9905-873

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Model 9905-873 three units are connected in a two-out-of-three voting configuration so that if any single unit fails, the ProTech system will still provide the correct output.

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  • Part Number: 9905-873
  • SKU: 9905873WO
  • Manufacturer: Woodward
  • Series: ProTech 203 Overspeed Protection

9905-873

    Varying star amount pictures Varying star amount pictures Varying star amount pictures Varying star amount pictures Varying star amount pictures
  • 5.00 (2)
  • Click a star to rate this product
    Varying star amount pictures Varying star amount pictures Varying star amount pictures Varying star amount pictures Varying star amount pictures
  • 5.00 (2)
  • Click a star to rate this product
Model 9905-873 three units are connected in a two-out-of-three voting configuration so that if any single unit fails, the ProTech system will still provide the correct output.

AVAILABILITY:

CALL FOR AVAILABILITY

3 Year Warranty: Learn More
Sell Surplus: Have a 9905-873 to sell? Sell Now
Exchange Credit: Learn more about our exchange credit program
  • Part Number: 9905-873
  • SKU: 9905873WO
  • Manufacturer: Woodward
  • Series: ProTech 203 Overspeed Protection

9905-873 Technical Specifications

Dimensions W482.6mm x H310.4mm x D142.7mm (W19in x H12.244in x D5.62in)
Features CPU Failure Indication
Input Voltage (2) 24 Vdc, (1) 220 Vac
Keypad/Display (3) Keypad, Knob, and LCD
Manual Woodward 85191
Manufacturer Woodward Governor
Model De-energize-to-Trip
Operating Temperature –25 to +60 °C (–13 to +140 °F)
Standards NEMA 4, IP54
Weight Less than 17 lbs

Product Description

Overspeed protection device model 9905-873 is a de-energize-to-trip model. Like other models in the ProTech 203 Overspeed Protection System series, prime mover speed is monitored and calculated by three separate speed-sensing units. These units are all contained in the same key-locked enclosure, which meets NEMA 4 and IP 65 standards.

 

There are several benefits to using an overspeed protection system with this modular design. The two-out-of-three voting configuration of the three units ensures accurate output even if one of the three units is offline. Because of this, any individual speed sensing unit in the 9905-873 system can be tested or even replaced without having to take the prime mover offline.

 

The three speed-sensing units in the 9905-873 overspeed protection system are nearly identical. They all are interfaced with their own magnetic pickup (MPU), perform their own speed calculations, have their own operator interface, and have their own power supply. The only difference between the units is that in the 9905-873 model Unit A and Unit B each have a 24 Vdc power supply, while the power supply for Unit C is 220 Vac.

 

You can find more information on the specifications of model 9905-873 in Woodward ProTech 203 Overspeed Protection System Manual 85191 (version B). This manual should be consulted before installing this system, as it also contains information on location considerations.

Reviews For 9905-873
Internal Review

All shielded cables for 9905-873 must be twisted conductor pairs with either a foil or a braided shield. All signal lines should be shielded to prevent picking up stray signals from adjacent equipment. - AX Tech

Repair Services For 9905-873

Type Lead Time Price Action
Repair Service 1-2 weeks $4382

Our highly skilled technicians can repair your 9905-873. 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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9905-873 Manuals, White Papers, Data Sheets, and Troubleshooting