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PC420A-EX Series Explosion-Proof Acceleration Loop Powered Sensor

Brand: Wilcoxon Sensing Technologies
Wilcoxon’s 4-20 mA vibration sensors incorporate an accelerometer, data acquisition circuitry, and vibration transmitter in a rugged industrial housing. The explosion-proof sensor provides a 4-20 mA output signal proportional to the overall acceleration level. The 4-20 mA output is commonly accepted by process control systems including PLC, DCS or SCADA for Effective continuous vibration monitoring. Simplified condition based maintenance can be performed on machinery without the investment and learning curve associated with traditional vibration monitoring systems. 

The acceleration-output sensor gives a signal with increased sensitivity to higher frequencies which can help indicate bearing wear and gear mesh conditions. 4-20 mA sensors are specified by their full scale values, where a “-10” sensor is designed with a full scale range of 10 g’s equivalent to 20 mA. By trending overall acceleration, changes can be monitored and when a predetermined increase is reached, an informed decision to shut down machinery can be made.
Features
  • RMS, peak equivalent or true peak detection
  • Explosion proof certified
  • Corrosion resistant
  • Provides continuous trending of overall machine vibration
  • Hermetically sealed
  • Reverse wiring protection
  • Manufactured in an approved ISO 9001 facility
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Wilcoxon’s 4-20 mA vibration sensors incorporate an accelerometer, data acquisition circuitry, and vibration transmitter in a rugged industrial housing. The explosion-proof sensor provides a 4-20 mA output signal proportional to the overall acceleration level. The 4-20 mA output is commonly accepted by process control systems including PLC, DCS or SCADA for Effective continuous vibration monitoring. Simplified condition based maintenance can be performed on machinery without the investment and learning curve associated with traditional vibration monitoring systems. 

The acceleration-output sensor gives a signal with increased sensitivity to higher frequencies which can help indicate bearing wear and gear mesh conditions. 4-20 mA sensors are specified by their full scale values, where a “-10” sensor is designed with a full scale range of 10 g’s equivalent to 20 mA. By trending overall acceleration, changes can be monitored and when a predetermined increase is reached, an informed decision to shut down machinery can be made.
Features
  • RMS, peak equivalent or true peak detection
  • Explosion proof certified
  • Corrosion resistant
  • Provides continuous trending of overall machine vibration
  • Hermetically sealed
  • Reverse wiring protection
  • Manufactured in an approved ISO 9001 facility

Specifications

Approvals & Certifications

  • ISO 9001

Approvals & Certifications

  • ATEX Ex II 2 G Ex D IIC T3 II 3 G Ex NA IIC T3 -40° C ≤ Ta ≤ 85° C
  • CE
  • CSA Class I, Division 1, 2 Grade A, B, C, D Class II, Division 1, 2 Groups E, F, G Class III T3C Ta = 85° C (185° F), Maximum

Circuit Protection

  • Reverse Wiring Protection

Electrical - Free Leads

  • Output Leads, 18 AWG: 13 feet (396.24 cm)

Element

  • Sensing Element Design: PZT, Shear

Enclosure, Body Material

  • 303 Stainless Steel

Environmental Protection

  • Corrosion Resistant
  • Explosion-proof

Frequency

  • Frequency Response (± 10%): 10 Hz to 1 kHz
  • Frequency Response (± 3 dB): 4 Hz to 2 kHz

Loop Resistance

  • 100 to 1,000 ohms, Maximum
  • 700 ohms at 24 Vdc, Maximum

Mounting

  • 3/8-24 x 3/8 Depth Tapped Hole

NPT Connection

  • 1" NPT Male

Power

  • Minimum RL Wattage Capability: 0.125 to 0.5 W

Power Requirement

  • 2-Wire Loop Power (Voltage at Sensor Terminals): 14-30 Vdc

Repeatability

  • ± 2%

Seal Type

  • Hermetic

Seat / Seal Material

  • Sealing: Epoxy Sealed

Sensitivity

  • Transverse Sensitivity, Maximum 5%

Shock

  • Shock Limit: 2,500 G Peak

Temperature Range

  • -40° to 85° C (-40° to 185° F)

Turn-On Time

  • 4-20 mA Loop: < 10 seconds

Vibration

  • Vibration Limit: 250 G Peak