Industrial Gigabit Ethernet Switch 4G+4 SFP -40°C to 80°C DIN-Rail Mounted

Industrial Gigabit Ethernet Switch 4G+4 SFP -40°C to 80°C DIN-Rail Mounted

Product Overview:

The LNK-GY404G-SFP Industrial Ethernet Switch delivers high-performance networking with 4× Gigabit Ethernet ports and 4× 1000BASE-X SFP slots, designed for mission-critical industrial applications. This rugged switch ensures ultra-reliable connectivity with advanced network redundancy and cybersecurity protection.

Key Features & Benefits

✅ Hybrid Copper-Fiber Connectivity

• 4× 10/100/1000BASE-T RJ45 ports for flexible device connections

• 4× 1000BASE-SFP slots support single-mode/multi-mode fiber (up to 120km)

• Enables mixed-media networks with copper-to-fiber conversion

✅ Ultra-Fast Network Redundancy (<20ms)

• Proprietary ring redundancy protocol ensures failover recovery in <20ms

• Prevents network downtime in industrial automation, power grids, and transportation systems

• Supports STP/RSTP/MSTP for multi-layer network resilience

✅ Industrial-Grade Reliability

• -40°C to 75°C operating range for harsh environments (factories, outdoor cabinets)

• Dual 12~48VDC power inputs with surge protection (6kV)

• DIN-rail or wall-mountable for space-saving deployment

✅ Advanced Network Security & Management

• VLAN, QoS, and IGMP snooping optimize bandwidth for real-time data

• Port-based ACL & DoS protection prevent cyber threats

• LLDP & SNMP support for remote monitoring & troubleshooting

Applications

✔ Smart Factory Automation – Connects PLCs, HMIs, and industrial robots
✔ Railway & Traffic Control – Ensures ultra-reliable signaling networks
✔ Renewable Energy Systems – Provides fiber-optic backhaul for solar/wind farms
✔ Oil & Gas Monitoring – Withstands extreme temperatures in remote sites

Product Features:

1. High-Speed Hybrid Connectivity

• 4× Gigabit Copper Ports (10/100/1000BASE-T): Enable flexible device connections for PLCs, HMIs, and IP cameras

• 4× 1000BASE-X SFP Slots: Support hot-swappable single-mode/multi-mode fiber modules (up to 120km)

• Auto MDI/MDIX & Auto-Negotiation: Simplifies plug-and-play installation without manual configuration

2. Industrial-Grade Reliability

• Extended Temperature Range (-40°C to 80°C): Operates reliably in harsh environments (factories, oil fields, outdoor cabinets)

• IP40 Protection & Aluminum Alloy Housing: Resists dust, vibration, and EMI interference

• DIN-Rail or Wall-Mountable: Compact design for space-constrained industrial panels

3. Advanced Network Standards Compliance

• IEEE 802.3/u/x Compliance: Ensures interoperability with industrial Ethernet devices

• Full/Half-Duplex Auto-Sensing: Optimizes bandwidth efficiency for real-time data

• Flow Control (802.3x): Prevents data loss in high-traffic networks

4. Smart Fiber Expansion

• Hot-Swappable SFP Modules: Allow flexible fiber upgrades (1000BASE-SX/LX/LH)

• Future-Proof Backbone Links: Ideal for long-distance fiber-optic networks in smart grids and transportation systems

Application Scenarios

1. Industrial Automation Networks

• Provides reliable Gigabit Ethernet backbone for smart factory environments

• Connects PLCs, HMIs, and industrial robots with <20ms redundancy switching

• Supports real-time control protocols (PROFINET, EtherCAT) in automotive/electronics production lines

2. Critical Infrastructure Communications

• Enables ultra-reliable networking for power substations (IEC 61850-3 compliant)

• Facilitates SCADA system integration in oil/gas pipelines and water treatment plants

• Withstands extreme temperatures (-40°C to 80°C) in mining and metallurgy operations

3. Transportation Systems

• Implements railway signaling networks with mission-critical redundancy

• Powers tunnel surveillance systems through hybrid copper-fiber connectivity

• Meets EN 50155 standards for rolling stock applications

4. Smart Grid Deployments

• Forms fiber-optic backbone for renewable energy plants (solar/wind farms)

• Enables distributed energy resource management with precise time synchronization

• Provides cyber-secure communication for smart meter data aggregation

5. Outdoor Harsh Environment Applications

• Deploys in traffic control cabinets with IP40 protection

• Supports long-distance fiber links (up to 120km) for border security systems

• Resists vibration and EMI in maritime and offshore installations

Technical Indexes

Application Display Diagram

Established in 2001 & headquartered in Shenzhen, E-link China Technology Co., Ltd. (E-link) is a leading manufacturer of fiber optic communication and video transmission products in China.

Our main products include:

• Fiber Media Converters
• Industrial Ethernet PoE switchs
•  PoE Injectors & Splitters
• PoE Extenders
• Serial Fiber Converters
• SFP Transceivers
• HDMI Fiber Converters
• DVI Fiber Converters
• HD/3G/6G/12G Fiber Extenders
• CCTV Fiber Optic Converters
• HDMI/ DVI/ VGA/ SDI Ethernet Extenders

With rich experience in providing high quality products in the
telecom and CCTV business, E-link has a large manufacturing factory
in Shenzhen, able to provide cost-effective solutions 

to serve our customers successfully.



   

   

                                                                   
                                                                  
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Since the launch of our products in domestic and international
markets, we have won a good reputation for our high-quality
products and sincere services. Our products are widely applied to

• System of Telecom
• Public Security
• Bank
• Smart City
• Public transportation
• New Energy Developing
• CCTV Monitoring Transmission

We also provide ODM & OEM services and we have cooperated with some famous companies all
over the world. Our own brand "E-link" is also well known in many countries and have distributors there.





   





















































                                                                   
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E-Link quality:

• ISO9001 Quality System
• CE, RoHS, FCC certified 
• 48 hours of weathering test before delivery
• Conduct full-spectrum environmental and electrical testing on all product designs

   





Our knowledgeable sales, technical support and engineering
personnel are dedicated to understanding your needs and designing
products and solutions to meet your needs. We would be happy to
provide you with the best price, quality products and fast
delivery.