9905-878

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ProTech 203 Model 9905-878 displays the actual speed from each speed probe and the highest speed signal. Features Hot Replacement modules

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  • Part Number: 9905-878
  • SKU: 9905878WO
  • Manufacturer: Woodward
  • Series: ProTech 203 Overspeed Protection

9905-878

    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
ProTech 203 Model 9905-878 displays the actual speed from each speed probe and the highest speed signal. Features Hot Replacement modules

AVAILABILITY:

CALL FOR AVAILABILITY

3 Year Warranty: Learn More
Sell Surplus: Have a 9905-878 to sell? Sell Now
Exchange Credit: Learn more about our exchange credit program
  • Part Number: 9905-878
  • SKU: 9905878WO
  • Manufacturer: Woodward
  • Series: ProTech 203 Overspeed Protection

9905-878 Technical Specifications

Dimensions W19in x H12.244in x D5.62in (with knobs and key)
Features Key Lock
Input Voltage 24 Vdc = 18–32 Vdc, 7.25 W
Keypad/Display 3 Displays and Keypads
Manufacturer Woodward (Manual 85191)
Model De-energize-to-Trip
Operating Temperature –13 to +140 °F
Standards NEMA 4x, IP54
Weight Less than 17 lbs

Product Description

Woodward’s ProTech 203 model 9905-878 is designed for reliable overspeed protection. This two-out-of-three hardware vote device permits normal operations with an accurate output provided two of the three speed-sensing units are online, which permits hot replacement, testing of individual units while the prime mover is online, and continuing operations in the event one of the units is tripped. An inadvertent turbine trip will not occur from a single MPU failure.

 

Each of the three speed-sensing units within model 9905-878 has a 24 Vdc power supply (18–32 Vdc, 7.25 W voltage range). Each one produces +5 V and +24 V, which is isolated from the input voltage. All three units are in the same enclosure. The locked enclosure of this ProTech 203 model is NEMA 4X certified as long as it uses the optional stainless steel hubs.

 

This is a de-energize-to-trip model. It has LED indicators on each unit to alert operators of a tripped unit, an MPU failure, or a CPU failure. There is also an alarm output to notify of a tripped unit.

 

A tripped unit must be reset (or the power cycled) before being brought back online, and each unit must be reset before starting the turbine. The 9905-878 overspeed protection system includes a convenient remote reset feature.

The installation and operation manual for models 9905-878 is Woodward’s ProTech 203 Overspeed Protection System Manual 85191 (version B). In this manual, you can find additional product specifications, installation location requirements, programming instructions, and more.

Reviews For 9905-878
Internal Review

Avoid the build-up of static electricity on your body when working with the 9905-878 by not wearing clothing made of synthetic materials. Wear cotton or cotton-blend materials as much as possible because these do not store static electric charges as much as synthetics. - AX Control Tech Team

Repair Services For 9905-878

Type Lead Time Price Action
Repair Service 1-2 weeks $4164

Our highly skilled technicians can repair your 9905-878. 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
Learn More

9905-878 Manuals, White Papers, Data Sheets, and Troubleshooting