Emerson A 6312 Speed and Key Monitor

The Speed and Key Monitor is designed for high reliability for the plant’s most criticalrotating machinery monitoring speed, phase, zero speed and direction of rotation.This 1-slot monitor is used together with the AMS 6500 monitors to build a completeAPI 670 machinery protection monitor. Applications include steam, gas, compressorsand hydro turbo machinery.

The Speed and Key Monitor can be configured for redundant mode where automaticswitchover from primary to backup tach is possible. Sensor gap voltage and pulsecounting/comparison are monitored to trigger switchover. When the Speed andKey Monitor is operating in redundant mode, the main and failover key or speeddisplacement sensor must be installed in the same axial plane to ensure phasecontinuity upon failover.

The AMS 6500 is an integral part of PlantWeb® and AMS software. PlantWeb providesoperations integrated machinery health combined with the Ovation® and DeltaV™process control system. AMS software provides maintenance personnel advancedpredictive and performance diagnostic tools to confidently and accurately determinemachine malfunctions early.

„ Two-channel 3U size plug-in modulesdecrease cabinet space requirementsin half from traditional four-channel6U size cards
„ API 670 compliant,hot swappable module
„ Remote selectable limitmultiply and trip bypass
„ Rear buffered proportionaloutputs, 0/4-20 mA output
„ Self-checking facilities includemonitoring hardware, power input,hardware temperature, sensorand cable
„ Use with displacement sensor 6422,6423, 6424 and 6425 and driverCON 011/91, 021/91, 041/91
„ 6TE wide module used inAMS 6000 19” rack mount chassis
„ 8TE wide module used withAMS 6500 19” rack mount chassis