The **M2UDS2-CB-R2** is a specific model within the **M2 Series** of signal conditioners manufactured by **M-System**. This particular unit is a **Potentiometer Transmitter**, designed to detect the position (resistance) of a potentiometer and convert it into a standard DC output signal. --- ### 1. Model Breakdown The alphanumeric code describes the specific hardware configuration: | Code Segment | Description | | :--- | :--- | | **M2UDS2** | Base model: Potentiometer Transmitter (Plug-in type) | | **-C** | Power Input: 24V DC | | **-B** | Output 1: 2 to 10V DC | | **-R2** | Output 2: 4 to 20mA DC | --- ### 2. Key Technical Specifications Below are the electronic characteristics essential for integration: | Feature | Specification | | :--- | :--- | | **Input Type** | Potentiometer (3-wire) | | **Input Resistance** | Total resistance 100 $\Omega$ to 10 k$\Omega$ | | **Reference Voltage** | Approx. 0.5V DC | | **Output 1 (Voltage)** | 2 – 10V DC (Load resistance $\geq$ 10 k$\Omega$) | | **Output 2 (Current)** | 4 – 20mA DC (Load resistance $\leq$ 350 $\Omega$) | | **Power Supply** | 24V DC ($\pm$10%, ripple 10% p-p max) | | **Isolation** | 3-way (Input to Output to Power) | | **Response Time** | $\leq$ 0.5 seconds (0 – 90%) | --- ### 3. Electronic Architecture The M2UDS2 functions through several internal electronic stages: 1. **Input Conditioning:** The device applies a small reference voltage across the potentiometer. The wiper position creates a ratio-metric voltage. 2. **Isolation Barrier:** Uses optical or magnetic coupling to isolate the input circuit from the output and power circuits. This prevents ground loops and protects the PLC/DCS from surges. 3. **Signal Conversion:** An internal amplifier scales the millivolt-level signal from the potentiometer to the desired linear DC range. 4. **Dual Output Driver:** The "R2" designation indicates independent drivers for the voltage and current outputs, allowing you to send the signal to two different devices (e.g., a local display and a remote PLC). --- ### 4. Connection Diagram (Standard) The unit typically uses a 10-pin or 11-pin plug-in base. ```text [Input Terminals] Pin 1: High (CW) Pin 2: Wiper Pin 3: Low (CCW) [Output Terminals] Pin 4(+)/5(-): Output 1 (2-10V) Pin 6(+)/7(-): Output 2 (4-20mA) [Power] Pin 10(+)/11(-): 24V DC ``` ---