Description

The ENTERASY A4H254-8F8T is an industrial-grade 8-port managed Ethernet switch engineered for robust connectivity in harsh automation environments. Manufactured by ENTERASY, this compact switch integrates advanced Layer 2 management features with PoE+ (Power over Ethernet) support, delivering data and power (up to 30W per port) over a single cable. Designed for DIN-rail mounting, the ENTERASY A4H254-8F8T operates across industrial temperature ranges (-40°C to 75°C) and features redundant dual power inputs (24V DC) for mission-critical applications. Its hardened metal housing (IP40 protection) resists electromagnetic interference, vibrations, and dust, ensuring uninterrupted communication between PLCs, HMIs, sensors, and cameras.

As a cornerstone of Industrial IoT (IIoT) infrastructure, the ENTERASY A4H254-8F8T enables real-time data exchange for predictive maintenance and centralized control. It supports IEEE 802.3at/af PoE+, IGMP snooping for multicast traffic optimization, and VLAN segmentation to isolate critical traffic. The ENTERASY A4H254-8F8T also includes QoS prioritization, storm control, and port mirroring for network diagnostics, making it indispensable for smart factories and infrastructure projects requiring deterministic performance.

ENTERASY A4H254-8F8T

Technical Specifications

Parameter Name	Parameter Value
Product Model	ENTERASY A4H254-8F8T
Manufacturer	ENTERASY
Product Type	Managed Industrial Ethernet Switch
Port Configuration	8 × 10/100Base-T(X) RJ45 (PoE+)
PoE Standard	IEEE 802.3at/af (30W max/port)
Total PoE Budget	240W
Switching Capacity	1.6 Gbps
Power Input	24V DC dual redundant (18–36V range)
Operating Temperature	-40°C to +75°C
Protection Rating	IP40 (housing), DIN-rail mountable
Layer 2 Features	VLAN, QoS, IGMP Snooping, Port Mirroring
Dimensions	135 × 105 × 55 mm
Weight	0.8 kg
Certifications	CE, FCC, UL 61010-2-201

Main Features and Advantages

Extended environmental resilience: The ENTERASY A4H254-8F8T operates reliably in extreme temperatures and high-vibration settings like steel mills or outdoor substations. Its dual power inputs with reverse-polarity protection eliminate single-point failures, while 6 kV surge immunity on Ethernet ports guards against lightning strikes.

Advanced network management: This switch prioritizes critical control traffic using QoS (IEEE 802.1p/DSCP), ensuring latency-sensitive PLC communications take precedence. With VLAN support, engineers segment OT/IT networks for enhanced security. The ENTERASY A4H254-8F8T simplifies deployment via web-based management, CLI, or SNMPv3, and its PoE auto-detection prevents damage to non-PoE devices.

Cost efficiency: Integrating power and data transmission reduces cabling expenses by 50% for IP cameras, wireless APs, and remote I/O modules. The ENTERASY A4H254-8F8T also features energy-saving modes, deactivating unused ports.

Application Field

The ENTERASY A4H254-8F8T is deployed in intelligent transportation systems, where it powers roadside cameras and vehicle detectors while withstanding temperature swings and humidity. In manufacturing, it connects robotic cells and vision inspection systems, using VLANs to isolate safety PLC networks from data-collection traffic.

For renewable energy, the ENTERASY A4H254-8F8T manages communication in solar/wind farms, linking inverters and environmental sensors across distributed sites. Water treatment plants utilize its PoE+ capability to operate pH meters and flow sensors in corrosive environments. The ENTERASY A4H254-8F8T also anchors building automation networks, supporting access control and HVAC systems with millisecond-level deterministic performance.

Related Products

ENTERASY A4H124-5F2T: 5-port unmanaged switch with 2 fiber uplinks.

ENTERASY A8H512-16F16T: 16-port PoE++ switch (60W/port) for high-power devices.

ENTERASY M320G-24SFP: Layer 3 gigabit switch with 24 SFP slots.

ENTERASY PSD-240-24: 24V/10A redundant power supply for switch integration.

ENTERASY FMC-1000: Media converter for copper-to-fiber conversion.

ENTERASY R300G-4G: Industrial cellular gateway for remote site connectivity.

ENTERASY A4H254-8F8T

Installation and Maintenance

Pre-installation preparation: Verify voltage compatibility (18–36V DC) and secure DIN-rail mounting (TS-35) in a well-ventilated area. Ensure PoE load calculations do not exceed 240W total. Use shielded Ethernet cables (Cat5e+) for noise immunity.

Maintenance recommendations: Monitor PoE utilization via SNMP to prevent overload. Clean air vents annually to avoid thermal shutdown. For firmware updates, use ENTERASY’s NMS software to ensure feature enhancements. Replace the ENTERASY A4H254-8F8T if ports show physical damage or persistent packet loss.