The **M5VS-FA-R** is a high-performance signal conditioner (isolator) manufactured by **M-System**. It is designed to accept a DC voltage or current input and provide an isolated DC output, typically used to prevent ground loops and protect sensitive control systems like PLCs or DCS. --- ### 1. Key Technical Specifications | Parameter | Specification Details | | :--- | :--- | | **Model Series** | M5-Unit Series (Ultra-slim design) | | **Input Signal** | 4 – 20 mA DC | | **Output Signal** | 4 – 20 mA DC | | **Power Input (R)** | 24V DC (Allowable range 24V ±10%) | | **Isolation** | 3-way isolation (input to output to power) | | **Dielectric Strength** | 2000V AC @ 1 minute | | **Response Time** | ≤ 25 msec (0 – 90%) | | **Accuracy** | ±0.1% of span | --- ### 2. Functional Components The "Electronic Parts" within this module work together to ensure signal integrity: * **Input Circuit:** Contains a precision shunt resistor (for current inputs) and surge protection to safeguard the unit against spikes. * **Isolation Barrier:** Uses an optical or magnetic isolator. This physically separates the input, output, and power circuits, preventing electrical noise from traveling across the system. * **Zero/Span Adjustments:** Located on the front panel. These are multi-turn potentiometers used to calibrate the output precisely to 0% and 100% of the scale. * **DC/DC Converter:** An internal power regulation circuit that converts the 24V DC input into the various internal voltages required for the operational amplifiers. --- ### 3. Model Number Breakdown Understanding the specific suffix of the **M5VS-FA-R**: * **M5VS:** Model series (Plug-in Signal Conditioner). * **F:** Input code (4 – 20 mA DC). * **A:** Output code (4 – 20 mA DC). * **R:** Power supply (24V DC). --- ### 4. Installation and Wiring The unit features a **DIN rail mount** and uses a base socket for easy maintenance (you can replace the electronic module without disconnecting the wires). ```text Terminal Connections: [1] Output (+) [2] Output (-) [3] Input (+) [4] Input (-) [5] Power (+) 24V [6] Power (-) 0V ```