The **PCC421AP-10-R6** is a high-performance **Process Control Vibration Sensor** (accelerometer) manufactured by Wilcoxon Sensing Technologies. Unlike standard vibration sensors that output raw AC signals, this device integrates internal electronics to convert vibration into a process-friendly 4-20 mA current loop signal. --- ### 1. Key Technical Specifications Below are the primary electrical and physical characteristics of the component: | Feature | Specification | | :--- | :--- | | **Output Type** | 4-20 mA DC (Proportional to Acceleration) | | **Measurement Range** | 0 to 10 g (Peak) | | **Frequency Response** | 10 Hz to 1,000 Hz (±10%) | | **Operating Voltage** | 12 VDC to 30 VDC | | **Connection Type** | 2-pin, MIL-C-5015 style connector | | **Housing Material** | 316L Stainless Steel | | **Operating Temperature** | -40°C to +85°C | --- ### 2. Internal Electronic Architecture The PCC421 series contains three main electronic stages that allow it to interface directly with a PLC or DCS: 1. **Piezoelectric Sensing Element:** The core is a PZT (Lead Zirconate Titanate) ceramic crystal. When subjected to mechanical vibration, it generates a high-impedance charge proportional to the acceleration. 2. **Charge Amplifier & Signal Conditioner:** Internal circuitry converts the high-impedance charge into a stable voltage. It includes a band-pass filter to ensure only the relevant frequencies (10 Hz – 1 kHz) are measured. 3. **True RMS or Peak Converter:** The "AP" in the part number signifies **Acceleration Peak**. The electronics rectify the signal to provide a DC output representing the peak acceleration level rather than the raw waveform. 4. **4-20 mA Current Driver:** This stage regulates the current drawn from the power supply. 4 mA represents 0 g, and 20 mA represents the full scale (10 g). This allows for long-distance signal transmission without voltage drop interference. --- ### 3. Part Number Breakdown Understanding the suffix codes helps identify the specific electronic calibration: * **PCC:** Process Control Ceramic (Sensor Series). * **421:** Standard 4-20 mA output sensor housing. * **AP:** Output represents **Acceleration** in **Peak** units. * **10:** The full-scale range is **10 g**. * **R6:** Indicates the specific connector orientation or mounting thread (typically a 1/4-28 tapped hole). --- ### 4. Wiring Diagram (Conceptual) The device functions as a "loop-powered" transmitter. ```mermaid graph LR A[Power Supply +24V] --> B[Sensor Pin A] B --> C[Internal Electronics] C --> D[Sensor Pin B] D --> E[PLC/DCS Analog Input] E --> F[Common Ground/Return] ``` ---