Description

The ENTERASYS A2H254-16 P0973BK​is a compact,rugged managed Ethernet switch from Enterasys Networks,designed specifically for deployment in demanding industrial environments.This 16-port Layer 2 switch provides reliable,deterministic network connectivity for industrial automation,process control,and other critical applications where commercial-grade networking equipment would fail.It serves as a resilient and intelligent network backbone,ensuring continuous data flow between PLCs,HMIs,drives,and controllers.

Application Scenarios

In an automotive manufacturing plant,robotic welding cells,programmable controllers,and vision inspection systems are distributed across a noisy,vibration-prone assembly line.A standard office switch would quickly succumb to electrical interference,temperature swings,and physical shock.The ENTERASYS A2H254-16 P0973BK,mounted on a DIN rail inside a control cabinet,forms the robust core of each cell’s local network.Its 16 Fast Ethernet ports connect all devices,while its two Gigabit uplink ports(which can be fitted with SFP fiber modules like the P0973BK)create a high-speed,noise-immune backbone to the plant’s main network.The switch’s managed capabilities allow engineers to implement VLANs to segment robot traffic from I/O traffic,use QoS to prioritize critical control messages,and enable Rapid Spanning Tree Protocol(RSTP)for a self-healing network loop that recovers in milliseconds,not minutes,after a link failure.This reliability directly prevents multi-million dollar production line stoppages caused by simple network hiccups,addressing the critical need for network determinism and uptime in modern manufacturing.

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Main Parameters

Value/Description

Product Model​

A2H254-16 P0973BK​

Manufacturer​

Enterasys Networks(Part of Extreme Networks)

Product Category​

Managed Industrial Ethernet Switch

Copper Ports​

16 x 10/100Base-TX RJ-45 ports(Auto-MDI/MDIX)

Fiber Uplink Ports​

2 x 100/1000Base-X SFP slots(SFP modules sold separately)

Performance​

12 Gbps switching capacity,8.9 Mpps forwarding rate

Operating Temperature​

-40°C to 75°C(-40°F to 167°F)

Power Input​

12-48 VDC(Redundant Inputs)or 24 VAC;Supports 24 VDC from P0973BK kit

Mounting​

Standard DIN-Rail(35mm)or panel mounting

Management​

Layer 2 Managed;Web(HTTP/HTTPS),CLI(Telnet/SSH),SNMP

Key Protocols​

IEEE 802.1Q(VLAN),802.1p(QoS),802.1w(RSTP),802.3ad(LACP)

Robustness​

EN 61000-6-2/4(Industrial EMI Immunity/Emission),cULus Listed,Class 1 Div 2

Note on P0973BK​

The”P0973BK”suffix typically indicates a specific configuration kit,often including a 24VDC power supply and mounting accessories.

Technical Principles and Innovative Values

The ENTERASYS A2H254-16 P0973BK​is engineered from the ground up for industrial reliability,prioritizing deterministic performance and physical robustness over raw consumer-grade bandwidth.

Innovation Point 1:Industrial Hardening for Extreme Environments:​The switch’s core innovation is its ability to operate reliably where standard switches cannot.Its extended operating temperature range(-40°C to 75°C)ensures functionality in unheated outdoor enclosures or near high-temperature machinery.Its design resists high levels of electromagnetic interference(EMI)from motor drives and welders,and its robust construction tolerates significant shock and vibration,preventing physical connection failures.

Innovation Point 2:Deterministic Networking for Control Systems:​Unlike”best-effort”office switches,the A2H254-16 P0973BK​provides features critical for real-time control.It supports IEEE 802.1p Quality of Service(QoS),allowing network traffic from critical devices(like a safety PLC)to be tagged and prioritized,ensuring low-latency delivery even during network congestion.Combined with Rapid Spanning Tree Protocol(RSTP),it creates a fault-tolerant network topology that can reconfigure in under 500ms,minimizing disruption to time-sensitive automation protocols like EtherNet/IP or PROFINET.

Innovation Point 3:Flexible,Fault-Tolerant Connectivity and Power:​The dual-purpose Gigabit SFP slots allow for flexible media conversion,enabling the use of long-range fiber optic cables for noise-immune backbone connections between cabinets.The switch supports redundant DC power inputs(12-48 VDC),allowing it to be connected to two separate power sources.This,combined with the robust 24VDC power supply often included in the P0973BK kit,provides a complete,fault-tolerant power solution that prevents a single power supply failure from taking down a critical network segment.

Application Cases and Industry Value

Case Study:Modernizing a Water Treatment SCADA Network

A large municipal water authority needed to upgrade the aging,unreliable serial-based network connecting PLCs across its sprawling treatment plant and remote pump stations.The new design required a robust,managed Ethernet backbone capable of handling SCADA data,video surveillance,and VoIP,all while withstanding outdoor temperature extremes and lightning-induced surges.The ENTERASYS A2H254-16 P0973BK​was deployed in NEMA enclosures at each site.

