Based on the product code provided, the **M2MST-Z-R2/N** belongs to the **M2 Series** of signal conditioners manufactured by **M-System** (now part of **MG CO., LTD.**). Specifically, this model is a **Potentiometer Transmitter**. It is designed to track the position of a potentiometer (slidewire) and convert that resistance change into a standard instrumentation signal (like 4-20mA or 0-10V). --- ## Technical Specifications Breakdown The alphanumeric suffix in the model number defines the specific electronic configuration: | Segment | Code | Description | | :--- | :--- | :--- | | **Model** | M2MST | Potentiometer Transmitter (Plug-in type) | | **Input** | Z | Potentiometer (Total resistance 100 $\Omega$ to 10 k$\Omega$) | | **Output** | R2 | 4 – 20 mA DC (Load resistance 550 $\Omega$ max) | | **Power Input** | /N | 100 – 240V AC (Operating voltage range 85 – 264V) | --- ## Key Features ### 1. Galvanic Isolation This device provides three-way isolation between: * **Input** (The potentiometer/sensor) * **Output** (The PLC/Controller/DCS) * **Power** (The AC supply) This protects sensitive control electronics from ground loops and electrical surges. ### 2. High Resolution and Accuracy * **Accuracy:** Typically within ±0.1% of span. * **Temp. Coefficient:** ±0.015% per °C. ### 3. Physical Design * **Construction:** Plug-in base structure. * **Wiring:** Terminals are located on the base, allowing the electronic module to be replaced without disconnecting wires. * **LED Indicator:** Power indicator on the front panel. --- ## Wiring and Connections The device typically follows a standard terminal pin-out for the M2 series base: | Terminal No. | Function | Connection Type | | :--- | :--- | :--- | | **1** | Output (+) | 4-20mA Signal | | **2** | Output (-) | Common | | **3** | Input (1) | Potentiometer High | | **4** | Input (2) | Potentiometer Wiper | | **5** | Input (3) | Potentiometer Low | | **7** | Power (L) | 100-240V AC | | **8** | Power (N) | 100-240V AC | --- ## Application Use Case This part is commonly used in industrial automation for: * **Valve Position Feedback:** Converting the mechanical rotation of a valve into a 4-20mA signal for a PLC. * **Level Sensing:** Using a float-operated potentiometer to measure tank levels. * **Actuator Tracking:** Monitoring the stroke position of linear actuators.