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The Bently Nevada 3500/42M 135489-01 is a high-precision vibration monitoring module engineered for the 3500 machinery protection system. It features four independent channels for simultaneous vibration monitoring using accelerometers or velocity sensors, with advanced signal processing to capture critical data such as amplitude, frequency, and phase. The module excels in anti-interference performance, utilizing shielded circuitry and filtering algorithms to minimize noise from electromagnetic sources and ensure data integrity. Configurable alarm and trip setpoints enable early fault detection for conditions like unbalance, misalignment, and bearing defects. Designed for harsh industrial environments, it operates reliably in temperatures from -30°C to +65°C and complies with international standards for machinery safety. The module supports seamless integration with control systems via 4-20 mA outputs and digital communications (e.g., Modbus, Ethernet). Applications include power generation turbines, compressors, pumps, and fans where precise vibration monitoring is essential for preventing equipment failure and optimizing maintenance schedules. The 135489-01 variant incorporates enhanced calibration and firmware for superior accuracy and compatibility with the 3500 framework, reflecting Bently Nevada's commitment to innovation in machinery protection.