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    649A01 Reciprocating Machinery Protector (RMP)

    March 20, 2013
    Related To: PCB Piezotronics, Inc.
    66675c19c403780008477805 830 350

    Model 649A01 Reciprocating Machinery Protector (RMP) uses the next generation of impact monitoring technology. This two-wire, loop-powered, 4-20 mA transmitter detects impacts from mechanical shock events, which typically occur in or near a machine’s cylinder assembly. This technology is particularly effective on reciprocating machinery where these high-frequency impacts are often overlooked or when trending overall vibration levels.

     

    The hermetically sealed design can be easily interfaced with existing alarm, control, and monitoring systems such as PLCs, DCS, and SCADA systems. The field programmable features of the RMP allow users to customize each installation point and tailor the output to suit their application. This includes variable setpoints and alarm levels for optimum performance. The RMP detects common reciprocating compressor faults such as loose or broken bolts, cracked connecting rods, and scoring in the cylinder.

    • Output: 4-20 mA
    • Machinery RPM Range: 240 to 10,000 cpm (4 to 166 Hz)
    • Temperature Range: -40 to 212°F (-40 to 100°C)
    • Excitation Voltage: 15 to 30V DC
    PERFORMANCEOutput4-20 mAMachinery RPM Range240 to 10,000 CPM (4 to 166 Hz)Time Window0.1 to 4.0 secWeighting Factor0.2 to 16 mATrending Range Current4 to 20 mAThreshold Level2 to 50 gENVIRONMENTALTemperature Range-40 to 212°F (-40 to 100°C)Storage Temperature Range-40 to 257°F (-40 to 125°C)ELECTRICALExcitation Voltage15 to 30V DCLoad Resistance50(Vs-15) OhmElectrical Isolation>10^8 OhmPHYSICALSize - Hex1.25 in. (32 mm)Size - Height2.60 in. (66 mm)Weight7 oz. (198 g)Mounting Thread1/4-28 UNFMounting Torque3 to 5 ft-lb (4 to 7 Nm)Sensing ElementPiezoelectric AccelerometerHousing MaterialStainless SteelSealingWelded HermeticElectrical Connection PositionTopElectrical Connections (Pin A)4-20 mA Pos (+)Electrical Connections (Pin B)4-20 mA Neg (-)Overload Limit (Shock)5,000 g pk (4,9050 m/s² pk)