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

USD $ 164.01


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

The MOXA IMC-21A-S-SC is an advanced Ethernet-to-Fiber Media Converters designed to bridge the gap between copper and fiber networks. This robust converter is an essential component for modern industrial settings, ensuring reliable and continuous network performance even in harsh environments. It is tailored for seamless integration into various industrial applications, promoting enhanced data transmission stability and network scalability.

Key Features:

  • Seamless Network Integration: This media converter supports 10/100BaseT(X) and 100BaseFX networks, enabling effortless integration with existing Ethernet and fiber infrastructure, which enhances network flexibility and extends data transmission distances.
  • Rugged Design: Engineered to operate reliably within a wide temperature range of -10 to 60°C, the IMC-21A-S-SC is built to withstand industrial environments, ensuring operational continuity in varying climatic conditions.
  • Easy Installation and Maintenance: The device features a simple plug-and-play setup and an LED indicator system that provides immediate status feedback, making both installation and maintenance straightforward and minimal.
  • High-Level Data Transmission Security: With built-in Link Fault Pass-Through (LFP) and Far End Fault (FEF) functionalities, this converter enhances network reliability and minimizes data loss, ensuring secure and stable network communications.
  • Compact and Versatile: Its compact size makes it suitable for space-constrained applications, while its DIN-rail mounting capability allows for easy integration into various industrial setups.


  • Enhanced Network Efficiency: By facilitating the conversion between transmission media types, network flexibility and reach are significantly enhanced, leading to improved system efficiency and extended network layouts.
  • Durable Performance: Constructed from industrial-grade materials, the IMC-21A-S-SC promises longevity and resilience, reducing potential downtime and maintenance costs.
  • Increased Operational Reliability: It ensures a consistent and reliable fiber connection, which is crucial for critical industrial networks where uninterrupted data flow is essential.
  • Safety and Compliance: Meets rigorous industrial safety standards and is equipped with redundant power inputs to prevent power failures, enhancing overall system safety.


  • Industrial Automation: Plays a pivotal role in maintaining robust data communication links within automated production lines, ensuring smooth and efficient operations.
  • Traffic Management Systems: Critical in traffic control environments where consistent and reliable data transmission is necessary for operational safety and effectiveness.
  • Remote Monitoring and Control: Enables reliable long-distance communication links for remote operation centers, facilitating effective monitoring and management of distant industrial sites.
  • Utility Facilities: Ideal for utility plants and outdoor installations that require robust performance despite environmental challenges.

The MOXA IMC-21A-S-SC Ethernet-to-Fiber Media Converters stands as a cornerstone of MOXA’s commitment to enhancing connectivity and reliability in industrial network infrastructures, offering a powerful solution for ensuring uninterrupted and secure network communications.


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 -10 to 60°C (14 to 140°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