Introduction
The part number 330500-04-00 refers to a Proximitor® Seismic Converter. This device is a critical signal conditioner and power supply for seismic transducers (typically accelerometers or velocity sensors) used in machinery condition monitoring.
Unlike a proximity probe system that measures relative shaft displacement, this converter is designed for sensors that measure absolute casing vibration. It provides the necessary power (typically a constant current for IEPE sensors) to the connected seismic transducer, conditions the raw signal, and converts it into standardized and scalable analog outputs. This allows for easy integration of casing vibration data into control and monitoring systems.
Key Parameters
The following table outlines the typical specifications for a Proximitor Seismic Converter.
| Parameter Category | Specification |
|---|---|
| Part Number | 330500-04-00 |
| Type | Signal Conditioner / Power Supply for Seismic Transducers |
| Compatible Input | IEPE (ICP®) Accelerometers & Velocity Sensors |
| Input Power (to Sensor) | Constant Current: 2 to 20 mA (typically 4 mA) |
| Output Signal | • 4-20 mA (for vibration level) • ±5 V or ±10 V DC (for dynamic vibration signal) |
| Power Supply | 18 - 30 V DC |
| Frequency Response | 10 Hz to 10,000 Hz (depending on configuration) |
| Dynamic Range | Up to 400 mV/mA (for IEPE sensors) |
| Housing Material | Aluminum Alloy or Powder-Coated Steel |
| Mounting | DIN Rail (35 mm standard) or Panel Mount |
| Electrical Connection | Removable Screw Terminal Blocks |
| Operating Temperature | -30 °C to +70 °C (-22 °F to +158 °F) |
| Dimensions (H x W x D) | Approx. 120 mm x 22 mm x 110 mm (4.72 in x 0.87 in x 4.33 in) - Example DIN Rail Module |
| Weight | Approx. 0.25 kg (0.55 lbs) |
Application Scenarios
The Proximitor Seismic Converter is a versatile interface module used in various applications where casing vibration monitoring is required.
Casing Vibration Monitoring on Rotating Machinery:
Pumps, Fans, and Motors: Used to power and condition signals from accelerometers mounted on bearing housings. The 4-20 mA output provides a continuous overall vibration level to the PLC/DCS for alarm and shutdown functions, protecting the machine from bearing failures and other mechanical faults.
Integration of Vibration Data into Control Systems:
PLC/DCS/SCADA Interface: Serves as a crucial link between "raw" vibration sensors and the plant's control system. It converts the sensor's signal into a robust, industry-standard format (4-20 mA or ±10 V) that can be transmitted over long distances and easily interpreted by the control system.
Portable and Permanent Data Acquisition Systems:
Diagnostic Systems: Provides conditioned power and signal output for both portable data collectors (using the voltage output) and permanent online monitoring systems (using the 4-20 mA output), enabling both periodic and continuous vibration analysis.
General Purpose Vibration Measurement:
Structural Monitoring and Test Benches: Used in applications beyond pure machinery protection, such as monitoring the vibration of structures, platforms, or in research and development test stands where reliable signal conditioning from IEPE sensors is required.
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