The **PA-930-302R-R2** is a high-precision, industrial-grade pressure transducer (pressure sensor) manufactured by **Nidec Components** (formerly Copal Electronics). It belongs to the PA-930 series, known for its integrated amplifier and high-temperature durability. --- ### 1. Technical Specifications Below are the primary electronic and physical specifications for this specific model: | Feature | Specification | | :--- | :--- | | **Pressure Type** | Compound (Measures both Gauge and Vacuum) | | **Rated Pressure Range** | -100 to 300 kPa | | **Output Type** | Analog Voltage (1 to 5 V) | | **Supply Voltage** | 10.8 to 26.4 VDC | | **Current Consumption** | ≤ 15 mA | | **Accuracy** | ±0.5% F.S. (Full Scale) | | **Operating Temp** | -20°C to 150°C (High temp capable) | | **Pressure Port** | R 1/4 (Tapered pipe thread) | --- ### 2. Key Electronic Components & Design The PA-930-302R-R2 consists of three major electronic functional blocks: #### A. The Sensing Element (MEMS) * **Diffused Type Silicon Diaphragm:** The core is a semiconductor strain gauge. When pressure is applied, the silicon diaphragm deforms, changing its electrical resistance (Piezoresistive effect). * **Oil-filled Structure:** The silicon chip is immersed in silicone oil and protected by a stainless steel (SUS316L) diaphragm, allowing it to measure gases and liquids including corrosive media. #### B. Signal Conditioning Circuit * **Integrated Amplifier:** Unlike basic sensors that output millivolts (mV), the "R2" suffix indicates an integrated circuit that amplifies the signal to a robust **1-5V analog output**. * **Temperature Compensation:** It includes a thermistor-based compensation circuit to ensure the voltage output remains stable even if the ambient temperature fluctuates between -20°C and 150°C. #### C. Electrical Protection * **Reverse Polarity Protection:** Prevents damage if the V+ and Ground wires are accidentally swapped. * **EMI/RFI Filtering:** Internal capacitors/beads to minimize noise interference in industrial environments. --- ### 3. Wiring Configuration The device typically utilizes a 3-wire system. The wire colors generally follow this standard: | Wire Color | Function | Description | | :--- | :--- | :--- | | **Red** | Power (+) | 12V or 24V DC Input | | **White** | Output | 1 to 5V Analog Signal | | **Black** | Common (GND) | Shared Ground for Power and Signal | --- ### 4. Application Context The **"302R"** in the part number specifically denotes a **Compound Pressure** range. This means the sensor is designed for systems that fluctuate between vacuum and positive pressure, such as: * Leak testing equipment. * Semiconductor manufacturing gas lines. * Industrial hydraulic monitoring.