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  • -30°C to +65°C (-22°F to +149°F) operating temperature
  • -45°C to +85°C (-49°F to +185°F) storage temperature
  • Relative humidity 0% to 95% Non-condensing
  • Vibration per IEC 61010-1, 3 g @ 3-57 Hz, 5 g @ 57-500 Hz
  • Shock per IEC 61010-1, 15 g for 11 mS


The Bently Nevada 3701/55 ADAPT Condition Monitor (ADAPT ESD) is a safety PLC with a graphical logic programming interface and integrated overspeed detection. ADAPT ESD is designed for emergency shutdown of rotating machinery such as steam, gas, and hydro turbines, expanders, and other process equipment.

ADAPT ESD is a compact, standalone, triple-redundant, safety shutdown device that is designed to meet a broad range of user scenarios and applications. The design offers an electrical and mechanical package with attention to reliability and availability as well as extensive self-diagnostics and compliance to industry standards. It is designed to meet a broad range of use cases and environments. The design incorporates significant measures to provide a robust electrical and mechanical package with careful attention to system reliability, including extensive shock, vibration, and temperature exposure.

The ADAPT ESD system should be treated with the appropriate care, as exposure to extreme environments will shorten the life expectancy of the system. Exposing the ADAPT ESD to condensing liquids, rain, sand, or situations that impair ventilation can cause excessive internal heating and performance loss.