Process&Improvement:​At each site,the switch’s 16 copper ports connected local PLCs,motor starters,and chemical dosing controllers.Its SFP slots were populated with 1Gb fiber modules,creating a high-speed,lightning-immune ring topology between sites using RSTP.VLANs segmented control traffic from IT traffic,ensuring SCADA system security and performance.The switch’s wide temperature range and EMI immunity proved crucial during summer heat and electrical storms.The network team reported a 99.99%uptime for the SCADA system post-implementation,compared to frequent outages with the old system.The plant superintendent noted,”The reliability of the A2H254-16​switches has been transformational.We now have real-time visibility and control from the central control room,and network-related maintenance calls have dropped to nearly zero.”

Case Study:Creating a Resilient Machine Cell Network for a Tier-1 Automotive Supplier

An automotive parts manufacturer building a new high-speed stamping line required a network that could keep pace with sub-second machine cycles.Any network latency or packet loss would cause synchronization faults between robots and presses.The integrator specified the ENTERASYS A2H254-16 P0973BK​for each machine cell.

Process&Improvement:​The switches were installed in the main control cabinets.QoS was configured to prioritize PROFINET RT(Real-Time)traffic from the Siemens controllers,guaranteeing bandwidth and latency for motion control.The switches’fast store-and-forward switching and jitter performance ensured deterministic data delivery.The dual power inputs were connected to separate UPS-backed circuits.This design eliminated the sporadic network timeouts that had plagued the previous line,increasing overall equipment effectiveness(OEE)by 5%through the elimination of network-induced stoppages.

Related Product Combination Solutions

The ENTERASYS A2H254-16 P0973BK​is a key node in a larger industrial network ecosystem.It works seamlessly with these related products:

ENTERASYS C5G124-24/C5G124-48P:​Stackable chassis-based core/distribution switches.The A2H254-16​acts as an access switch,aggregating cell-level traffic and uplinking via fiber to these more powerful core switches in the control room.

Extreme Networks X440-G2 Series:​The modern successor series within Extreme’s portfolio.For new deployments,an X440-24p​might be specified,but the A2H254-16 P0973BK​remains critical for maintaining and expanding existing Enterasys-based industrial networks.

ENTERASYS A4H124-24:​A 24-port industrial switch with similar hardening.For cells requiring more than 16 copper ports,this is the logical step-up within the same trusted product family.

Various SFP Transceivers(e.g.,100FX,1000LX):​To utilize the two SFP slots for fiber uplinks.Modules like a 1000BASE-LX SFP​enable long-distance(up to 10km)single-mode fiber connections between switches in large facilities.

Industrial DIN-Rail UPS(e.g.,Phoenix Quint PS):​To provide clean,battery-backed power to the switch’s redundant DC inputs,completing a fault-tolerant power solution for the most critical nodes.

Managed Ethernet I/O Blocks(e.g.,WAGNET 8521):​These distributed I/O devices connect directly to a copper port on the A2H254-16,bringing network connectivity directly to sensors and actuators on the machine,with the switch providing managed,prioritized communication back to the PLC.

Network Management Software(Extreme Management Center):​For large installations,this software provides centralized configuration,monitoring,and firmware management for all A2H254-16​switches and other Enterasys/Extreme devices,simplifying administration.

Installation,Maintenance,and Full-Cycle Support

Installation of the ENTERASYS A2H254-16 P0973BK​is designed for industrial electricians.The compact,low-profile housing snaps directly onto a standard 35mm DIN rail inside a control panel.The removable terminal blocks for power input(and the often-included 24VDC power supply in the P0973BK kit)simplify wiring.Network cabling uses standard RJ-45 connectors.Initial configuration is typically performed via a direct connection to a laptop and the embedded web interface,where IP addresses,VLANs,QoS settings,and RSTP can be easily configured.

Routine maintenance is minimal.The primary tasks are ensuring the air vents remain clear of dust and verifying via the management interface that all ports are operating correctly and that error counters are not incrementing.The most common”maintenance”action is a firmware update,which should be performed during planned downtime to apply security patches and feature enhancements,following instructions from Extreme Networks.

We provide full-cycle support for the ENTERASYS A2H254-16 P0973BK.Every unit we supply is tested to verify all ports,switching functionality,and management access are operational.We understand the critical role this switch plays in industrial networks and offer reliable,compatible units to keep your operations running.For legacy systems,we can also advise on migration paths to current Extreme Networks industrial switches while ensuring minimal disruption.Contact us for a reliable networking solution tailored to your industrial control environment.

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