The **DL30-G-R** is a high-performance, web-enabled remote terminal unit (RTU) and data logger manufactured by **M-System**. It is primarily used in industrial automation for remote monitoring, data acquisition, and IoT gateway applications. --- ## 1. Core Electronic Components & Architecture The device is built on an industrial-grade embedded architecture designed for 24/7 reliability. | Component Category | Description | | :--- | :--- | | **CPU / Processor** | High-speed 32-bit embedded microprocessor for real-time OS (RTOS) handling and web serving. | | **Memory** | Internal non-volatile memory for OS and logging; supports SD Card expansion for long-term data storage. | | **Communication Chips** | Integrated Ethernet controllers (100BASE-TX) and serial interface drivers (RS-485). | | **Power Supply Unit** | DC-powered (usually 24V DC) with internal filtering to handle industrial noise and ripples. | --- ## 2. Interface and Connectivity Features The electronic design focuses on bridging local sensor data to wide-area networks (WAN). ### A. I/O Expansion The DL30-G-R acts as a "Base Module." It connects to various **R30 series I/O modules** via a backplane bus. * **Analog Input:** 0-10V, 4-20mA. * **Discrete Input:** Dry contacts or 24V DC signals. * **Relay Outputs:** For remote control of machinery. ### B. Network Protocols The internal firmware supports standard industrial protocols: * **Modbus/TCP:** To communicate with PLCs and HMIs. * **HTTP/HTTPS:** For the built-in web server used for configuration and data viewing. * **FTP/SFTP:** For uploading logged data files to a remote server. * **SMTP:** For sending email alerts based on alarm triggers. --- ## 3. Physical & Electrical Specifications | Specification | Details | | :--- | :--- | | **Supply Voltage** | 24V DC (Operating range: 24V ±10%) | | **Current Consumption** | Approx. 130 mA (Base unit only) | | **Isolation** | 1500V AC between network, I/O, and power. | | **Mounting** | DIN rail mounting (35mm). | | **Local Port** | Mini-B USB port for local PC configuration. | --- ## 4. Operational Logic 1. **Data Collection:** The unit polls data from attached I/O modules or Modbus slaves. 2. **Processing:** It applies scaling, alarm limits, and timestamping. 3. **Storage:** Data is written to the internal memory or SD card in CSV format. 4. **Reporting:** The electronic logic triggers a data upload via FTP or sends an email if a threshold is breached.