The **PCC420AP-05-R6** is a high-performance, loop-powered (4-20 mA output) vibration sensor, specifically an accelerometer designed for permanent industrial monitoring. It is manufactured by **Wilcoxon Sensing Technologies**. --- ### 1. Key Technical Specifications The following table summarizes the primary electronic and physical characteristics of the device: | Parameter | Specification | | :--- | :--- | | **Output Type** | 4-20 mA (Proportional to Acceleration) | | **Measurement Range** | 0 - 5 g (Peak) | | **Frequency Response** | 2 Hz to 2,000 Hz (±10%) | | **Power Requirement** | 12 - 30 VDC (Loop powered) | | **Connection Type** | 2-pin MIL-C-5015 style connector | | **Housing Material** | 316L Stainless Steel | | **Operating Temp** | -40°C to +85°C | --- ### 2. Electronic Components and Design The device functions by converting mechanical vibration into a standardized analog current loop signal. Its internal circuitry consists of three main stages: #### A. Piezoelectric Sensing Element The "heart" of the sensor is a **Piezoceramic crystal**. When subjected to vibration, the crystal experiences mechanical stress and generates a small proportional electric charge. #### B. Integrated Charge Amplifier (IEPE Style) Since the charge from the crystal is extremely high-impedance and low-level, the internal electronics include a charge amplifier. This converts the high-impedance charge into a stable voltage signal while maintaining low noise levels. #### C. 4-20 mA Transmitter Circuitry Unlike standard accelerometers that output raw AC voltage, the PCC420AP series integrates a **True RMS or Peak processing circuit** and a current regulator: * **Rectification/Processing:** The AC vibration signal is converted to a DC level representing the **Peak** acceleration (as denoted by the "P" in the part number). * **Current Regulation:** The circuit modulates the current draw on the 2-wire loop between 4 mA (zero vibration) and 20 mA (full scale of 5g). --- ### 3. Part Number Breakdown: `PCC420AP-05-R6` | Segment | Meaning | | :--- | :--- | | **PCC** | Wilcoxon series designation for 4-20 mA sensors. | | **420** | Standard 4-20 mA output protocol. | | **A** | Measurement type: **Acceleration**. | | **P** | Detection type: **Peak** value (calculates the highest point of the waveform). | | **05** | Full-scale range: **5 g**. | | **R6** | Termination type: **Right-angle** 2-pin MIL-C-5015 connector. | --- ### 4. Typical Wiring Diagram The device is a 2-wire loop-powered sensor, meaning the signal and power share the same two wires. ```mermaid graph LR A[Power Supply +] --> B(Sensor Pin A) B --> C(Sensor Pin B) C --> D[PLC/DCS Analog Input] D --> E[Power Supply - / Common] ```