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Moxa EDS-205A 5-Port Industrial Ethernet Switch with Redundant Power for Harsh Environments

Q: What environments and applications is the EDS-205A designed for?

The EDS-205A targets harsh industrial environments including marine vessels, railway wayside installations, roadside ITS equipment, hazardous locations (oil/gas facilities), and factory floors. It handles extreme temperatures (-40°C to 75°C in -T models), shock, vibration, and electromagnetic interference. The ruggedized design and multiple industry certifications make it suitable where commercial-grade switches would fail.

Q: How do I choose between the standard EDS-205A and the wide-temperature -T models?

Select standard models for climate-controlled industrial spaces or moderate outdoor installations (-10°C to 60°C range). Choose -T models for extreme cold environments like outdoor rail enclosures, unheated wayside cabinets, or Arctic/desert deployments requiring -40°C to 75°C operation. The -T models carry identical port configurations and certifications with extended thermal rating.

Q: Is the EDS-205A worth the investment compared to managed industrial switches?

The EDS-205A provides excellent value for networks requiring environmental ruggedness and certifications but not remote management features. You eliminate the cost and complexity of switch configuration software while gaining the same industrial-grade hardware, redundant power, and compliance approvals. For small networks or field locations without IT staff access, the unmanaged design reduces deployment time and removes security vulnerabilities associated with management interfaces.

Q: What systems and protocols does the EDS-205A work with?

The EDS-205A operates as a transparent Layer 2 switch compatible with any Ethernet-based protocol including Modbus TCP, EtherNet/IP, PROFINET (CC-A certified on hardware v3.0.0+), BACnet/IP, and standard TCP/IP. It supports both 10BASE-T and 100BASE-TX devices simultaneously through auto-negotiation. The fiber models (M-SC, M-ST, S-SC variants) enable long-distance uplinks to core switches or connection to existing fiber infrastructure.

Q: How do I wire the redundant power inputs on the EDS-205A?

Connect two independent DC power sources (12V, 24V, or 48V systems within 9.6-60 VDC range) to the 4-position terminal block. The switch automatically draws from both inputs and maintains operation if one source fails. Reverse polarity protection prevents damage from miswiring. You can also connect to 18-30 VAC supplies within 47-63 Hz frequency range for AC power installations.

Q: What do the DIP switches on the EDS-205A control?

The DIP switches enable or disable broadcast storm protection to prevent network flooding from defective devices or loops. Additional switches control QoS (Quality of Service) prioritization for time-sensitive traffic. Settings take effect immediately without power cycling. The Quick Installation Guide provides specific DIP switch position diagrams for each feature combination.

Q: Can I mount the EDS-205A vertically or must it be horizontal?

The EDS-205A supports standard DIN-rail mounting in any orientation including vertical, horizontal, or inverted positions. Optional wall-mount kits are available separately for installations without DIN rail. The compact 30 × 115 × 70 mm aluminum housing allows mounting in tight spaces. Ensure adequate ventilation clearance around the unit when planning cabinet layout.

Q: How do the fiber models (M-SC, M-ST, S-SC) differ from the all-copper EDS-205A?

Fiber models replace one RJ45 port with a 100BASE-FX fiber port, providing four copper ports plus one fiber uplink. M-SC and M-ST use multimode fiber (SC or ST connectors) for distances up to 2 km. S-SC uses single-mode fiber (SC connector) for distances up to 15-40 km depending on fiber quality. Choose based on your uplink distance and existing fiber infrastructure connector type.

