The **M2CEC-1101-R2** is a specific electronic carrier board (or adapter) typically associated with **IEI Integration Corp**. It is designed to bridge M.2 slots with specific expansion interfaces, most commonly used in industrial computing and embedded systems. Below is a breakdown of its technical specifications and electronic components. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Model Name** | M2CEC-1101-R2 | | **Form Factor** | M.2 to PCIe / USB Expansion | | **Input Interface** | M.2 Key E (2230) | | **Output Interface** | Various (often includes COM ports or specific IO) | | **Operating Temperature** | -20°C to 60°C (Industrial Grade) | | **Compliance** | RoHS / CE / FCC | --- ### 2. Functional Electronic Components The "parts" of this board consist of the physical PCB layout and the active/passive components that facilitate signal conversion: #### A. M.2 Edge Connector The board features an **M.2 Key E** gold-finger interface. This is the primary input point that plugs into a motherboard or an industrial Single Board Computer (SBC). It utilizes PCIe and USB signal lanes provided by the host. #### B. Controller ICs (Signal Conversion) Depending on the specific revision used for serial expansion: * **UART Controller:** Often contains an Exar or FTDI-based chip to convert PCIe/USB signals into RS-232/422/485 serial communication. * **Voltage Regulators:** On-board LDO (Low Dropout) regulators to step down the 3.3V power provided by the M.2 slot to the specific voltages required by the auxiliary chips (usually 1.8V or 1.2V). #### C. Physical Headers and Ports * **Pin Headers:** The R2 version typically features vertical pin headers for connecting external cables (e.g., DB9 cables for COM ports). * **Protection Circuitry:** Includes TVS (Transient Voltage Suppressor) diodes to protect the motherboard from static electricity (ESD) when plugging in external peripherals. --- ### 3. Architecture Overview The M2CEC-1101-R2 acts as a **Signal Bridge**. Its electronic design follows this flow: 1. **Host Communication:** Receives 3.3V Power and PCIe/USB differential pairs via the M.2 slot. 2. **Signal Translation:** Active ICs on the board translate high-speed serial data into standard industrial protocols. 3. **Output:** Signals are routed to standard 2.0mm or 2.54mm pitch headers for system integration. --- ### 4. Common Use Cases * Adding extra **COM ports** (RS-232) to compact NUCs or Industrial PCs. * Interfacing with legacy industrial sensors in space-constrained environments. * Expanding I/O on IEI-specific hardware platforms like the WAFER or KINO series.