The part number **M2RTS-R-CZ-R2/UL** refers to a specific configuration of a **Signal Conditioner / Transmitter** from the M2 Series by **M-System** (a specialized manufacturer of industrial instrumentation and automation components). Specifically, this is a **Resistor Transmitter** used to convert a potentiometer or variable resistor signal into a standard industrial DC signal. --- ### Part Number Breakdown | Segment | Meaning | Description | | :--- | :--- | :--- | | **M2RTS** | Model Series | Resistor Transmitter (M2 Series Mini-M) | | **-R** | Power Input | 24V DC | | **-C** | Input Signal | Potentiometer/Resistor (100 $\Omega$ to 10 k$\Omega$) | | **-Z** | Output Signal | Specify (Usually a custom DC voltage or current) | | **-R2** | Option | Specific design revision or configuration | | **-UL** | Certification | UL / cUL Class I, Div 2 Approval | --- ### Technical Specifications The device acts as a bridge between a physical resistance change (like a float level sensor or valve positioner) and a PLC/DCS system. #### 1. Input Section * **Sensor Type:** 3-wire potentiometer or variable resistor. * **Reference Voltage:** Typically around 0.5V DC. * **Resistance Range:** Standard 100 $\Omega$ to 10 k$\Omega$. #### 2. Output Section * **Signal Type:** Isolated DC output. * **Common Ranges:** 4–20mA, 0–10V, or 1–5V (depending on the "Z" specification). * **Isolation:** 3-way isolation (input to output to power). #### 3. Physical & Environmental * **Construction:** Plug-in socket base for easy maintenance. * **Housing:** Flame-resistant resin. * **Mounting:** DIN rail or surface mounting. --- ### Connection Diagram (Simplified) ```text POTENTIOMETER INPUT POWER INPUT (24V DC) [1] CW [7] + [2] Wiper <----| [8] - [3] CCW | | DC OUTPUT | [4] + | [5] - ``` --- ### Key Features 1. **Isolation:** Provides 2000V AC isolation between the input, output, and power supply, protecting sensitive PLC equipment from ground loops and surges. 2. **Linearization:** It converts the linear resistance change into a proportional DC signal. 3. **UL Listing:** The `/UL` suffix indicates the device is rated for use in North American hazardous locations (Class I, Division 2).