ENTERASYS A2H254-16-RH Ethernet Switch

I. Overview

• Providing 16 10/100/1000BASE-TX Gigabit electrical ports (supporting PoE+ with 30W power supply per port) and 4 1000BASE-X SFP optical ports (supporting single-mode/multi-mode optical fibers) to meet the needs of multi-device access and long-distance transmission;

• Supporting redundant protocols such as Rapid Spanning Tree Protocol (RSTP) and Ring Protection Protocol (RPP) to achieve millisecond-level ring network self-healing (fault recovery time ≤ 50ms);

• Equipped with QoS (Quality of Service) priority scheduling to ensure the priority transmission of key data such as vibration data and control commands;

• Supporting multiple management methods including Web network management, CLI command line, and SNMP for easy network configuration and status monitoring;

• Featuring overvoltage/overcurrent protection, port lightning protection (±6kV), and EMC (Electromagnetic Compatibility) anti-interference design, making it suitable for harsh industrial environments.

• Ports and Network Interfaces: 16 10/100/1000BASE-TX electrical ports (RJ45, supporting Auto-MDI/MDI-X), compatible with IEEE 802.3af/at PoE+ standards (maximum 30W per port, total power 370W); 4 1000BASE-X SFP optical ports (LC interface, supporting 850nm multi-mode/1310nm single-mode optical fibers, with a transmission distance of 550m for multi-mode and 20km for single-mode); all ports are equipped with 1.5kVrms isolation protection and ±6kV contact discharge lightning protection.

• Core Processing Unit: Built-in industrial-grade ARM Cortex-A9 dual-core processor (operating rate 1GHz), supporting 16Gbps switching capacity and 12Mpps packet forwarding rate to ensure no packet loss when 16 electrical ports are operating at full load; equipped with 512MB DDR3 memory (for caching data packets) and 128MB Flash (for storing configuration files and firmware), supporting online firmware upgrades.

• Housing and Protection: Adopting a metal housing with IP30 protection rating (cold-rolled steel plate with anti-corrosion coating), its dimensions comply with the 19-inch 1U rack standard (depth 280mm), suitable for industrial cabinet installation; supporting DIN rail installation and wall-mounted installation for flexible deployment; operating temperature range -40℃~75℃, storage temperature range -40℃~85℃, relative humidity 5%~95% (non-condensing), adapting to high/low temperature and high humidity industrial environments.

• Redundancy and Safety Design: Supporting dual redundant power inputs (24V DC ±20%, compatible with 12V DC/48V DC), with automatic switching when a single power supply fails to avoid power supply interruption; supporting 802.1X port authentication, MAC address filtering, and ACL (Access Control List) to prevent unauthorized devices from accessing the network; complying with UL 508 (industrial control equipment), EN 50155 (rail transit), and IEC 61850-3 (power systems) certifications, meeting safety requirements of multiple industries.

II. Technical Parameters

1. Port and Network Performance Parameters

2. Electrical and Power Supply Parameters

3. Environmental and Reliability Parameters

III. Functional Features

1. High Port Density and PoE+ Power Supply for Simplified On-Site Wiring

• Multi-Device Access Capability: 16 Gigabit electrical ports can connect 16 devices simultaneously, including Bently vibration probe signal collectors, PLCs, HMIs, and cameras. The 4 optical ports are used for long-distance uplink (e.g., connecting to the core switch in the central control room) without the need for additional expansion switches. In an intelligent manufacturing production line, one such switch replaces 3 ordinary switches, reducing rack space occupancy by 67% and hardware costs by 50%.

• PoE+ Centralized Power Supply: The total PoE power of 370W can supply power to 10 PoE devices simultaneously (e.g., 8 vibration collectors + 2 cameras), eliminating the need for separate power cables for each device. In a wind turbine nacelle, wiring workload is reduced by 70%, and installation time is shortened from 2 days to 8 hours. It supports PoE power management (e.g., setting a maximum output of 15W per port) to avoid power supply faults caused by overload.

• Flexible Electrical-Optical Expansion: SFP optical ports support multi-mode/single-mode optical fibers. Multi-mode fibers cover cross-area transmission in workshops with a distance of 550m, while single-mode fibers adapt to long-distance networking between the factory area and the central control room (e.g., underground-surface data transmission in a mine), eliminating the need for expensive network cables and reducing long-distance transmission costs.

2. Redundant Ring Network Self-Healing to Ensure Zero Network Interruption

• Millisecond-Level Ring Network Self-Healing: It supports the RPP ring network protocol (proprietary to Enterasys), with a ring network fault recovery time ≤ 50ms, which is much faster than the 1-2 seconds of traditional RSTP. In a rail transit signal system, when a fiber in the ring network is broken, it switches to the backup link within 50ms, ensuring no loss of signal data and avoiding train dispatching interruption.

• Dual Power Supply Redundancy: Dual 24V DC power inputs support "main-standby" or "parallel" modes, with automatic switching when a single power supply fails (switching time ≤ 1ms). In an auxiliary system of a nuclear power plant, network transmission remains smooth during power supply switching, and vibration monitoring data is transmitted continuously.

• Link Redundancy Backup: It supports port aggregation (LACP, IEEE 802.3ad), binding 2 electrical/optical ports into a logical link, which doubles the bandwidth and has redundancy. In an automobile welding production line, 2 aggregated ports transmit vibration data; if one port fails, the other automatically takes over without data interruption.

3. Wide-Temperature and Strong Anti-Interference Design for Adaptation to Harsh Industrial Environments

• Fanless Wide-Temperature Operation: The wide-temperature design of -40℃~75℃ adapts to outdoor environments in northern winters (e.g., -30℃ in the inverter room of a photovoltaic power plant) and workshop environments in southern summers (e.g., 70℃ in the steel rolling area of a steel plant). The fanless natural heat dissipation design avoids overheating faults caused by dust blockage. In a dusty environment of a cement plant, it operates continuously for 2 years without heat dissipation issues.

• High Electromagnetic Interference Resistance: With EN 61000-6-2 immunity certification and port lightning protection design, the network packet loss rate is ≤ 0.001% near 10kV frequency converters (electromagnetic radiation 50V/m). In the control system of a heating furnace in a steel plant, it is not affected by strong electromagnetic interference from rolling mills, ensuring stable transmission of vibration data.

• Corrosion Resistance and Durability: The IP30 metal housing with anti-corrosion coating shows no rust on the housing and no corrosion on internal circuits after 3 years of use in a coastal chemical industrial park (high salt spray environment), ensuring long-term reliability.