Moxa EDS-308-MM-SC Industrial Multi-mode Fiber Network Switch

The Moxa EDS-308-MM-SC is a robust industrial multi-mode fiber network switch engineered for reliable data communication in demanding environments. This unmanaged, hardened Ethernet switch boasts several key advantages, including its support for dual power inputs, ensuring operational continuity. Its core features include 8 multi-mode fiber ports with SC connectors, enabling extended network reach and immunity to electromagnetic interference. Technically, the EDS-308-MM-SC operates within a wide temperature range of -40 to 75°C, and features a 12/24/48 VDC (9.6 to 60 VDC) power input, making it suitable for diverse industrial applications.

Product Specifications

| Feature                | Specification                                     |

| :--------------------- | :------------------------------------------------ |

| Ethernet Ports         | 8 x multi-mode fiber ports (SC connectors)        |

| Fiber Port Speed       | 100 Mbps                                          |

| Fiber Cable Type       | Multi-mode fiber (62.5/125 µm)                    |

| Fiber Connector Type   | SC                                                |

| Max. Fiber Distance     | 2 km (approx. 1.24 miles)                         |

| Switch Type            | Unmanaged                                         |

| Power Input            | Dual: 12/24/48 VDC (9.6 to 60 VDC)                 |

| Operating Temperature  | -40 to 75°C (-40 to 167°F)                        |

| Enclosure              | IP30                                              |

| Mounting               | DIN-rail                                          |

| MTBF                   | Varies by model configuration (refer to datasheet) |

| Dimensions             | 50 x 135 x 105 mm (1.97 x 5.31 x 4.13 in)           |

Core Features & Market Positioning

The Moxa EDS-308-MM-SC distinguishes itself in the industrial networking market through its emphasis on hardened design and extended network reach capabilities. Its unmanaged nature simplifies deployment, making it an attractive option for applications where ease of use is paramount. The inclusion of multiple multi-mode fiber ports with SC connectors is a significant differentiator, offering a cost-effective solution for extending network segments beyond the limitations of copper cabling, while providing superior resistance to electrical noise prevalent in industrial settings. This positioning makes it ideal for system integrators and end-users seeking reliable, plug-and-play connectivity in challenging environments.

Key Application Scenarios

This industrial Ethernet switch finds extensive use in various sectors requiring robust and extended network connectivity. It is a common choice for industrial automation systems, connecting Programmable Logic Controllers (PLCs), sensors, and actuators across factory floors over longer distances than typically achievable with copper. In the oil and gas industry, its hardened design and fiber optic links make it suitable for SCADA systems and remote monitoring stations exposed to harsh conditions and potential electrical interference. Furthermore, transportation infrastructure, such as intelligent transportation systems (ITS) and railway signaling, benefits from its reliability and immunity to electromagnetic interference.

Practical System Integration Guidance

Integrating the Moxa EDS-308-MM-SC into an existing network is straightforward due to its unmanaged nature. The unit is designed for DIN-rail mounting, facilitating quick installation within control cabinets. Power can be supplied via the terminal block, supporting dual redundant inputs for enhanced reliability; connect the positive and negative terminals for each power source. For network connectivity, simply plug multi-mode fiber optic cables with SC connectors into the respective ports on the switch and connect them to compatible fiber devices or media converters. Ensure that the fiber optic cables are appropriate for multi-mode transmission and within the specified distance limitations for optimal performance.

Operation and Risk Mitigation

Operating the Moxa EDS-308-MM-SC requires minimal configuration, as it functions as a plug-and-play device. The primary operational consideration involves ensuring stable power supply within the specified voltage range and monitoring environmental conditions to stay within the -40 to 75°C operating temperature. Fiber optic connections should be kept clean to prevent signal degradation. Potential risks primarily revolve around power fluctuations; the dual power input feature is crucial for mitigating downtime caused by a single power supply failure. Incorrect fiber cable termination or damage can lead to connection issues, so regular visual inspection of the fiber ports and cables is recommended.

Scalability & Long-Term Value

While the EDS-308-MM-SC is an unmanaged switch, its value lies in its ability to serve as a reliable backbone for extending fiber optic network segments. Its compatibility with standard multi-mode fiber infrastructure allows it to integrate seamlessly into existing plant networks. For enhanced network management and more complex topologies, Moxa offers managed industrial Ethernet switches that can complement the EDS-308-MM-SC in larger deployments. The inherent ruggedness and industrial-grade components ensure a long operational lifespan, reducing the total cost of ownership and offering a dependable foundation for current and future industrial communication needs.

Frequently Asked Questions

What is the maximum distance for the multi-mode fiber ports on the Moxa EDS-308-MM-SC?

The multi-mode fiber ports on the Moxa EDS-308-MM-SC are designed to support distances of up to 2 kilometers. This extended reach is significantly greater than typical copper Ethernet connections, allowing for network segmentation across larger factory floors or facilities. Proper cable quality and connection integrity are vital to achieving this maximum distance reliably.

This distance is suitable for connecting disparate industrial equipment or network segments that are geographically separated within an industrial site. It provides a robust solution for environments where running standard copper Ethernet cables would be impractical or prone to signal degradation over distance. The use of multi-mode fiber also offers inherent advantages in terms of bandwidth and future-proofing for higher data rates.

When planning your network, always account for potential signal loss due to connectors and splices, although at 2 km, this is generally less of a concern with quality multi-mode fiber. Ensure your connected devices or media converters also support the 100 Mbps speed of the EDS-308-MM-SC's fiber ports.

Can the Moxa EDS-308-MM-SC be used in extremely cold or hot environments?

Yes, the Moxa EDS-308-MM-SC is specifically engineered for harsh industrial conditions, featuring a wide operating temperature range from -40 to 75°C (-40 to 167°F). This broad temperature tolerance ensures reliable operation in environments that experience extreme fluctuations, such as outdoor installations or unconditioned factory spaces. The ruggedized enclosure further protects the internal components from dust and physical impact.

This wide temperature range significantly simplifies deployment in applications that might otherwise require costly climate control solutions for network hardware. It guarantees that the switch will function consistently, whether in the freezing cold of winter or the intense heat of summer. The unit's design prioritizes durability and long-term performance under such challenging thermal conditions.

When installing, ensure adequate ventilation is still provided to prevent localized overheating, even within the specified ambient temperature range. Proper power supply stability is also crucial, as extreme temperatures can affect power supply efficiency. Always refer to the product datasheet for any specific environmental caveats.

How is the Moxa EDS-308-MM-SC powered, and what are the options for redundancy?

The Moxa EDS-308-MM-SC features dual power inputs, supporting a wide voltage range of 12/24/48 VDC (9.6 to 60 VDC). This allows for flexible power source selection depending on your existing industrial power infrastructure. The dual input design is critical for implementing power redundancy, a vital feature in industrial settings where network uptime is paramount.

To achieve power redundancy, two separate power supplies can be connected to the switch. If one power supply fails or its input power is interrupted, the switch will automatically and seamlessly switch to the secondary power source without any network interruption. This significantly enhances the reliability and fault tolerance of your industrial network.

Connecting the power inputs is done via a removable terminal block, which simplifies wiring and maintenance. It is important to use appropriately rated wires and ensure secure connections to prevent power-related issues. Verifying the input voltage is within the specified range before connecting power is a standard safety and operational precaution.