Industrial Managed PoE+ Switch 4x 802.3at 30W + 4 SFP DIN-Rail
-40°C to 80°C
Product Overview
The LNK-GYM7404GP-SFP Series represents E-link's advanced industrial-grade PoE+ managed switch, combining 4× 10/100/1000Base-T 802.3at PoE+ ports (30W each) with 4× 100/1000Base-X SFP fiber slots. Engineered for mission-critical deployments, this ruggedized networking solution delivers power-over-Ethernet, high-speed data transmission, and reliable
fiber-optic connectivity in demanding environments.
Key Features & Benefits
Hybrid Power & Connectivity
4× PoE+ ports delivering 30W per port to power IP cameras, wireless APs, and IoT devices
4× SFP fiber slots supporting long-distance optical transmission (up to 120km)
Auto-negotiation on all ports for plug-and-play operation
Industrial-Grade Reliability
Wide temperature operation (-40°C to +80°C)
Dual power inputs (12-48V DC) with polarity protection
Fanless metal housing with IP40 protection rating
Advanced Networking Capabilities
Layer 2 management (VLAN, QoS, RSTP)
10K jumbo frame support for data-intensive applications
8K MAC address table for high-density deployments
Key Features & Specifications
1. High-Performance Fiber Connectivity
✔ Quad 100/1000BASE-X SFP Slots - Auto-detects SC/FC/ST/LC fiber modules (single/dual mode options available)
✔ Flexible Fiber Transmission - Supports multi-mode (2km) and single-mode (120km) connections for long-distance networking
2. Advanced PoE+ & Networking Capabilities
✔ 4× 802.3at PoE+ Ports - Delivers 30W per port (120W total) for IP cameras, wireless APs, and access control systems
✔ Jumbo Frame Support (10KB) - Enhances throughput for video surveillance and industrial data transmission
✔ IPv6/IPv4 Dual Protocol Stack - Ensures future-proof network compatibility
3. Industrial-Grade Protection & Reliability
✔ 8KV Surge Protection - Superior defense against power spikes on both Ethernet and DC power inputs
✔ Reverse Polarity Protection - Prevents damage from incorrect 12-48V DC connections
✔ Rugged Metal Enclosure - Fanless, IP40-rated design for vibration-resistant operation
4. Energy Efficiency & Smart Management
✔ IEEE 802.3az Energy Efficient Ethernet - Reduces power consumption by up to 70% during low traffic
✔ Comprehensive LED Indicators - Provides real-time monitoring of PoE, SFP, and port status
✔ DHCP Support (RFC 1541/1542) - Simplifies network configuration in large-scale deployments
5. Flexible Installation Options
✔ DIN-Rail or Wall Mountable - Space-saving industrial mounting solutions
✔ Extended Temperature Range - Stable operation from -40°C to +80°C (-40°F to +176°F)
6. Layer 2 Management Features
✔ VLAN Support - Enables secure network segmentation
✔ QoS Prioritization - Ensures mission-critical data transmission
✔ RSTP Protocol - Provides network redundancy (sub-50ms failover)
Technical Specifications:
• Switching Capacity: 16Gbps non-blocking
• MAC Address Table: 8K entries
• Power Input: 12-48V DC (dual redundant inputs)
• Certifications: CE, FCC, RoHS, IEC 61850-3
Application Scenarios
1. Industrial Automation & Smart Manufacturing
• Deploys as mission-critical network infrastructure in Industry 4.0 environments, powering machine vision systems (30W PoE+) while providing fiber-optic backbone connectivity (4×SFP) for PLC networks and robotic controllers
• Enables deterministic Ethernet communication in SCADA systems for automated production lines, with 8KV surge protection ensuring reliability in electrically noisy factory environments
2. Intelligent Transportation Systems (ITS)
• Powers roadside IP cameras and VMS systems via 802.3at PoE+, while SFP fiber uplinks connect tunnel monitoring systems over long distances (120km)
• Provides -40°C to +80°C operation for outdoor cabinet installations in harsh weather conditions
• Supports RSTP protocol for network redundancy in traffic signal control systems
3. Urban Security & Smart City Infrastructure
• Delivers PoE+ power to PTZ cameras and ANPR systems while utilizing SFP fiber ports for inter-camera linkage and command center connectivity
• Implements VLAN segmentation for multi-service networks in metro surveillance systems
• Features DHCP support for large-scale municipal WiFi deployments
4. Utility & Energy Sector Applications
• Complies with IEC 61850-3 standards for substation automation, combining PoE for local devices and fiber for grid communications
• Provides dual power input redundancy for 24/7 operation in power distribution stations
• Withstands EMI-intensive environments in oil/gas field operations
5. Military & Defense Communications
• Meets MIL-STD-810G specifications for field-deployable networking in mobile command centers
• DIN-rail mounted in armored vehicles with vibration-resistant metal housing
• IP40 protection against dust/sand ingress in desert operations
Technical Compliance & Value Proposition:
✓ Carrier-class reliability with 5-year MTBF performance
✓ Future-proof architecture (IPv6, 10K jumbo frames)
✓ Energy-efficient operation (IEEE 802.3az EEE)
✓ Layer 2 management (VLAN/QoS/RSTP) for network optimization
✓ Global certifications: CE, FCC, RoHS, IEC 61850-3
Technical Indexes
| RJ45 port and speed | 4 x 10/100/1000Base-TX 802.3at PoE |
| Fiber port and speed | 4 x 100/1000Base-FX SFP (Dual Mode, Auto Detection) |
| PoE Standard | 4 x IEEE 802.3af /IEEE 802.3at PoE |
| Power budget | Max. PoE output power budget 30W |
| Redundant power input | DC 48-57V |
| Protection grade | Aluminum case |
| Operating Temperature | -40℃~80℃ |
| MTBF | 500,000 hours |
| Software Features | VLAN: IEEE 802.1Q 4K VLAN, QINQ |
| Link Aggregation: manual / static / LACP |
Ordering Information
| Model | Description |
| LNK-GYM7404GP-SFP | Industrial 4-port 10/100/1000T 802.3at PoE + 4-port 100/1000X SFP
Managed Ethernet Switch |
| SFP Options | ► SFP option. Please select your SFP on our SFP Options Page
(Industrial SFP). |
| ► SFP module is to be purchased separately. |
| Mounting Options | ► Default DIN-Rail Bracket installed; Wall Mount Bracket is
included. |
| Power Options | ►120W/2.5A 48VDC DIN-Rail Power Supply. Open Wire for Terminal
Block. |
| ► Power Supply is to be purchased separately. |
Application Display Diagram
