The Bently Nevada  Electronic Overspeed Detection System for the 3500 Series Machinery Detection System provides a highly reliable, fast response, redundant tachometer system intended specifically for use as part of an overspeed protection system. 

It is designed to meet the requirements of American Petroleum Institute (API) Standards 670 and 612 pertaining to overspeed protection. 3500/53M modules can be combined to form a 2-out-of-2 or a 2-out-of-3

(recommended) voting system. The Overspeed Detection System requires the use of a 3500 rack with redundant power supplies.

3500/53M modules can be combined to form a 2-out-of-2 or a 2-out-of-3 (recommended) voting system. The Overspeed Detection System requires the use of a 3500 rack with redundant power supplies.

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