General
Maximum range	4 km
Wavelength	1300 nm
Dispersion penalty	3 dB
Air humidity	5–95 % (nicht kondensierend)

The Moxa IMC-21-M-SC is an industrial media converter that converts Ethernet signals in 10/100BaseT(X) format via RJ45 interface into 100BaseFX fiber optic signals. It is specifically designed for industrial applications with limited budget and enables a cost-efficient connection between copper and fiber optic networks. The device is equipped with an SC connector for multi-mode fiber and supports a maximum transmission distance of up to 4 km. The conversion is bidirectional, with the RJ45 interface supporting Auto-Negotiation and Auto-MDI/MDI-X to ensure automatic adaptation to the connected network component.

Applications

The IMC-21-M-SC is designed for use in industrial environments, particularly in enclosures, distribution boxes, or decentralized automation stations. Its robust design and DIN rail mounting enable easy integration into existing systems. The operating temperature range of -10 to 60 °C and storage temperature of -40 to 70 °C make the device suitable for a wide range of industrial conditions. The humidity range of 5 to 95 % (non-condensing) ensures reliable operation even in humid environments.

Functions and Equipment in Detail

The converter features simple configuration via DIP switches, allowing control of operating parameters such as transmission rate or link status. An integrated Link Fault Pass-Through (LFPT) ensures that in the event of a fiber optic connection failure, the Ethernet signal continues to be transmitted, thereby increasing network availability. Power supply is provided via a flexible voltage range of 12 to 48 VDC, facilitating integration into existing industrial power supply systems. An overcurrent protection safeguards the device against damage from excessive current draw.

Technology Explained Simply

The optical characteristics of the device are optimized for use with multi-mode fiber. The wavelength is 1300 nm, the TX power ranges from -10 to -20 dBm, and the reception range (RX) spans from -3 to -32 dBm. The link budget of 12 dB enables efficient signal transmission over the maximum range of 4 km. The dispersion penalty is 3 dB, which maintains signal quality over the distance. The plastic housing provides IP30 protection, safeguarding against solid objects larger than 2.5 mm and splashing water from specific angles. The dimensions of 25 x 109 x 97 mm and weight of 125 g make the device compact and easy to mount.

Compatibility and Accessories

The IMC-21-M-SC is equipped with an SC connector for multi-mode fiber and can be connected to corresponding fiber optic cables. Compatibility with other models in the IMC-21 series, such as the IMC-21-M-ST (ST connector) or IMC-21-S-SC (single-mode, SC connector), allows for flexible selection based on requirements. Certifications according to EN 55032/24, FCC Part 15B, CISPR 32, IEC 61000-4-2 to -4-11, and UL/EN 60950-1 ensure compliance with EMC, EMS, and safety standards. Environmental and vibration tests according to IEC 60068-2-1/2/3/6 confirm reliability under industrial conditions.

Mounting and Installation

Mounting is done via a DIN rail, enabling quick and secure installation in enclosures or distribution boxes. The flexible power supply range of 12 to 48 VDC allows use with various industrial power sources. Configuration is performed via DIP switches, which are directly accessible on the device. Connection points are clearly marked, with the RJ45 interface designated for the Ethernet cable and the SC connector for the fiber optic cable.

Operational Advantages

Operation of the IMC-21-M-SC is characterized by its simple configuration and high reliability. The integrated LFPT function enhances network stability by forwarding the Ethernet signal in case of fiber optic failure. The long service life of 353,000 hours (MTBF according to MIL-HDBK-217F) and the 5-year manufacturer’s warranty highlight the device’s robustness. The combination of compact dimensions, flexible power supply, and industrial certification makes the converter a reliable solution for industrial networks.

Scope of Delivery

The scope of delivery includes the IMC-21-M-SC media converter, a quick start guide, and a warranty card.