General
Number of ports	16
Fibre optic port	1
Buffer size	512 kbit

The EDS-316-M-ST is an industrial unmanaged Ethernet switch from Moxa, designed for use in demanding environments. The device features a total of 16 network ports, with 15 ports implemented as RJ45 copper connections (10/100BaseT(X)) and one port as a fiber optic connection (100BaseFX, Single-Mode SC). This configuration makes the switch particularly suitable for applications requiring long transmission distances via optical fiber, for example in process automation, power supply, or transportation infrastructure. The model designation -M-ST indicates a special version approved for operation in hazardous explosive areas.

Applications

The switch is designed for use in industrial networks that require high reliability and operational safety. Certification according to Class I Div. 2 and ATEX Zone 2 allows use in areas where explosion hazards exist, for example in petrochemical or mining applications. The robust metal housing and DIN rail mounting facilitate integration into existing enclosures and industrial control systems. The high operating temperature range of -40 to 75 °C also makes the switch suitable for outdoor applications or environments with extreme temperature fluctuations.

Functions and Features in Detail

The switch supports basic networking functions such as Auto-Negotiation, Auto-MDI/MDI-X, and half- and full-duplex operation, enabling flexible and compatible integration into existing networks. Compliance with IEEE 802.3, 802.3u, and 802.3x standards ensures interoperability with other Ethernet devices. An integrated relay contact (1 A @ 24 VDC) enables alarm output in case of power failure or port disconnection. This alarm can be configured via DIP switches and supports rapid fault detection in critical systems. Additionally, the switch includes Broadcast Storm Protection to safeguard the network against excessive data transmissions.

Technology Explained Simply

Data processing is performed using the Store-and-Forward method, where complete data packets are received, checked, and then forwarded. This ensures high data integrity, especially in environments with heavy data traffic. The MAC table with 1,000 entries enables efficient addressing of connected devices, while the 512 kbit buffer ensures stable data transmission. The fiber optic interface in Single-Mode format (SC connector) enables transmission distances of several kilometers, which is advantageous for networking distributed installations. The metal housing construction provides mechanical stability and protection against electromagnetic interference.

Compatibility and Accessories

The switch is compatible with standard Ethernet networks and can be directly integrated into existing infrastructures. As an unmanaged device, it requires no additional configuration or network management. The source mentions the EDS-316 model as an alternative, which also offers 16 ports but features only copper connections (10/100BaseT(X)). This model is suitable for applications where fiber optic connections are not required.

Mounting and Installation

Mounting is done via DIN rail or directly in the enclosure. The robust metal construction and DIN rail mounting simplify installation in industrial environments. The 100 % Burn-In test performed during manufacturing ensures high reliability and minimizes the likelihood of early failures.

Operational Advantages

The EDS-316-M-ST offers high operational safety through the integrated alarm indication for power or connection loss. Certification for hazardous explosive areas significantly expands the range of applications. The robust construction and extended temperature range ensure long service life even under harsh operating conditions. The combination of copper and fiber optic ports enables flexible network design, allowing critical connections to be implemented via fiber optic while standard connections use copper.