The 'On-Line' vibration monitor model A3900 II for DIN rail mounting is used in systems for permanent vibration monitoring. The integrated sensor power supply ICP® a trouble-free operation with high-quality sensors with integrated ICP® electrons provides electronic. The model A3900-II can be used speed measurement of vibration acceleration and Schwingge -. The appropriate level are displayed digitally on the spot and can be transferred via the integrated RS-232 interface to a computer. An adjustable power loop output (4... 20 mA, electrically isolated) guarantees compatibility with existing management and monitoring systems. Programmable alarm values and an integrated relay (250V/2A) allow independent monitoring operation.