Moxa EDS-108-M-SC 8-Port Industrial Multi-mode Ethernet Fiber Switch

The Moxa EDS-108-M-SC is an industrial multi-mode Ethernet fiber switch engineered for robust performance in demanding environments. This 8-port unmanaged switch offers a reliable solution for extending network distances and ensuring data integrity in applications where standard copper Ethernet falls short. Key advantages include its ability to operate in harsh conditions, support for extended temperature ranges, and the inherent immunity of fiber optics to electromagnetic interference (EMI). Core features comprise its compact design, DIN-rail mounting capability, and essential network connectivity through eight Ethernet ports, with two fiber optic ports utilizing SC connectors for multi-mode fiber. Technical specifications highlight an operating temperature range of -40 to 75°C, ensuring functionality in extreme climates, and a power input range of 12/24/48 VDC, providing flexibility for diverse power setups. The Moxa EDS-108-M-SC excels in providing a resilient and cost-effective network backbone for industrial automation, transportation, and utility sectors.

Product Specifications

| Feature                 | Specification                                     |

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

| Model                   | EDS-108-M-SC                                      |

| Ethernet Ports          | 8 x 10/100BaseT(X) RJ45                           |

| Fiber Ports             | 2 x 100BaseFX Multi-mode SC connectors            |

| Fiber Wavelength        | 1310 nm                                           |

| Fiber Distance          | Up to 2 km (Multi-mode)                           |

| Protocol                | IEEE 802.3, 802.3u, 802.3x, 802.3az              |

| Switching Capacity      | 1.6 Gbps                                          |

| Packet Forwarding Rate  | 1.19 Mpps                                         |

| MAC Address Table       | 1K entries                                        |

| Power Input             | 12/24/48 VDC (4-pin, 5.08mm pitch removable screw terminal) |

| Power Consumption       | Max. 4.5 W                                        |

| Operating Temperature   | -40 to 75°C                                       |

| Humidity                | 5 to 95% RH (non-condensing)                      |

| Mounting                | DIN-rail, Wall-mount                              |

| Dimensions (W x D x H)  | 31.5 x 110 x 140 mm (1.24 x 4.33 x 5.51 in)       |

| Enclosure               | IP30                                              |

| MTBF                    | Typically > 500,000 hours                         |

Core Features & Market Positioning

The Moxa EDS-108-M-SC distinguishes itself in the industrial Ethernet market through its robust design and straightforward operation. As an unmanaged switch, it simplifies deployment by eliminating the need for complex configuration, making it ideal for plug-and-play applications. Its dual fiber optic ports with SC connectors offer a critical advantage for extending network reach beyond the limitations of copper cabling, providing immunity to electrical noise and enabling communication over longer distances, up to 2 kilometers for multi-mode fiber. This capability is paramount in environments prone to electromagnetic interference, such as manufacturing floors or outdoor installations. The wide operating temperature range of -40 to 75°C underscores its suitability for harsh industrial settings, a key differentiator compared to commercial-grade switches. Its compact form factor and DIN-rail mounting facilitate easy integration into existing control cabinets, further solidifying its position as a practical and reliable networking component for industrial automation solutions.

Key Application Scenarios

The Moxa EDS-108-M-SC is ideally suited for extending Ethernet connectivity in industrial environments where reliability and extended range are critical. Its multi-mode fiber ports make it an excellent choice for connecting devices across larger factory floors, between buildings on a campus, or in substations where EMI is a significant concern. Typical applications include linking Programmable Logic Controllers (PLCs), Human Machine Interfaces (HMIs), and other control system components that are geographically dispersed or located near high-power electrical equipment. Furthermore, the switch is valuable in transportation systems, such as intelligent transport systems (ITS) or railway signaling, where robust communication infrastructure is essential for operation and safety. Its ability to withstand extreme temperatures ensures dependable performance in outdoor enclosures or unconditioned facilities, supporting scenarios from remote monitoring to process control in demanding sectors like oil and gas.

Practical System Integration Guidance

Integrating the Moxa EDS-108-M-SC into an industrial network is a straightforward process, leveraging its unmanaged nature and standard interface connectors. For initial setup, the unit can be mounted directly onto a standard DIN-rail using its integrated clips, or alternatively, using an optional wall-mount bracket. Power is supplied via a removable 5.08mm pitch terminal block, supporting a wide voltage range (12/24/48 VDC), which simplifies connection to existing power infrastructure. Network connections are made using standard RJ45 connectors for the 10/100BaseT Ethernet ports and SC connectors for the 100BaseFX multi-mode fiber ports. When connecting fiber optics, ensure the correct multi-mode fiber patch cords are used and that the transmit (TX) on one end connects to the receive (RX) on the other, and vice-versa, maintaining polarity. Due to its unmanaged design, no configuration software is required; simply connect the devices and power the switch on.

