The **PS83-352A-R2** is a high-precision digital pressure switch/gauge manufactured by **Nidec Components** (formerly Copal Electronics). It is designed for industrial automation and pneumatic applications where accurate pressure monitoring and control are required. --- ### ## Technical Specifications Breakdown The part number indicates specific characteristics regarding pressure range, output type, and mechanical configuration. | Feature | Specification | | :--- | :--- | | **Pressure Type** | Gauge Pressure | | **Rated Pressure Range** | -0.1 to 3.5 MPa (MegaPascals) | | **Display Type** | 3.5 digit LED (Red) | | **Switch Output** | 2 Open Collector Outputs (NPN) | | **Analog Output** | 1 to 5 VDC (Linear) | | **Power Supply** | 12 to 24 VDC ± 10% | | **Pressure Port** | R2 (R 1/4 - Tapered Pipe Thread) | | **Protection Class** | IP65 (Dust-tight and water-resistant) | --- ### ### Key Electronic Components & Functions 1. **Pressure Transducer (Sensor Element):** The core is a **diffused type semiconductor pressure sensor**. It utilizes the piezoresistive effect, where the electrical resistance of a silicon diaphragm changes when mechanical pressure is applied. 2. **Signal Conditioning Circuitry:** Internal amplifiers convert the tiny millivolt signals from the sensor into a stable voltage. This circuitry includes temperature compensation to ensure accuracy across a wide range of operating temperatures (typically -10°C to 50°C). 3. **Comparator & Logic (Switching):** The device contains logic gates that compare the real-time pressure against two user-defined set points. * **Hysteresis Mode:** Prevents rapid "chattering" of the switch when pressure fluctuates near the limit. * **Window Comparator Mode:** Keeps the output active only within a specific pressure range. 4. **Output Interfaces:** * **NPN Open Collector:** Acts like a switch to ground. It can drive small relays, PLC inputs, or LEDs (Max 30V / 80mA). * **Analog Output (1-5V):** Provides a continuous voltage proportional to the pressure, used for remote monitoring or data logging. --- ### ### Wiring Diagram Overview | Wire Color | Function | Description | | :--- | :--- | :--- | | **Brown** | DC (+) | Positive power supply (12-24V) | | **Blue** | DC (-) | Ground / Common | | **Black** | Switch Output 1 | NPN Output for first set point | | **White** | Switch Output 2 | NPN Output for second set point | | **Gray** | Analog Output | 1 to 5 V signal | --- ### ### Typical Applications * **Leak Testing:** Detecting pressure drops in sealed systems. * **Pneumatic Actuators:** Controlling the stroke of air cylinders. * **Vacuum Systems:** Monitoring negative pressure in suction pick-and-place machines. * **Industrial Process Control:** Ensuring hydraulic or pneumatic lines remain within safe operating limits.