The **PMS-Z-R/Q** typically refers to a high-precision digital pressure sensor or switch assembly, often used in pneumatic systems and industrial automation. Below is a breakdown of its electronic components, technical specifications, and internal logic. --- ### 1. Core Electronic Components The device integrates several key electronic subsystems to convert physical pressure into a readable digital signal: | Component | Function | | :--- | :--- | | **Piezo-resistive Element** | The primary sensing element that changes resistance when pressure is applied. | | **A/D Converter** | Converts the analog voltage from the sensor into a digital signal for the MCU. | | **Microcontroller (MCU)** | Processes the data, manages the display, and controls the switching logic. | | **NPN/PNP Transistor** | Acts as the electronic switch for the digital outputs (Control signals). | | **LED/LCD Driver** | Manages the 3-digit or 4-digit numeric display on the face of the unit. | --- ### 2. Technical Specifications Most variants of this series (like those produced by manufacturers such as Pisco or similar pneumatic brands) follow these electronic parameters: * **Supply Voltage:** 12 to 24V DC (±10% ripple). * **Current Consumption:** Low power, typically ≤ 40mA. * **Switching Output:** NPN or PNP open collector (Max 100mA). * **Response Time:** Adjustable, usually < 2.5ms to prevent "chattering." * **Analog Output:** Some versions include a 1–5V or 4–20mA secondary output for PLC integration. --- ### 3. Wiring and Connection Logic The "R/Q" designation often refers to the connector type or specific output polarity. Standard wiring usually follows this color code: 1. **Brown:** Positive Terminal (+V). 2. **Blue:** Negative Terminal (0V/GND). 3. **Black:** Switch Output 1. 4. **White:** Switch Output 2 (or Analog Output). --- ### 4. Key Features * **Hysteresis Mode:** Electronic adjustment of the difference between the set-point and the reset-point. * **Zero-Point Adjustment:** Electronic calibration to reset the sensor to "0" at atmospheric pressure. * **Peak/Bottom Hold:** Internal memory captures the highest and lowest pressure spikes recorded. ---