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Intrinsically Safe Pre-Amplifiers

Motion Sensors (MSI) PMX (variable reluctance) and PRX (RF) intrinsically safe preamplifiers offer features similar to our PA1001A preamplifiers / signal conditioners and can be used in hazardous environments with intrinsically safe Variable Reluctance VR or RF sensors (e.g., PC45-X or RF10-X, respectively).

These sensors are certified intrinsically safe to:
  • CSA (with NRTL/C) for:
    - Ex ia IIC: Class I, Zone 0: Class I, Groups A, B, C, D; Class II, Groups E, F, G; Class III
    - Ex ia IIA: Class I, Zone 0: Class I, Group D; Class II, Groups E, F, G; Class III
  • ATEX (2014/34/EU) for Ex II 1 G; Ex ia IIC T4; Ex ia IIC T2; Ex ia IIA T4; Ex ia IIA T2
  • IECEx for Ex ia IIC T4; Ex ia IIC T2; Ex ia IIA T4; Ex ia IIA T2

  • Product Specifications

    Unlike our PA1001A preamplifiers, pulse outputs are factory installed and must be indicated when ordering. These preamplifiers are certified to CSA (with NRTL/C) and LCIE to ATEX (2014/34/EU) and IECEx. They are available for the hazardous locations listed above.

    CSA Electronics Certification
    ATEX Electronics Certification
    IECEx Certificate of Conformity
    EC Declaration of Conformity and Installation Instructions


    Input Power

    • 13 to 30 VDC, 35 mA @24 VDC (Class I, Zone 0, IIC models)
    • 7.5 to 30 VDC, 10 mA @ < 10 VDC (Class I, Zone 0, IIA models)
    • Reverse polarity protected

    RF Sensor Input

    • Modulation carrier frequency: 20 KHz
    • Input frequency: 2 Hz to 5 KHz, adjustable trigger level
    • Carrier adjustment: to allow precise tuning of carrier signal to physical environment (e.g., air gap, wall thickness)
    • Max. air gap: 0.160" (dependent on target geometry and construction)
    • Preferred coil inductance: 1.0 mH +/- 10%
    • Max. distance from sensor to preamp: 100'

    VR Sensor Input

    • Input protected, RF and band pass filtered
    • Input frequency: 10 Hz to 10 KHz, adjustable trigger level
    • Trigger sensitivity: 10 mV RMS min. (note: at 10 mV frequency range 10 Hz to 3 KHz)
    • Input impedance: 40K ohms (nominal)
    • Max. input signal: 60 volts RMS
    • Max. distance from sensor to preamp: 100'

    Pulse Output Options

    • All output options must be factory installed
    • Open Collector
    • TTL/CMOS (standard) fanout of 5 TTL/CMOS loads

    Interconnection Options

    • Three (3) pin MIL-C-5015 type connector with gold plated pins; mates with MS3106-10SL-3S; other connector types upon request.
    • Pigtail with wires or cables.
    • NPT threaded body with wire or cable pigtail for explosion proof environments.

    Ambient Temperature

    • CSA Certified Group IIC:
      • Temperature Code T2: -40°C to 125°C
      • Temperature Code T4: -40°C to 51°C
    • CSA Certified Group IIA:
      • Temperature Code T2: -40°C to 100°C
      • Temperature Code T4: -40°C to 51°C
    • ATEX and IECEx Certified Group IIC and IIA:
      • Temperature Code T2: -40°C to 125°C
      • Temperature Code T4: -40°C to 51°C

    Enclosures

    • Unit is intended for mounting in a conduit box. Enclosure is not required (unless using in Class II and III locations in which must be enclosed in an approved Class II/III enclosure) but recommended to protect unit from moisture, dirt, etc.
    • Optional explosion proof box available upon request

    Entity Parameters

    • Group IIC
      To Barrier:
      Vmax/Ui = 30 VDC, Imax/Ii = 200 mA
      Pi = 0.75 W; Ci/Ci = 0.0uF, Li/Li = 0.50 mH
      To Sensor:
      Voc/Uo = 5.9 VDC, Isc/Io = 64 mA
      Ca/Co = 1 uF, La/Li = 3.5 mH
    • Group IIA
      To Barrier:
      Vmax/Ui = 30 VDC, Imax/Ii = 190 mA Pi = 2.55 W; Ci/Ci = 0.0uF, Li/Li = 0.50 mH
      To Sensor:
      Voc/Uo = 10.5 VDC, Isc/Io = 190 mA
      Ca/Co = 4 uF, La/Li = 1.5 mH

    Approvals

    • Intrinsically safe to CSA (with NRTL/C) for:
      Ex ia IIC: Class I, Zone 0: Class I, Groups A, B, C, D; Class II, Groups E, F, G; Class III
      Ex ia IIA: Class I, Zone 0: Class I, Group D; Class II, Groups E, F, G; Class III
    • LCIE to ATEX (2014/34/EU) for Ex II 1 G; Ex ia IIC T4; Ex ia IIC T2; Ex ia IIA T4; Ex ia IIA T2
    • IECEx for Ex ia IIC T4; Ex ia IIC T2; Ex ia IIA T4; Ex ia IIA T2
    • CE compliant to EMC Directive 2004/108/EC for use in residential, commercial, light industrial and heavy industrial environments

    Warranty

    • Unconditional one (1) year warranty if used within specifications

    Physical Dimensions

    • Board diameter: 2.75"
    • Center mounting holes: 2" and 2.5"
    ATEX & IECEx Certified: Custom & Standard Speed Sensors for Intrinsically Safe applications (also approved by CSA w/NRTL/C)