General
Number of RJ45 ports	5
Number of fibre optic connections	3
IGMP Snooping
RMON

The Moxa EDS-408A-3S-SC-T is an industrial 8-port managed Ethernet switch designed for use in demanding environments such as energy supply, transportation, rail, and automation. The device features five RJ45 ports (10/100BaseT(X)) and three fiber optic connections (100BaseFX, single-mode SC), making it suitable for both wired and optical network connections. The construction takes into account extreme environmental conditions, particularly through an extended operating temperature range of -40 to 75 °C, enabling use outdoors or in industrial facilities with high thermal loads.

Applications

The switch is specifically designed for industrial networks requiring high reliability and stability. It is used in areas such as energy supply, rail transport, automation technology, and the maritime industry. Certifications according to UL 508, EN 50121-4, and NEMA TS2 highlight its suitability for critical infrastructures, where safety and electromagnetic compatibility are essential. The robust design and high MTBF of over 1,253,000 hours ensure a long service life and minimize downtime.

Functions and Features in Detail

The EDS-408A-3S-SC-T offers advanced networking functions, including VLANs (802.1Q), port-based VLANs, GVRP, and IGMP Snooping, to control and segment data traffic effectively. QoS functions allow prioritization of data streams to ensure critical applications such as control systems or video surveillance are not affected. Bandwidth management and Port Mirroring support network monitoring and diagnostics. Management is performed via various interfaces: web browser, CLI, Telnet, serial console, or via the ABC-01 module. Additionally, the switch supports protocols such as Modbus TCP and EtherNet/IP, making it particularly suitable for modern automation networks.

Technology Explained Simply

The five RJ45 ports support Auto-Negotiation, Full- and Half-Duplex mode, as well as MDI/MDI-X, enabling connection to various devices without requiring additional cable reconfiguration. The three single-mode SC fiber optic connections allow transmission over long distances, typically up to several kilometers, depending on the network environment. Redundant network architecture is supported by Turbo Ring and Turbo Chain with a recovery time of under 20 ms, as well as RSTP and STP, to quickly establish an alternative connection in case of failure. Power supply is via 9.6–60 VDC, with redundant inputs and integrated protection functions against overcurrent and reverse polarity.

Compatibility and Accessories

The switch is designed for DIN rail mounting and can optionally be wall-mounted. The IP30 protection rating of the metal housing protects against mechanical impacts and offers some protection against dust, but not against water. Certifications according to UL 508, EN 50121-4, and NEMA TS2 ensure suitability for use in industrial and transportation applications. Support for Modbus TCP and EtherNet/IP enables integration into existing automation and control systems.

Mounting and Installation

Installation is performed via the DIN rail, which is standard in many industrial enclosures. Alternatively, the switch can be wall-mounted, for which no specific mounting accessories are mentioned. Cabling is done via the RJ45 ports for wired connections and via the SC fiber optic connections for optical transmission. Power supply is via an external DC power supply in the range of 9.6 to 60 VDC, with redundant device power supply.

Operational Advantages

The high MTBF of over 1.25 million hours and certifications for critical infrastructures ensure high operational reliability. Support for redundancy protocols such as Turbo Ring and Turbo Chain ensures rapid network recovery in case of failures. Integrated security functions such as HTTPS, SSH, Port Lock, and NTP authentication enhance network security. Management via web browser, CLI, and serial console offers flexibility for configuration and maintenance. The 5-year manufacturer’s warranty underscores the reliability of the device.