The EDS-309-3M-ST-T is a rugged unmanaged Ethernet switch offering nine total ports — six 10/100BaseT(X) RJ45 ports and three 100BaseFX multi-mode ST fiber ports — designed for mission-critical industrial applications, especially in extreme environments.

With a wide operating temperature range of -40 to 75°C, this model is ideal for use in outdoor deployments, factory automation, or any application where robust temperature resistance and stable fiber communication are essential. The fiber ports enable reliable long-distance transmission and immunity to electromagnetic interference.

A built-in relay output warns of power or port failures, enhancing system reliability. Broadcast storm protection prevents network overloads, and support for auto-negotiation, full/half duplex, and Auto MDI/MDI-X ensures easy deployment and integration into existing infrastructures.

Certified for hazardous locations (Class 1 Div. 2, ATEX Zone 2) and compliant with FCC, UL, and CE standards, this switch also features a durable metal housing and DIN rail or cabinet mounting. Each unit is 100% burn-in tested for long-term operational confidence.

Technical Specifications:

Model:

• EDS-309-3M-ST-T

Enclosure & Mounting:

• Metal enclosure
• DIN rail or distribution box mountable

Temperature Range:

• -40 to 75°C (wide temperature, -T model)

Interfaces:

• 6x 10/100BaseT(X) RJ45 ports
• 3x 100BaseFX multi-mode ST fiber ports
• Supports auto-negotiation, full/half duplex, and Auto MDI/MDI-X

Alarm Output:

• 1x relay output, 1 A @ 24 VDC
• Configurable via DIP switch (port break alarm)

Switch Properties:

• MAC table: 1,000 entries
• Packet buffer: 512 kbit
• Processing type: Store and Forward

Standards:

• IEEE 802.3 (10BaseT)
• IEEE 802.3u (100BaseT(X), 100BaseFX)
• IEEE 802.3x (Flow control)

Certifications:

• FCC
• UL
• CE
• Class 1 Division 2
• ATEX Zone 2

Key Features:

• Relay output warning for power or link failure
• Broadcast storm protection
• 100% burn-in tested for industrial reliability