The **EX87424-R4BW** is a high-performance, industrial-grade Managed Ethernet Switch typically manufactured by **EtherWAN**. It is designed for mission-critical environments such as smart city infrastructure, transportation systems, and industrial automation. Below is a breakdown of its electronic components, specifications, and architecture. --- ### 1. Port Configuration & Physical Layer (PHY) The "87424" designation typically refers to the port density and type: * **10/100/1000Base-TX:** Equipped with 8 Copper ports (RJ45) supporting Gigabit speeds. * **SFP Slots:** Usually features 4 Dual-rate SFP slots (100/1000Base) for fiber optic uplink connectivity. * **Auto-MDI/MDIX:** Electronic sensors that automatically detect straight-through or crossover cable types. ### 2. Core Processing & Switching Fabric The internal electronic architecture is built to handle heavy data loads without latency: * **Switching Capacity:** Generally provides a non-blocking switching fabric (around 24Gbps) to ensure wirespeed performance across all ports. * **Packet Buffer:** Integrated high-capacity memory to prevent data loss during traffic bursts. * **EEPROM/Flash:** Stores firmware and configuration settings, allowing for "Managed" features like VLANs and QoS. ### 3. Power Supply Unit (PSU) & Protection As an industrial device, the electronic power management is robust: | Component | Specification | | :--- | :--- | | **Input Voltage** | Redundant 12-48VDC Terminal Block | | **Power Consumption** | Low-wattage design for heat reduction | | **Protection** | Reverse Polarity Protection & Overload Current Protection | | **Isolation** | 1.5kV Magnetic Isolation on Ethernet ports | ### 4. Management & Intelligence (Layer 2) The internal logic supports advanced software-defined networking features: * **Redundancy Protocols:** Supports **Alpha-Ring**, RSTP, and MSTP for sub-15ms recovery in case of link failure. * **Security:** Hardware-based MAC address filtering and IEEE 802.1X port-based security. * **Diagnostics:** Digital Diagnostic Monitoring (DDM) for fiber SFPs to monitor laser power and temperature. --- ### Technical Specifications Summary | Feature | Details | | :--- | :--- | | **Housing** | IP30 Aluminum Case (Fanless) | | **Operating Temp** | -40°C to 75°C (-40°F to 167°F) | | **Mounting** | DIN-Rail or Wall Mount | | **Alarm Contact** | Relay output for power or port failure notification | ---