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PC420A Dual Output Series Acceleration Loop-Powered Sensor

Brand: Wilcoxon Sensing Technologies
Wilcoxon’s 4-20 mA vibration sensors integrate easily with an existing PLC, DCS or SCADA system. The PC420A series dual output sensors provide 24/7 monitoring of overall machine vibration for continuous trending, alerting users to changing machine conditions and helping to guide maintenance in prioritizing the need for service. The choice of true RMS, true peak or peak output allows you to choose the sensor that best fits your industrial requirements. True peak is useful for detecting loose parts such as valves on reciprocating machinery. 

The 4-20 mA output of the PC420A series is proportional to acceleration vibration. An output of 4 mA indicates a level of 0 g or no vibration present. A full-scale reading of 20 mA indicates that the maximum range (RMS or peak) of vibration is present. The dynamic output signal is derived from an internal buffered amplifier. The dynamic output requires the 4-20 mA loop be powered. No constant-current supply diode is necessary, the BOV at the dynamic output is developed by the internal amplifier.
Features
  • Peak equivalent, true RMS or true peak output
  • Corrosion resistant
  • Hermetically sealed
  • ESD protection
  • Overload protection
  • Reverse wiring protection
  • Dynamic signal output
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Wilcoxon’s 4-20 mA vibration sensors integrate easily with an existing PLC, DCS or SCADA system. The PC420A series dual output sensors provide 24/7 monitoring of overall machine vibration for continuous trending, alerting users to changing machine conditions and helping to guide maintenance in prioritizing the need for service. The choice of true RMS, true peak or peak output allows you to choose the sensor that best fits your industrial requirements. True peak is useful for detecting loose parts such as valves on reciprocating machinery. 

The 4-20 mA output of the PC420A series is proportional to acceleration vibration. An output of 4 mA indicates a level of 0 g or no vibration present. A full-scale reading of 20 mA indicates that the maximum range (RMS or peak) of vibration is present. The dynamic output signal is derived from an internal buffered amplifier. The dynamic output requires the 4-20 mA loop be powered. No constant-current supply diode is necessary, the BOV at the dynamic output is developed by the internal amplifier.
Features
  • Peak equivalent, true RMS or true peak output
  • Corrosion resistant
  • Hermetically sealed
  • ESD protection
  • Overload protection
  • Reverse wiring protection
  • Dynamic signal output
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Specifications

Brand

Approvals & Certifications

  • CE

Circuit Protection

  • Overload Protection
  • Reverse Wiring Protection

Electrical Connectors

  • Cable (J9T3A)
  • Mating Connector: R6 G Typical
  • Output Connector: 3-Pin, MIL-C-5015 Style

Element

  • Sensing Element Design: PZT Ceramic, Shear

Enclosure, Body Material

  • 316L Stainless Steel

Environmental Protection

  • Corrosion Resistant

Frequency

  • Frequency Response (± 10 %): 10 Hz to 1 kHz
  • Frequency Response (± 3 dB %): 4 Hz to 2 kHz
  • Resonant Frequency, Mounted, Nominal: 25 kHz

Loop Resistance

  • Maximum 700 Ω

Mounting

  • 1/4-28 Tapped Hole

Noise

  • Dynamic Output Noise, Equivalent G, 2.5 Hz to 10 kHz: 0.002 Ips (PC420Ax-yy-DA)
  • Dynamic Output Noise, Equivalent G, 2.5 Hz to 10 kHz: 2 mg (PC420Ax-yy-DV)

Non-Linearity

  • Amplitude Non-Linearity: Max. 1 %

Power

  • Minimum Wattage Capability: 0.125 to 0.5 W at 12-30 Vdc

Power Requirement

  • 2-Wire Loop Power (Voltage at Sensor Terminals): 10-30 Vdc

Repeatability

  • ± 2 %

Seal Type

  • Hermetic

Sensitivity

  • Sensitivity, ± 10 %: 100 mV/g (PC420Ax-yy-DA)
  • Sensitivity, ± 10 %: 100 mV/inch/sec (PC420Ax-yy-DV)
  • Transverse Sensitivity: Max.

Shock

  • Shock Limit: 2,500 G Peak

Temperature Range

  • -40° to 85° C (-40° to 185° F)

Turn-On Time

  • 4-20 mA Loop: < 30 seconds

Vibration

  • Vibration Limit: 250 G Peak
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