The **M2UDS-KG-R2/N** belongs to the **M2U series** of high-precision digital pressure sensors (specifically the M2UDS sub-series). These devices are commonly used in industrial automation for monitoring air and non-corrosive gas pressures. --- ### ## 1. Technical Specifications Overview The electronic architecture of this sensor is designed for NPN open-collector output systems, typical in PLC interfacing. | Parameter | Specification Details | | :--- | :--- | | **Output Type** | NPN Open Collector (indicated by the "/N" suffix) | | **Supply Voltage** | 12 to 24 VDC ±10% (Ripple P-P 10% max) | | **Pressure Range** | Low pressure / Gauge pressure (typically 0 to 101.3 kPa) | | **Current Consumption** | 40 mA or less (at 24 VDC) | | **Switching Capacity** | 30 VDC max, 100 mA max load current | | **Response Time** | 5 ms or less (Selectable/Adjustable in some firmware versions) | | **Display** | 3½ digit Red LED display | --- ### ## 2. Core Electronic Components The internal circuitry consists of four primary stages: 1. **Sensing Element (MEMS):** A silicon-based piezoresistive bridge. When pressure is applied, the resistance changes, generating a millivolt-level analog signal proportional to the pressure. 2. **Signal Conditioning (A/D Converter):** An internal high-resolution Analog-to-Digital converter translates the micro-voltages from the sensor into digital data for the CPU. 3. **Microcontroller (MCU):** The "brain" that handles unit conversion (kPa, bar, psi), zero-point adjustment, and hysteric logic for the outputs. 4. **Output Transistors (NPN):** The electronic switch. In an **NPN** configuration, the output pin connects to the **0V (Negative)** rail when the setpoint is reached. --- ### ## 3. Wiring Configuration The device typically uses a 4-wire color-coded cable standard for industrial sensors: | Wire Color | Signal Name | Function | | :--- | :--- | :--- | | **Brown** | Vcc (+) | 12-24 VDC Positive Supply | | **Blue** | 0V (-) | Common Ground | | **Black** | OUT 1 | NPN Open Collector Output 1 | | **White** | OUT 2 / Analog | NPN Open Collector Output 2 (or Analog 1-5V depending on sub-model) | --- ### ## 4. Electronic Protection Features * **Short-Circuit Protection:** The NPN outputs are protected against accidental overcurrent. * **Reverse Polarity Protection:** Prevents damage if the Brown and Blue wires are swapped. * **Noise Filtering:** Integrated RC filters to prevent "chatter" or false triggering caused by electromagnetic interference (EMI) from nearby motors or solenoids. ---