The **EX87424-R3BW** is a high-performance industrial-grade Ethernet switch, typically manufactured by companies like **EtherWAN**. This specific model is designed for rugged environments, providing robust connectivity for critical infrastructure. --- ## 1. Core Technical Specifications The "EX87424" series follows a specific port and power configuration. Below are the primary electronic components and interfaces: | Component | Specification | | :--- | :--- | | **Total Ports** | 12 Ports | | **Copper Ports** | 8 x 10/100/1000BASE-T (RJ45) | | **Fiber Ports** | 4 x 100/1000BASE-SFP Slots | | **Management** | Layer 2 Managed (SNMP, Web, Telnet, CLI) | | **Mounting** | DIN-Rail or Wall Mount | | **Enclosure** | IP30 Aluminum Case | --- ## 2. Power and Electrical Characteristics The "R3BW" suffix often denotes specific power input and temperature ratings. These devices are built with industrial power redundancies. * **Redundant Power Inputs:** Includes terminal blocks for dual DC power inputs to ensure zero downtime if one power source fails. * **Input Voltage:** Usually supports a wide range (e.g., 12-48VDC or 18-57VDC). * **Protection Circuits:** * **Overload Current Protection:** Prevents internal component damage during surges. * **Reverse Polarity Protection:** Protects the PCB if the DC leads are swapped. --- ## 3. Key Electronic Features ### A. Switching Fabric and Throughput The internal ASIC (Application-Specific Integrated Circuit) is designed for "Wire-Speed" performance, meaning the electronic backplane can handle the maximum theoretical data rate of all ports simultaneously without dropping packets. ### B. Industrial Hardening (The "R3" Factor) The "R3" in the part number often indicates a specific revision or environmental rating: * **Operating Temperature:** -40°C to 75°C (-40°F to 167°F). * **EMI/EMS:** High resistance to electromagnetic interference, essential for deployment near large motors or high-voltage lines. * **Shock/Vibration:** Certified to IEC 60068 standards for stability in moving machinery. ### C. SFP Interfaces The 4 SFP slots allow for the use of optical transceivers. This enables: * **Galvanic Isolation:** Fiber optics are immune to electrical noise and ground loops. * **Distance:** Capability to transmit data over several kilometers using Single-Mode fiber. --- ## 4. Hardware Management Interfaces 1. **Console Port:** Usually an RJ45 or RS-232 port for out-of-band management. 2. **Relay Output:** A physical dry contact (Fault Alarm) that triggers if a port goes down or power is lost, allowing for integration with external PLC systems. 3. **LED Indicators:** High-intensity LEDs for Power (P1, P2), Fault, and Link/Activity for each port.