9905-870

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Woodward ProTech 203 electronic two-out-of-three Overspeed Protection Model 9905-870 with a 24Vdc Input, Lockable Enclosure, and a Trip Alarm and LED.

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  • Part Number: 9905-870
  • SKU: 9905870WO
  • Manufacturer: Woodward
  • Series: ProTech 203 Overspeed Protection

9905-870

    Varying star amount pictures Varying star amount pictures Varying star amount pictures Varying star amount pictures Varying star amount pictures
  • 4.50 (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
  • 4.50 (2)
  • Click a star to rate this product
Woodward ProTech 203 electronic two-out-of-three Overspeed Protection Model 9905-870 with a 24Vdc Input, Lockable Enclosure, and a Trip Alarm and LED.

AVAILABILITY:

CALL FOR AVAILABILITY

3 Year Warranty: Learn More
Sell Surplus: Have a 9905-870 to sell? Sell Now
Exchange Credit: Learn more about our exchange credit program
  • Part Number: 9905-870
  • SKU: 9905870WO
  • Manufacturer: Woodward
  • Series: ProTech 203 Overspeed Protection

9905-870 Technical Specifications

Dimensions W19in x H12.244in x D5.62in
Features Built-In Self-Test
Input Voltage 120 Vac/dc = 88–132 Vac/90–150Vdc, 7.25W
Keypad/Display 3 Keypads and Displays
Manual Woodward 85191
Model De-energize-to-Trip
Operating Temperature –25 to +60 °C (–13 to +140 °F)
Weight 7Kg

Product Description

There are three separate speed-sensing units in the 9905-870 overspeed protection device, all kept within the same, key-locked IP65-certified enclosure. These three identical units are configured in a way that the individual magnetic pickup (MPU) interfaced with each and the separate speed calculations performed by each unit, work together in a two-out-of-three hardware vote to determine whether an overspeed condition has occurred.

 

 In the event of an overspeed condition, a trip relay is activated. After a unit is tripped, it requires either a reset or a power cycle to return to normal operations. Aside from the detection of an overspeed condition, things such as a loss of MPU signal, an interlock fault, or lack of a reset before the turbine is re-started could all cause a trip. Woodward ProTech 203 Overspeed Protection System Manual 85191 (B) has complete information on troubleshooting trip relays.

 

The three speed-sensing units in the 9905-870 model are identical. Each unit comes with its own 120 Vac/dc power supply, and they each have a separate operator interface with an LCD, touchpad, and functional status LEDs. On the LCD, operators can view the actual speed of the individual unit, and the LEDs offer a quick first-step identification of problems within a unit, such as a failed MPU or an improperly functioning CPU. Both an LED and an alarm output are used to alert operators of a tripped unit.

Reviews For 9905-870
Internal Review

Depending on how the 9905-870 is configured, this input can act as a remote start input, or as an indication to the ProTech system that it should be sensing a speed greater than the MPU fail set point. - AX Control Tech

Repair Services For 9905-870

Type Lead Time Price Action
Repair Service 1-2 weeks $5215

Our highly skilled technicians can repair your 9905-870. 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

9905-870 Manuals, White Papers, Data Sheets, and Troubleshooting