IMC-21A-S-SC-T – MOXA Ethernet-to-Fiber Media Converters

USD $ 242.76


Manufacturer Part Number: MOXA IMC-21A-S-SC-T
OEM Spec Ref 

The MOXA IMC-21A-S-SC-T Ethernet-to-Fiber Media Converters is a highly reliable and robust device designed to facilitate seamless communication between Ethernet and fiber optic networks. This converter is essential for extending communication distances via fiber optics, providing a sturdy link between copper and fiber cabling.

Key Features:

  • High-Speed Fiber Optic Connectivity: Supports fast Ethernet interfaces, ensuring high-speed data transmission over fiber optic cables which is essential for industrial environments where long-distance data transmission is crucial.
  • Rugged Industrial Design: The IMC-21A-S-SC-T is built to endure extreme industrial environments, featuring a wide operating temperature range from -40 to 75°C, which ensures performance stability under varying climatic conditions.
  • Enhanced Network Reliability: Equipped with Link Fault Pass-Through (LFP) technology, this converter enhances network reliability by immediately notifying administrators about fiber link errors, minimizing downtime and operational disruptions.
  • Easy Installation and Maintenance: Designed for hassle-free setup, this media converter supports plug-and-play functionality and can be easily mounted on a DIN rail or in a distribution box, making it convenient for various industrial settings.
  • Flexible Power Options: It supports a dual input power supply, ranging from 12 to 48 VDC, which provides power redundancy and ensures uninterrupted operation, even in the event of a power failure.


  • Extended Network Reach: Enables network distances to be extended beyond the typical range of Ethernet, up to 15 km, using single-mode fiber, which is ideal for connecting remote areas of industrial plants.
  • High Durability and Longevity: With a rugged casing and resistance to electromagnetic interference, the converter ensures a long operational lifespan, reducing the need for frequent replacements and maintenance.
  • Operational Efficiency: By converting and extending network links, it reduces the need for extensive cabling, saving on infrastructure costs and simplifying network layouts.
  • Increased System Safety: Its design complies with industrial safety standards, reducing the risk of fire hazards due to sparks or excessive heat.


  • Industrial Automation: Vital for connecting devices in automated production lines where long-distance data transmission is required.
  • Traffic Management Systems: Plays an essential role in traffic control centers by ensuring continuous data flow over extended distances.
  • Surveillance Networks: Ideal for linking multiple surveillance cameras over large areas like airports or city surveillance systems.
  • Remote Monitoring and Management: Enables effective monitoring and management of utilities and facilities spread over wide geographic areas.

The MOXA IMC-21A-S-SC-T Ethernet-to-Fiber Media Converters is a cornerstone in MOXA’s dedication to enhancing communication and operational efficiencies in harsh industrial environments, ensuring reliable and secure data transmission across extensive networks.


Ethernet Interface 10/100BaseT(X) Ports (RJ45 connector) 1
100BaseFX Ports (single-mode SC connector) 1
Magnetic Isolation Protection 1.5 kV (built-in)
Optical Fiber Refer table 2
Power Parameters Input Current 12 to 48 VDC, 265mA (Max.)
Input Voltage 12 to 48 VDC
Overload Current Protection Supported
Power Connector Terminal block
Reverse Polarity Protection Supported
Physical Characteristics Housing Metal
IP Rating IP30
Dimensions 30 x 125 x 79 mm (1.19 x 4.92 x 3.11 in)
Weight 170 g (0.37 lb)
Installation DIN-rail mounting
Environmental Limits Operating Temperature -40 to 75°C (-40 to 167°F)
Storage Temperature -40 to 75°C (-40 to 167°F)
Ambient Relative Humidity 5 to 95% (non-condensing)
Standards and Certifications EMC EN 55032/24
EMI CISPR 32, FCC Part 15B Class A
EMS IEC 61000-4-2 ESD: Contact: 6 kV; Air: 8 kV
IEC 61000-4-3 RS: 80 MHz to 1 GHz: 3 V/m
IEC 61000-4-4 EFT: Power: 1 kV; Signal: 0.5 kV
IEC 61000-4-5 Surge: Power: 1 kV; Signal: 1 kV
IEC 61000-4-6 CS: 150 kHz to 80 MHz: 3 V/m; Signal: 3 V/m
IEC 61000-4-8 PFMF
IEC 61000-4-11
Environmental Testing IEC 60068-2-1
IEC 60068-2-2
IEC 60068-2-3
Safety EN 60950-1, UL 60950-1
Vibration IEC 60068-2-6
MTBF Time 353,000 hrs
Standards MIL-HDBK-217F
Warranty Warranty Period 5 years
Details See


Optical Fiber

Multi-Mode Single-Mode
Fiber Cable Type OM1 50/125 µm G.652
800 MHz x km
Typical Distance 4 km 5 km 40 km
Wavelength Typical (nm) 1300 1310
TX Range (nm) 1260 to 1360 1280 to 1340
RX Range (nm) 1100 to 1600 1100 to 1600
Optical Power TX Range (dBm) -10 to -20 0 to -5
RX Range (dBm) -3 to -32 -3 to -34
Link Budget (dB) 12 29
Dispersion Penalty (dB) 3 1

Note: When connecting a single-mode fiber transceiver, we recommend using an attenuator to prevent damage caused by excessive optical power.
Note: Compute the “typical distance” of a specific fiber transceiver as follows: Link budget (dB) > dispersion penalty (dB) + total link loss (dB).

Weight 0.17 kg
Dimensions 3 × 12.5 × 7.9 cm