 weeks $5557

Our highly skilled technicians can repair your 9907-085. 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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