Brand Moxa

Model Number EDS-205A

UPC N/A

Manufacture Warranty

EpicRise Warranty 1 Year

Product Highlights

• 5-port Fast Ethernet switching with store-and-forward architecture and 1 Gbps switching fabric for reliable industrial networking

• Redundant 12/24/48 VDC power inputs (9.6-60 VDC range) with reverse polarity protection ensure continuous uptime in critical applications

• Extended temperature models (-40°C to 75°C) and ruggedized aluminum IP30 housing withstand extreme industrial conditions

• Multiple certifications for marine (DNV/LR/ABS/NK), rail (EN 50121-4), and hazardous locations (Class I Div. 2, ATEX, IECEx)

• MTBF exceeding 3 million hours with 100% burn-in testing and DIN-rail mounting for easy field deployment

Overview
Specifications
FAQ
User Guides
Reviews

The Moxa EDS-205A Series delivers reliable Layer 2 Ethernet connectivity for industrial control networks operating in harsh environments. This unmanaged switch provides 5 Fast Ethernet ports with auto-negotiation and auto MDI/MDI-X, eliminating manual configuration while ensuring plug-and-play deployment in factory automation, transportation infrastructure, and process control installations.

Designed for mission-critical applications where network downtime translates to operational losses, the EDS-205A features redundant DC power inputs that automatically failover between two independent power sources. The compact DIN-rail form factor and wide operating voltage range (9.6-60 VDC) simplify integration into existing control panels and fieldbus cabinets.

Available in standard (-10°C to 60°C) and wide-temperature (-40°C to 75°C) variants, with copper-only or fiber uplink configurations to match your network topology and distance requirements.

Best For

The EDS-205A serves industrial networking applications where environmental extremes, safety compliance, or constant vibration demand purpose-built Ethernet infrastructure:

- Marine and offshore installations requiring DNV, LR, ABS, or NK type approvals for shipboard Ethernet networks connecting navigation systems, engine monitoring, and SCADA equipment

- Railway wayside applications such as trackside signal control, platform surveillance networks, and station automation systems meeting EN 50121-4 electromagnetic compatibility requirements

- Hazardous area networking in oil and gas facilities, chemical plants, and refineries where Class I Division 2, ATEX Zone 2, or IECEx certification is mandatory

- Intelligent Transportation Systems (ITS) including traffic signal controllers, variable message signs, and roadside monitoring equipment complying with NEMA TS2 specifications

- Factory automation networks connecting PLCs, HMIs, and I/O modules in manufacturing environments with extreme temperatures or exposure to electrical noise

Key Features

- Five 10/100BASE-TX auto-negotiating Ethernet ports with automatic MDI/MDI-X crossover detection eliminate the need for crossover cables

- Store-and-forward switching architecture with 512 Kbit packet buffer and 1K MAC address table ensures reliable data delivery in broadcast-heavy networks

- Redundant dual DC power inputs with automatic failover, reverse polarity protection, and 1.1A overcurrent protection prevent single-point power failures

- DIP switch controls for broadcast storm protection and QoS prioritization allow field configuration without software tools

- PROFINET Conformance Class A (CC-A) compliance on hardware version 3.0.0 and later enables integration into Siemens automation networks

- LED indicators for power status and per-port link/activity provide at-a-glance diagnostics for troubleshooting

- Compact 30 x 115 x 70 mm aluminum housing with IP30 rating fits standard DIN-rail mounts in crowded control cabinets

- Wide operating voltage range (9.6-60 VDC) accommodates 12V, 24V, and 48V industrial power systems with single part number

Quick Specs

Ethernet Ports	5 × 10/100BASE-TX (RJ45) or 4 × RJ45 + 1 × 100BASE-FX fiber (SC/ST, multimode/single-mode)
Switching Performance	1 Gbps switching fabric, 0.74 Mpps forwarding rate, 1K MAC address table
Power Input	Redundant dual inputs: 12/24/48 VDC (9.6-60 VDC) or 18-30 VAC (47-63 Hz), < 3W consumption
Operating Temperature	Standard models: -10°C to 60°C; Wide-temp (-T) models: -40°C to 75°C
Humidity Tolerance	5% to 95% RH (non-condensing)
Shock & Vibration	IEC 60068-2-27 (shock), IEC 60068-2-6 (vibration), IEC 60068-2-31 (free fall)
Electromagnetic Immunity	IEC 61000-4-2 (ESD: ±6kV contact), IEC 61000-4-4 (EFT: 2kV power), IEC 61000-4-5 (Surge: 2kV)
Housing & Mounting	Aluminum, IP30 protection, DIN-rail or wall mount, 175g weight
MTBF	3,316,504 hours (copper models), 3,045,679 hours (fiber models) per Telcordia standards
Available Models	EDS-205A (5×RJ45), EDS-205A-T (5×RJ45 wide-temp), EDS-205A-M-SC/ST (4×RJ45+1×MM fiber), EDS-205A-S-SC (4×RJ45+1×SM fiber), all with -T wide-temp variants

