The **M2SP-11-R2/CE** is a high-performance **potentiometer transmitter** (also known as a signal conditioner) manufactured by M-System. It is designed to measure the position of a potentiometer (slidewire) and convert it into a standard industrial analog signal. ### 1. Key Technical Specifications The following table outlines the core electronic and operational characteristics of the device: | Feature | Specification | | :--- | :--- | | **Model Type** | Potentiometer Transmitter (Plug-in) | | **Input Range** | Total resistance 100 $\Omega$ to 10 k$\Omega$ | | **Output** | 4 – 20 mA DC (into max. 750 $\Omega$ load) | | **Power Input (R2)** | 100 – 120V AC (50/60 Hz) | | **Accuracy** | $\pm$0.1% of span | | **Response Time** | $\le$ 0.5 seconds (0 – 90%) | | **Isolation** | Input to output to power (3-way isolation) | | **Compliance** | CE Marking | --- ### 2. Functional Components The "Electronic Parts" of this device function together to ensure precision and signal integrity: #### A. Input Circuit (Potentiometer Interface) The device provides a constant reference voltage to the potentiometer. As the wiper moves, the varying voltage ratio is detected. It is designed to handle a wide range of resistance (100 $\Omega$ to 10 k$\Omega$) without recalibration for specific ohmic values, focusing instead on the percentage of rotation. #### B. Signal Conditioning & Isolation * **Isolation Transformer:** Provides magnetic isolation between the power supply, the input sensor, and the output signal. This prevents ground loops and protects sensitive PLC/DCS inputs from high-voltage surges. * **Zero/Span Adjustments:** Located on the front panel, these multi-turn potentiometers allow the user to fine-tune the 0% (Zero) and 100% (Span) points of the output signal. #### C. Output Driver The output stage is a constant-current circuit. Regardless of the resistance of the receiving instrument (up to 750 $\Omega$), the device ensures the current remains precisely proportional to the input position. --- ### 3. Model Code Breakdown: M2SP-11-R2/CE The alphanumeric code describes the specific electronic configuration: * **M2SP:** Series identifier (Mini-M Series Potentiometer Transmitter). * **1:** Input (Potentiometer). * **1:** Output (4 – 20 mA DC). * **R2:** Power Input (100 – 120V AC). * **CE:** Built to European Conformity standards (EMC and Safety). --- ### 4. Typical Application Circuit ```mermaid graph LR A[Potentiometer] -- Variable Voltage --> B(M2SP-11-R2) B -- 4-20mA Signal --> C[PLC / Controller] D[110V AC Power] --> B ```