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A6110 Shaft Relative Vibration Monitor for AMS 6500 Machinery Health Monitor The Shaft Relative Vibration Monitor is designed for extremely high reliability for the plant’s most critical rotating machinery. This 1-slot monitor is used together with other AMS 6500 monitors to build a complete API 670 machinery protection monitor. Applications include steam, gas, compressors and hydro turbo machinery. The main functionality of the Shaft Relative Vibration monitoring module is to accurately monitor shaft relative vibration and reliably protect machinery by comparing vibration parameters against alarm setpoints, driving alarms and relays. Shaft relative vibration monitoring consists of a displacement sensor either mounted through the bearing case, or mounted internally on the bearing housing, with the rotating shaft being the target. The displacement sensor is a non-contact sensor measuring shaft position and movement. Since the displacement sensor is mounted to the bearing, the monitored parameter is said to be shaft relative vibration, that is, shaft vibration relative to the bearing case. Shaft relative vibration is an important measurement on all sleeve bearing machines for predictive and protection monitoring. Shaft relative vibration should be selected when the machine case is massive as compared with the rotor, and the bearing case is not expected to vibrate between zero and production-state machine speeds. Shaft absolute is sometimes selected when the bearing case and rotor mass are more closely equal, where it is more likely that the bearing case will vibrate and impact shaft relative readings. The AMS 6500 is an integral part of PlantWeb® and AMS software. PlantWeb provides operationsintegrated machinery health combined with the Ovation® and DeltaV™ process control system. AMS software provides maintenance personnel advanced predictive and performance diagnostic tools to confidently and accurately determine machine malfunctions early. Transducer Inputs Number of inputs Two, independent or combined monitoring modes Type of inputs Eddy current, differential Emerson sensor inputs Part number: 6422, 6423, 6424, 6425 Isolation Galvanically separated from power supply Input resistance >100 kΩ Input voltage range 0 to -22 VDC Input frequency range „ Lower cutoff 1 or 5 Hz „ Upper cutoff 50-2000 Hz adjustable A6110 „ Two-channel, 3U size, 1-slot plugin module decreases cabinet space requirements in half from traditional four-channel 6U size cards „ API 670 compliant, hot-swappable module „ Remote selectable limit multiply and trip bypass „ Front and rear buffered and proportional outputs, 0/4-20 mA output, 0-10 V output „ Self-checking facilities include monitoring hardware, power input, hardware temperature, sensor, and cable „ Use with displacement sensors PR6422, PR6423, PR6424, PR6425, and driver CON 011/91, 021/91,041/91