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The GE IS420ESWBH3A is a robust industrial Ethernet IONet switch module engineered by General Electric (GE) for real‑time network communication within demanding automation environments. Specifically designed for Mark VIe and Mark VIeS control architectures, this unmanaged switch serves as the backbone of Ethernet‑based I/O networks, enabling reliable data transmission among controllers, I/O modules, and supervisory systems. Its rugged build, wide operating range, and high port count make it essential for power generation, turbine controls, and other mission‑critical industrial applications where network uptime and deterministic performance are paramount.

Technical Specifications

Specification	Details
Brand	GE (General Electric)
Model	IS420ESWBH3A
Module Type	Industrial Ethernet IONet Switch
System Compatibility	Mark VIe / Mark VIeS Speedtronic control systems
Ethernet Ports	16 × 10/100 Base‑TX RJ45 copper ports
Fiber Ports	None (copper‑only model)
Ethernet Standards	IEEE 802.3, 802.3u, 802.3x
Auto‑Negotiation	Full/Half Duplex, HP‑MDIX support
Buffer Memory	≥ 256 KB
MAC Address Table	~4 000 entries
Power Supply	24–28 VDC with redundant inputs
Operating Temperature	‑40 °C to +70 °C
Humidity	5 %–95 % RH (non‑condensing)
Mounting	DIN‑rail or panel mount
Dimensions (approx.)	188 mm × 86 mm × 56 mm
Weight (approx.)	1.2 kg
LED Indicators	Link, activity, duplex, speed, power
Cooling Method	Fanless / convection

This switch is optimized for high‑availability industrial networks utilizing GE’s IONet protocol and real‑time control traffic.

Recommended Related Models

To build a complete and scalable automation network, consider these GE modules:

GE IS420ESWBH1A – 16‑port switch with single fiber uplink option
GE IS420ESWAH1A – 8‑port Ethernet switch with fiber support
GE IS420ESWBH2A – Dual fiber uplink version with higher redundancy
GE IS420UCSBH1A – Mark VIe controller module

These components work seamlessly within GE control architectures to expand network reach and reliability.

Popular Allen Bradley Models (For Reference)

Professionals familiar with Allen‑Bradley platforms may compare these analogous components:

Allen‑Bradley 1783‑ETAPND8 – 8‑port unmanaged EtherNet/IP adapter
Allen‑Bradley 1783‑AW6T – Managed industrial Ethernet switch
Allen‑Bradley 1756‑EN2T – ControlLogix EtherNet/IP communication module
Allen‑Bradley 1756‑RLY – Remote I/O link and communications module

While ecosystems differ, these devices serve similar network communication roles in Rockwell Automation systems.

Applications

The GE IS420ESWBH3A switch plays a vital role in:

High‑density I/O network hubs for Mark VIe/VIeS control systems
Real‑time data exchange among controllers, I/O modules, and HMIs
Control networks in power generation plants (gas, steam, hydro)
Distributed Ethernet backbones in industrial automation
Process control systems requiring rugged, deterministic communication
Large‑scale manufacturing and mission‑critical operations

Its unmanaged, plug‑and‑play design simplifies deployment in complex control environments.

Advantages

High Port Density: Sixteen copper Ethernet ports allow extensive device connectivity.
Industrial‑Grade Durability: Wide temperature and humidity tolerances ensure stable operation in harsh environments.
Redundant Power Inputs: Dual power options increase system availability and protect against supply failure.
Easy Diagnostics: Front‑panel LEDs provide clear status feedback for link presence, activity, and speed.
Fanless Cooling: Convection‑cooled design enhances reliability and reduces maintenance.
Plug‑and‑Play Unmanaged Design: No complex configuration required — ideal for control network deployment.

Technical FAQs

What is GE IS420ESWBH3A?
A rugged industrial Ethernet IONet switch designed for GE Mark VIe and VIeS control systems.
How many Ethernet ports does it provide?
It includes 16 copper 10/100 Base‑TX RJ45 ports.
Does this model support fiber ports?
No — the H3A version is copper‑only.
What temperature range can it operate in?
Roughly ‑40 °C to +70 °C — suitable for harsh industrial environments.
What power supply does it require?
24–28 VDC with support for redundant inputs.
Is configuration required before use?
No — it is an unmanaged switch with plug‑and‑play operation.
Are status LEDs included?
Yes — LEDs indicate link, activity, duplex, speed, and power status.
What mounting options are available?
DIN‑rail or panel mount configurations.
Is it compatible with other PLC/DCS systems?
Primarily optimized for GE control systems but can interface with standard Ethernet devices.
What industrial standards does it support?
Compliance with IEEE Ethernet standards ensures reliable network communication.