What's Included

- 1 × EDS-205A Series Ethernet switch (model-specific port configuration)

- 1 × Quick Installation Guide

Product Details
Color	Green
Connection Type	Ethernet
Power Source	DC-powered

What environments and applications is the EDS-205A designed for?

The EDS-205A targets harsh industrial environments including marine vessels, railway wayside installations, roadside ITS equipment, hazardous locations (oil/gas facilities), and factory floors. It handles extreme temperatures (-40°C to 75°C in -T models), shock, vibration, and electromagnetic interference. The ruggedized design and multiple industry certifications make it suitable where commercial-grade switches would fail.

How do I choose between the standard EDS-205A and the wide-temperature -T models?

Select standard models for climate-controlled industrial spaces or moderate outdoor installations (-10°C to 60°C range). Choose -T models for extreme cold environments like outdoor rail enclosures, unheated wayside cabinets, or Arctic/desert deployments requiring -40°C to 75°C operation. The -T models carry identical port configurations and certifications with extended thermal rating.

Is the EDS-205A worth the investment compared to managed industrial switches?

The EDS-205A provides excellent value for networks requiring environmental ruggedness and certifications but not remote management features. You eliminate the cost and complexity of switch configuration software while gaining the same industrial-grade hardware, redundant power, and compliance approvals. For small networks or field locations without IT staff access, the unmanaged design reduces deployment time and removes security vulnerabilities associated with management interfaces.

What systems and protocols does the EDS-205A work with?

The EDS-205A operates as a transparent Layer 2 switch compatible with any Ethernet-based protocol including Modbus TCP, EtherNet/IP, PROFINET (CC-A certified on hardware v3.0.0+), BACnet/IP, and standard TCP/IP. It supports both 10BASE-T and 100BASE-TX devices simultaneously through auto-negotiation. The fiber models (M-SC, M-ST, S-SC variants) enable long-distance uplinks to core switches or connection to existing fiber infrastructure.

How do I wire the redundant power inputs on the EDS-205A?

Connect two independent DC power sources (12V, 24V, or 48V systems within 9.6-60 VDC range) to the 4-position terminal block. The switch automatically draws from both inputs and maintains operation if one source fails. Reverse polarity protection prevents damage from miswiring. You can also connect to 18-30 VAC supplies within 47-63 Hz frequency range for AC power installations.

What do the DIP switches on the EDS-205A control?

The DIP switches enable or disable broadcast storm protection to prevent network flooding from defective devices or loops. Additional switches control QoS (Quality of Service) prioritization for time-sensitive traffic. Settings take effect immediately without power cycling. The Quick Installation Guide provides specific DIP switch position diagrams for each feature combination.

Can I mount the EDS-205A vertically or must it be horizontal?

The EDS-205A supports standard DIN-rail mounting in any orientation including vertical, horizontal, or inverted positions. Optional wall-mount kits are available separately for installations without DIN rail. The compact 30 × 115 × 70 mm aluminum housing allows mounting in tight spaces. Ensure adequate ventilation clearance around the unit when planning cabinet layout.

How do the fiber models (M-SC, M-ST, S-SC) differ from the all-copper EDS-205A?

Fiber models replace one RJ45 port with a 100BASE-FX fiber port, providing four copper ports plus one fiber uplink. M-SC and M-ST use multimode fiber (SC or ST connectors) for distances up to 2 km. S-SC uses single-mode fiber (SC connector) for distances up to 15-40 km depending on fiber quality. Choose based on your uplink distance and existing fiber infrastructure connector type.