ENTERASYS A4H124-24FX P0973JN

Description

Product Description

The ENTERASYS A4H124-24FX, with the specific part number P0973JN, is an industrial-grade, fully managed Ethernet switch from the Enterasys (now part of Extreme Networks) A4 product line, designed specifically for deployment in harsh and mission-critical automation environments. This switch serves as the robust communication backbone for a control network, reliably connecting programmable logic controllers (PLCs), human-machine interfaces (HMIs), drives, and other Ethernet-enabled devices. The ENTERASYS A4H124-24FX is engineered to deliver deterministic, low-latency data transmission essential for real-time control applications, while withstanding extreme temperatures, vibration, and electrical noise. For detailed technical specifications, configuration guides, and firmware information, the primary resource is the official Extreme Networks documentation portal for the ENTERASYS A4H124-24FX. Implementing a network with the A4H124-24FX ensures high availability and network integrity, which are fundamental for modern Industrial Internet of Things (IIoT) and Industry 4.0 applications. Its ruggedized design makes it a preferred choice for direct installation in control cabinets on the factory floor.

Product Parameters

• Manufacturer / Brand: Enterasys (Extreme Networks).
• Model / Series: A4H124-24FX.
• Part Number: P0973JN.
• Form Factor: Industrial hardened, DIN-rail mountable enclosure.
• Port Configuration: 24 ports of 10/100Base-FX (100 Mbps) multi-mode fiber optic connections, using SFP (mini-GBIC) transceivers.
• Uplink Ports: Typically includes additional copper or fiber combo ports for network uplinks or ring redundancy.
• Switching Capacity: Backplane switching capacity suitable for full wire-speed performance on all ports.
• Management: Fully managed layer 2 switch with support for protocols such as SNMP, RMON, VLANs (802.1Q), QoS (802.1p), Rapid Spanning Tree Protocol (RSTP), and often proprietary ring protocols (e.g., EAPS) for fast network redundancy (<50ms recovery).
• Power Supply: Dual, redundant 24V DC or 110/240V AC power inputs for high availability.
• Environmental Rating: Typically rated for wide operating temperatures (e.g., -40°C to 75°C) and conforms to industrial standards for shock, vibration, and EMI/RFI immunity.
• Certifications: Commonly carries hazardous location certifications (Class I Div 2) for use in areas with potential explosive atmospheres.

Advantages and Features

• Extreme Environmental Robustness: Built to operate reliably in the harshest industrial conditions where temperature, humidity, and vibration would cause a commercial switch to fail.
• Deterministic Network Performance: Features like hardware-based QoS and fast-redundancy ring protocols (e.g., <50ms recovery) ensure timely delivery of critical control traffic, preventing production interruptions.
• High Network Availability: Redundant power inputs and support for redundant network topologies (rings) eliminate single points of failure in the network infrastructure.
• Enhanced Security: Managed features allow for port security, VLAN segmentation to isolate control traffic, and access control lists (ACLs) to protect critical automation assets from unauthorized access.
• Fiber-Optic Dominance: The all-fiber port design (-24FX) provides complete immunity to electromagnetic interference (EMI), ground loop problems, and allows for long-distance connections (up to kilometers) between cabinets or across a plant floor.

Application Cases in Industry

• Automotive Manufacturing Plant: Forms a redundant fiber-optic ring backbone connecting PLCs, robots, and vision systems across painting, body-in-white, and final assembly shops, immune to weld shop EMI.
• Oil & Gas Pipeline SCADA: Deployed in remote pump and compressor stations to create a long-distance, intrinsically safe network for transmitting sensor and control data back to a central control room.
• Water/Wastewater Treatment: Used in distributed control panels across a treatment facility, withstanding humid environments and connecting to remote I/O and instrument clusters via fiber.
• Power Generation Substations: Installed in switchgear and control buildings where electrical noise is extreme, providing reliable communication for protection relays and RTUs.
• Food & Beverage Processing: Employed in wash-down areas or refrigerated environments where moisture and cold temperatures are present, connecting processing and packaging lines.

Comparison with Competing Products

Competing products include industrial Ethernet switches from Siemens (SCALANCE X), Rockwell Automation (Stratix 5400/5700), Moxa, and Hirschmann. The ENTERASYS A4H124-24FX distinguishes itself with its heritage in high-performance enterprise networking applied to an industrial form factor, offering very sophisticated management and security features. Compared to an unmanaged switch, it provides critical control over traffic and network resilience. Against other managed industrial switches, the A4H124-24FX is particularly noted for its robust fiber-optic focus, extreme environmental specs, and the advanced feature set inherited from the Enterasys/Extreme Networks networking pedigree, often appealing to network engineers familiar with enterprise protocols.

Selection Suggestions and Precautions

• Selection Suggestions:
  1. Select the ENTERASYS A4H124-24FX for core network infrastructure in large, harsh, or mission-critical industrial plants where fiber-optic media and advanced network management are required.
  2. Choose this model specifically when building a redundant ring topology to maximize network uptime. Ensure all switches in the ring support the same fast-ring protocol.
  3. Verify the required SFP transceiver modules (e.g., multi-mode, correct wavelength) are purchased separately and are compatible.
• Precautions:
  1. Professional Configuration Required: As a fully managed switch, it requires proper configuration by a network engineer knowledgeable in industrial protocols. Default settings are not suitable for a secure, optimized control network.
  2. Fiber Handling: Proper handling, cleaning, and termination of fiber-optic cables are crucial. Damaged connectors or dirty ends will cause link failures and performance issues.
  3. Grounding and Power: Even with fiber ports, the switch chassis must be properly grounded. Use isolated and clean 24V DC power supplies for the dual inputs to realize the full benefit of power redundancy.
  4. Firmware and Lifecycle: Check for the latest stable firmware version to ensure security and feature updates. As an Enterasys product, be mindful of its product lifecycle stage under Extreme Networks.
  5. Sourcing and Support: Use the exact part number P0973JN for procurement. Source from authorized distributors to ensure genuine hardware and access to firmware and technical support. Ensure you have the necessary configuration tools and documentation.

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