Moxa IMC-21A-M-SC Fiber Media Converter

The Moxa IMC-21A-M-SC is a robust industrial fiber media converter designed for reliable network extension in harsh environments. Its core advantages lie in its ability to convert electrical Ethernet signals to optical fiber signals, enabling longer transmission distances and immunity to electromagnetic interference. Key technical parameters include a wide operating temperature range of -40 to 75°C, dual redundant power inputs (12/24/48 VDC), and a compact DIN-rail mountable form factor. This converter is engineered for critical industrial applications where network stability and longevity are paramount.

Product Specifications

| Feature               | Specification                               |

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

| Ethernet Ports        | 1 x 10/100BaseT(X) RJ45, Auto MDI/MDI-X      |

| Fiber Ports           | 1 x 100BaseFX SC Connector                  |

| Fiber Wavelength      | 1310 nm                                     |

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

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

| Switch Properties     | Store-and-forward switching                 |

| MAC Table Size        | 1K entries                                  |

| Packet Buffer         | 768 Kbits                                   |

| Power Input           | Dual Redundant 12/24/48 VDC                 |

| Power Consumption     | Max. 2.5 W                                  |

| Dimensions            | 30 x 103 x 84 mm (1.18 x 4.06 x 3.31 in)      |

| Mounting              | DIN-rail, Wall-mount                        |

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

| Storage Temperature   | -40 to 85°C (-40 to 185°F)                  |

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

| Vibration Resistance  | IEC 60068-2-6                               |

| Shock Resistance      | IEC 60068-2-27                              |

| Free Fall Resistance  | IEC 60068-2-32                              |

| EMI                   | FCC Part 15 CISPR |

| EMS                   | IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), IEC 61000-4-5 (Surge) |

| MTBF                  | 2,228,870 hours                             |

| Warranty              | 5 years                                     |

Core Features & Market Positioning

The Moxa IMC-21A-M-SC stands out in the industrial Ethernet converter market due to its robust design and unwavering reliability. Its capability to seamlessly bridge copper and fiber optic networks in demanding environments positions it as a go-to solution for industrial automation and control systems. The converter's adherence to stringent industrial standards, including shock, vibration, and wide temperature tolerance, underscores its suitability for sectors like manufacturing, transportation, and energy. Unlike many consumer-grade media converters, the IMC-21A-M-SC is built for continuous operation under extreme conditions, offering a significant competitive advantage in terms of uptime and longevity.

Key Application Scenarios

This industrial media converter excels in extending Ethernet networks across significant distances or in environments with high electromagnetic noise. It is frequently deployed in factory floor automation to connect Programmable Logic Controllers (PLCs), Human-Machine Interfaces (HMIs), and other distributed I/O devices to the central control system via fiber. In transportation infrastructure, the IMC-21A-M-SC facilitates reliable communication for traffic management systems, railway signaling, and tunnel surveillance cameras, where signal integrity over long runs is critical. Its resilience also makes it ideal for outdoor applications in substations, oil and gas facilities, and renewable energy sites.

Practical System Integration Guidance

Integrating the Moxa IMC-21A-M-SC is straightforward, requiring minimal configuration. The RJ45 port supports Auto MDI/MDI-X, eliminating the need for crossover cables when connecting to standard Ethernet devices. For the fiber optic connection, ensure the SC connector on the converter is mated with the appropriate SC fiber optic cable. Power is supplied via the dual terminal blocks, which accept a wide voltage range (12/24/48 VDC), providing flexibility and redundancy. A simple power-on self-test confirms operational readiness. The DIN-rail mounting mechanism ensures secure and quick installation within industrial enclosures.

Operation and Risk Mitigation

The Moxa IMC-21A-M-SC operates autonomously as a plug-and-play device once powered and connected. Its robust industrial design inherently mitigates common operational risks associated with network equipment in harsh settings. The wide operating temperature range ensures performance stability in extreme heat or cold, while the dual power inputs protect against single power supply failures. For troubleshooting, verify power connections and ensure the fiber optic cable is properly seated and free from damage. Indicator LEDs on the front panel provide visual status for power, link, and activity on both Ethernet and fiber ports, aiding in rapid diagnostics.

Scalability & Long-Term Value

The IMC-21A-M-SC offers excellent long-term value by providing a stable foundation for industrial network expansion. Its compatibility with the IEEE 802.3 Ethernet standards ensures interoperability with a wide array of industrial devices and network infrastructure. As industrial operations evolve towards greater digitization and IIoT integration, the ability to reliably extend network reach using fiber optics becomes increasingly important. This converter serves as a critical component in building resilient, high-performance networks that can support future data demands and advanced automation strategies, backed by Moxa's industry-leading 5-year warranty.

Frequently Asked Questions

What is the maximum fiber optic distance supported by the Moxa IMC-21A-M-SC?

The Moxa IMC-21A-M-SC supports up to 2 kilometers of transmission distance using multi-mode fiber optic cable. This distance is suitable for most factory floor and campus-wide applications. It utilizes a standard 1310 nm wavelength for its 100BaseFX fiber optic connection.

The SC connector ensures a secure and reliable physical link for the optical signal transmission. This extended reach is crucial for connecting disparate network segments within a large industrial facility.

Ensuring the correct type and quality of multi-mode fiber cable is vital for achieving the maximum specified distance. The converter is designed for robust performance within this range.

Can the Moxa IMC-21A-M-SC be powered by 24VDC?

Yes, the Moxa IMC-21A-M-SC is designed to accept a wide range of DC power inputs, including 12VDC, 24VDC, and 48VDC. It features dual redundant power inputs for enhanced reliability. This allows for flexible power sourcing in various industrial power setups.

Connecting to either of the two power input terminals will power the device. Using both terminals with separate power sources provides redundancy, ensuring continuous operation if one power supply fails.

Proper wiring of the DC power source to the terminal block is essential. Always refer to the product manual for correct polarity and voltage specifications to avoid damage.

What type of fiber optic connector does the Moxa IMC-21A-M-SC use?

The Moxa IMC-21A-M-SC utilizes an SC fiber optic connector. This is a common and robust connector type widely adopted in industrial and telecommunications applications. The SC connector is known for its push-pull latching mechanism for secure engagement.

This connector is designed for easy and reliable connection and disconnection of the fiber optic cable. The "SC" designation stands for Subscriber Connector or Standard Connector.

Ensure that the fiber optic patch cable also features SC connectors on both ends for a direct and proper connection to the media converter. Always clean fiber connectors before mating to prevent signal degradation.