The **EX47026-R0B** is a high-performance, managed industrial Ethernet switch typically manufactured by **EtherWAN**. It is designed specifically for harsh environments that require robust data management and high power delivery over Ethernet. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Total Ports** | 6 Ports (4x 10/100/1000Base-T + 2x 100/1000Base-SFP) | | **PoE Support** | IEEE 802.3at/af (PoE+ up to 30W per port) | | **Mounting** | DIN-Rail or Wall Mount | | **Operating Temp** | -40°C to 75°C (-40°F to 167°F) | | **Power Input** | 48VDC to 57VDC (Dual Redundant) | | **Enclosure** | IP30 Aluminum Case | --- ### 2. Core Electronic Components and Functions The internal architecture of the EX47026-R0B consists of several critical subsystems: #### A. The Switching Fabric (ASIC) At the heart of the device is a **Layer 2 Managed Switching Chip**. This processor handles the MAC address table, packet forwarding, and VLAN tagging. It supports a switching capacity (backplane) that ensures "wire-speed" performance across all 6 ports simultaneously. #### B. Power over Ethernet (PoE) Controllers The "R0B" variant features integrated PoE+ controllers. * **Power Budgeting:** It monitors the draw of connected devices (like IP cameras or wireless APs). * **Protection:** Includes over-current protection and short-circuit protection to prevent damage to the switch or the powered device (PD). #### C. SFP Transceiver Interfaces (Fiber Optic) The two SFP slots are high-speed interfaces that convert electrical signals to optical signals. These are used for: * **Long-distance backhaul:** Connecting to a central server miles away. * **EMI Immunity:** Fiber optics are not affected by the electromagnetic interference common in industrial settings. #### D. Industrial Grade Circuitry Unlike consumer switches, the electronic parts inside this unit are "hardened": * **TVS Diodes:** Transient Voltage Suppressors protect the Ethernet ports from power surges and ESD (Electrostatic Discharge). * **Electrolytic Capacitors:** Rated for high temperatures to ensure a long MTBF (Mean Time Between Failures). --- ### 3. Management and Software Features The electronic logic allows for advanced network control through a web interface or CLI: * **Redundancy Protocols:** Supports **Alpha-Ring** and **RSTP/MSTP** for sub-15ms recovery if a fiber link is cut. * **Quality of Service (QoS):** Prioritizes critical data (like industrial control signals) over standard traffic. * **IGMP Snooping:** Optimizes bandwidth for IP video surveillance. --- ### 4. Hardware Connectivity Diagram ```mermaid graph LR A[48V DC Power] --> B(Internal Power Regulator) B --> C{Main Controller/ASIC} C --> D[4x RJ45 PoE+ Ports] C --> E[2x SFP Fiber Ports] C --> F[Console Port/Management] ```