Bently Nevada 140072-04C 45 Position Monitor Module

The Bently Nevada 3500/45 Position Monitor Module, 140072-04C, is a four-channel position monitor for the 3500 Machinery Protection System. It accepts inputs from multiple transducer types—proximity transducers (Proximitor inputs), Rotary Position Transducers (RPTs), DC and AC LVDTs, and rotary potentiometers—allowing you to monitor axial thrust, valve position, and differential expansion, including case expansion, with programmable alarm setpoints. Each channel conditions its sensor signal and reports status to the rack’s configuration software, and the module supports configuration through the 3500 Rack Configuration Software. Electrical requirements vary by input type: Proximitor/RPT inputs require -24 Vdc; DC LVDTs require +15 Vdc; AC LVDTs operate at 2.3 Vrms, ~3400 Hz; rotary potentiometers require -12.38 Vdc. Input impedance ranges from 10 kΩ for Proximitor/RPT inputs to 1 MΩ for DC LVDTs, and typical power consumption is 7.7 W for Position I/O, 8.5 W for AC LVDT I/O, and 5.6 W for Rotary Potentiometer I/O. The module is designed for use inside a standard 3500 System rack and provides LED status indicators to aid health monitoring, making it a precise, flexible option for machinery protection and high-precision position monitoring in industrial assets.