Operation and Risk Mitigation

Operating the Moxa EDS-108-M-SC requires minimal intervention due to its unmanaged design, focusing on stable network connectivity. The primary operational consideration is ensuring appropriate power supply within the specified voltage range (12/24/48 VDC) to prevent damage. The switch's inherent robustness and wide operating temperature range (-40 to 75°C) mitigate common risks associated with industrial environments, such as thermal stress and vibration. To prevent network disruptions, it's crucial to use appropriate cabling; for the fiber ports, only multi-mode fiber patch cords (e.g., 62.5/125 µm or 50/125 µm) should be used, and care must be taken to avoid excessive bending radii to maintain signal integrity over the 2 km distance limit. While the switch itself is highly reliable with a typical MTBF exceeding 500,000 hours, network instability can arise from downstream device failures or incorrect cabling. Regular visual inspection of connections and ensuring proper ventilation for heat dissipation, although minimal, are good practices.

Scalability & Long-Term Value

The Moxa EDS-108-M-SC offers a foundation for scalable industrial networks, primarily through its ability to extend existing Ethernet infrastructure using fiber optics. While it is an unmanaged switch, its reliability and the inherent future-proofing of fiber optic technology contribute to long-term value. Its compatibility with the IEEE 802.3 standards ensures interoperability with a wide range of industrial Ethernet devices. For network expansion, additional EDS-108-M-SC switches can be cascaded, or integrated with managed switches in a higher-level network architecture, to accommodate growing device counts and increasing bandwidth demands. The robust construction and extended temperature range ensure that the device will remain operational for years in demanding environments, minimizing the need for premature replacement. This makes it a cost-effective solution for building a resilient network backbone that can support the evolving needs of Industrial Internet of Things (IIoT) and Industry 4.0 initiatives by providing reliable connectivity to edge devices.

Frequently Asked Questions

What is the maximum distance the Moxa EDS-108-M-SC can support over fiber optics?

The Moxa EDS-108-M-SC is designed for industrial networking and supports multi-mode fiber optic connections. For multi-mode fiber, the maximum supported transmission distance is up to 2 kilometers. This extended range is crucial for connecting devices across large factory floors, between separate buildings, or in utility applications where standard copper Ethernet cables would not suffice due to signal degradation.

This specific distance capability ensures reliable data transfer in environments where physical separation of network nodes is a requirement. Proper selection of multi-mode fiber type (e.g., OM1, OM2, OM3) can further optimize performance, though the 2 km limit remains consistent across standard multi-mode implementations for this device.

The use of fiber optics also provides immunity to electromagnetic interference (EMI), which is a significant advantage in industrial settings. This intrinsic characteristic of fiber further enhances the reliability of communication over the 2 km range, making it suitable for applications near high-power machinery or in areas with significant electrical noise.

What are the power requirements for the Moxa EDS-108-M-SC?

The Moxa EDS-108-M-SC is designed with flexible power input options to suit various industrial power systems. It supports a wide DC voltage range, typically accepting 12, 24, or 48 VDC. This broad input range allows for easy integration into existing power infrastructures common in industrial automation and control systems, eliminating the need for specialized power converters in many cases.

The power is supplied through a removable terminal block connector, which is a standard feature for industrial equipment, allowing for secure and easy wiring. The device also features dual power inputs, providing redundancy for critical applications. If one power source fails, the switch can continue to operate using the backup power supply, significantly enhancing network uptime and reliability.

To ensure optimal performance and longevity, it is essential to use a power source that operates within the specified voltage parameters and provides sufficient current for the switch's maximum power consumption. The switch has a low power consumption, typically around 4.5 watts, making it energy-efficient for continuous operation.

How do I install the Moxa EDS-108-M-SC in an industrial control cabinet?

Installation of the Moxa EDS-108-M-SC is designed to be user-friendly and compliant with industrial cabinet standards. The switch features integrated DIN-rail mounting capabilities, allowing for quick and secure attachment to a standard 35mm DIN-rail commonly found in control cabinets. This method is fast and requires no special tools, simplifying the mounting process.

Alternatively, if DIN-rail mounting is not feasible, the unit can be secured using an optional wall-mount bracket. This provides flexibility for different cabinet designs or for installations outside of a typical cabinet. Ensure the chosen mounting location provides adequate ventilation, although the switch is designed for high-temperature operation.

Once mounted, the network connections are made using standard RJ45 connectors for copper Ethernet ports and SC connectors for the multi-mode fiber optic ports. Power is connected via the removable terminal block. The compact dimensions of the EDS-108-M-SC also facilitate its integration without consuming excessive space in crowded cabinets.