The **M5VS-C2W-R** is a high-performance **Signal Conditioner** (specifically a Bridge Excitation / Strain Gauge Transmitter) manufactured by **M-System**. It is part of the M5-UNIT series, known for its ultra-slim design and high density. --- ## 1. Core Technical Specifications The M5VS-C2W-R is designed to interface with strain gauge sensors (load cells) and convert their millivolt signals into standard industrial DC signals. | Feature | Specification | | :--- | :--- | | **Input Type** | Strain Gauge (Bridge) | | **Output Type** | 4 – 20 mA DC (Source) | | **Power Input** | 24V DC (±10%) | | **Excitation Voltage** | 2V or 5V DC (Selectable) | | **Response Time** | ≤ 25 ms (0 – 90%) | | **Accuracy** | ±0.1% of span | | **Form Factor** | 5.9 mm Ultra-slim housing | --- ## 2. Key Electronic Components & Design The device is comprised of several critical electronic sub-systems to ensure precision and isolation. ### A. The Input Stage (Bridge Excitation) * **Precision Voltage Reference:** The device provides a stable excitation voltage to the bridge sensor. Since load cell accuracy depends on the stability of the supply, this circuit is highly regulated. * **Differential Amplifier:** It uses a high-impedance instrumentation amplifier to detect the minute change in voltage (mV) from the strain gauge. ### B. Signal Processing & Isolation * **Isolation Barrier:** The "C" in the model number often refers to the isolation characteristics. It provides 2000V AC isolation between input, output, and power. This prevents ground loops and protects the PLC/DCS from surges. * **Zero/Span Adjustments:** Located on the front panel, these allow for manual calibration of the electronic offset and gain. ### C. Output Driver * **Current Loop Controller:** The **"W"** in the model suffix indicates the specific output range (4-20mA). It uses a constant-current source circuit to ensure the signal remains accurate even if the wire resistance changes over long distances. --- ## 3. Terminal Connection Diagram The M5VS series uses a tension-clamp or screw terminal system depending on the specific base. | Terminal No. | Function | Description | | :--- | :--- | :--- | | **1** | Excitation (+) | Bridge Supply Positive | | **2** | Excitation (-) | Bridge Supply Negative | | **3** | Input (+) | Signal from Sensor | | **4** | Input (-) | Signal from Sensor | | **5** | Output (+) | 4-20mA Signal Output | | **6** | Output (-) | Signal Return | | **7** | Power (+) | +24V DC | | **8** | Power (-) | 0V DC | --- ## 4. Model Number Breakdown * **M5VS**: Series Name (Ultra-slim Signal Conditioner) * **C2**: Input Type (Bridge/Strain Gauge) * **W**: Output Type (4-20mA DC) * **R**: Power Input (24V DC)