About the 8200-206
The 8200-206 unit was released by Woodward Inc to operate in the ProTech 203 Overspeed Protection series. The ProTech 203 system works by sensing prime mover speed through three individual magnetic pickups (MPUs); each of the MPUs is tied to separate speed-sensing units within the system. Model 8200-206 is a 24 Vdc input, energize-to-trip model.
The three speed-sensing units in the 8200-206 system are enclosed in a single, locked enclosure. Key access is required to switch between MONITOR and PROGRAM modes. Aside from that, the units function independently from one another, continually monitoring for overspeed and or loss of input conditions. They are configured for a two-out-three voting method.
Testing, repair, or replacement of any single speed-sensing unit within the 8200-206 overspeed protection system requires little to no downtime in operation. The configuration of the units allows for two units to maintain complete control of the system in the event the third is offline.
The functional status of the 8200-206 system is shown by individual LED indicators on the front panel. Some of the separate LEDs indicate:
- Failure of an MPU or its wiring
- Errors in the unit’s CPU operation
- Tripped speed-sensing (there is also a separate alarm output for this condition)
The 8200-206 system is only suitable for non-hazardous locations. It should be installed where it will be protected from sunlight, water, and vibration and will remain in an operating temperature range of –25 to +60 °C (–13 to +140 °F). For location requirements and installation instructions, refer to the ProTech 203 Overspeed Protection System Manual 85206 (Revision F).