General
Number of RJ45 ports	6
Fibre optic connector	ST
Auto-negotiation
Auto-MDI/MDI-X

The EDS-308-T from Moxa is an industrial unmanaged Ethernet switch designed for use in demanding environments such as factory halls, power plants, or outdoor applications. The device features eight network ports, consisting of six 10/100BaseT(X) RJ45 copper ports and two 100BaseFX Multi-Mode ST fiber optic ports. This combination enables a flexible network architecture with high reach and immunity to electromagnetic interference, which is crucial for industrial applications. The fiber optic ports are equipped with ST connectors, ensuring a secure and reliable connection in critical environments.

Applications

The switch is specifically designed for industrial environments where high mechanical stress, extreme temperatures, or hazardous explosive areas prevail. It is suitable for outdoor use, as it features an extended operating temperature range of -40 to 75 °C. Certification for hazardous areas according to Class 1 Division 2 and ATEX Zone 2 makes it suitable for applications in the oil and gas industry or chemical industry. The robust construction with a metal housing protects internal components from mechanical impacts and environmental influences.

Features and Equipment in Detail

The EDS-308-T offers an integrated relay output function that activates in case of power failure or port disconnection. This relay contact (1 A @ 24 VDC) can be connected to external alarm systems or controls to detect network disruptions and initiate appropriate actions. Additionally, the Broadcast Storm Protection safeguards the network against overloads caused by faulty or uncontrolled data packets that could lead to network disruptions. The ports support Auto-Negotiation, half- and full-duplex mode, as well as Auto-MDI/MDI-X, simplifying installation and configuration.

Technology Explained Simply

The fiber optic ports enable data transmission over long distances without signal loss, which is particularly beneficial in large production facilities or across multiple buildings. The copper ports (RJ45) are suitable for short to medium connections within a building or machine. The combination of both technologies offers flexibility in network planning. The operating temperature range of -40 to 75 °C makes the switch independent of climatic conditions, making it suitable for use in cold or hot regions. Certifications according to FCC, UL, and CE ensure compliance with international safety and performance standards.

Compatibility and Accessories

The switch is designed for mounting on a DIN rail, enabling easy integration into existing distribution enclosures. The use of standard RJ45 and ST connectors ensures compatibility with common network cables and fiber optic cables. The integrated relay output function can be connected to external monitoring systems to detect network disruptions.

Mounting and Installation

Mounting is done via a DIN rail installed in standard distribution enclosures. The robust metal housing is compact and allows space-saving installation. The connections are clearly labeled, and integrated functions such as Auto-Negotiation and Auto-MDI/MDI-X reduce the need for manual settings. Installation requires no special software or configuration, as it is an unmanaged switch.

Advantages in Operation

The EDS-308-T offers high reliability through the 100%-burn-in test, which all devices undergo before shipment. This increases service life and minimizes downtime. The integrated alarm output function enables proactive network monitoring, and the Broadcast Storm Protection safeguards the network against disruptions. Certification for hazardous areas expands the application range in critical industrial applications. The combination of fiber optic and copper ports offers flexibility in network planning without requiring additional devices.