The part number **M2AS1-A311-R2/CE** typically refers to a specialized industrial computing component, often associated with **IEI Integration Corp** or similar industrial hardware providers. Specifically, it belongs to the **M2AS series** of M.2 modules, usually functioning as a serial communication expansion card. --- ### 1. General Specifications This device is designed to add serial connectivity to industrial PCs via an M.2 slot. | Feature | Specification | | :--- | :--- | | **Form Factor** | M.2 A-E Key (2230) | | **Interface** | PCIe x1 | | **Controller** | ASIX AX99100 (Common for this series) | | **Connectivity** | 1 or 2 Ports (RS-232/422/485) | | **Operating Temp** | -20°C to +70°C (Industrial Grade) | | **Certification** | CE / FCC Compliant | --- ### 2. Breakdown of the Part Number Industrial parts use specific nomenclature to define their build: * **M2AS**: Indicates the M.2 series for Asynchronous Serial communication. * **A311**: Refers to the specific hardware revision and the internal IC mapping (often indicating a single or dual port configuration). * **R2**: Revision 2.0 (indicates a hardware update or PCB layout improvement over the original version). * **CE**: Confirms European Conformity (safety and EMC standards). --- ### 3. Key Electronic Components Inside this module, you will find the following core electronics: 1. **ASIC Controller**: Manages the bridge between the PCIe bus and the Serial UART signals. 2. **Transceiver ICs**: These chips (e.g., SP3243 or similar) convert the low-voltage logic signals from the controller to high-voltage RS-232 levels or differential RS-422/485 levels. 3. **Isolation (Optional)**: High-end versions of this card include optical isolators to protect the host PC from voltage surges on the serial lines. 4. **Voltage Regulators**: Step down the 3.3V provided by the M.2 slot to the internal core voltages required by the controller. --- ### 4. Common Pinout (M.2 A-E Key) The board draws power and data through the M.2 interface: ```text Pins 1-75: PCIe signals (REFCLK, PER, PET) Voltage: 3.3V DC I/O Logic: 3.3V ``` --- ### 5. Application Use Cases * **POS Systems**: Connecting receipt printers or barcode scanners. * **Industrial Automation**: Interfacing with PLCs (Programmable Logic Controllers). * **Medical Equipment**: Data logging from legacy medical sensors. * **IoT Gateways**: Adding physical communication layers to edge computing devices.