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

USD $ 257.25


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

The MOXA IMC-21A-M-SC-T Ethernet-to-Fiber Media Converters is a state-of-the-art networking solution designed to enhance data transmission capabilities across industrial environments. This robust converter facilitates reliable Ethernet to fiber media conversion, ensuring optimal data integrity and extended transmission range.

Key Features:

  • High-Speed Data Transmission: Offers seamless media conversion, enabling high-speed Ethernet data transmission over fiber optic cables to ensure minimal signal loss and superior data integrity.
  • Industrial-Grade Durability: Built to withstand the rigors of industrial settings, this media converter is housed in a rugged casing that protects against dust, vibrations, and temperature variations.
  • Wide Temperature Range: Engineered for reliability in extreme environments, it operates effectively in temperatures ranging from -40°C to 75°C, making it ideal for outdoor installations and other harsh conditions.
  • Easy Installation: Designed for convenience, it supports plug-and-play installation and features a compact form factor, allowing for easy integration into existing network infrastructures without extensive modifications.
  • Fault Alert and Link Failure Alarm: Equipped with advanced diagnostics, including LED indicators and relay output warnings for link failure, enhancing network reliability through immediate problem identification.


  • Extended Network Range: By converting Ethernet signals into fiber optic transmissions, it allows data to travel longer distances without degradation, expanding the reach of network infrastructures.
  • Enhanced Data Security: Fiber optic cables are less susceptible to electromagnetic interference and eavesdropping, providing a more secure transmission medium.
  • Reduced Network Downtime: With robust construction and reliable performance under extreme conditions, this converter reduces the likelihood of system failures, minimizing downtime and maintenance costs.
  • Scalable Solutions: Supports scalable network designs, accommodating future expansions and upgrades with minimal disruptions to operational processes.


  • Industrial Automation: Vital for connecting devices in automation systems where long-distance data transmission is necessary, ensuring seamless communication across the plant floor.
  • Traffic Management Systems: Plays a crucial role in traffic control and surveillance systems, offering reliable data transmission that is critical for real-time monitoring and decision-making.
  • Energy Management: Used extensively in power stations and smart grid applications where stable and reliable data connections are essential for operational efficiency and safety.
  • Remote Monitoring Systems: Ideal for use in remote monitoring and control systems, providing stable and secure data transmission paths in environmentally challenging locations.

The MOXA IMC-21A-M-SC-T Ethernet-to-Fiber Media Converters exemplifies MOXA’s commitment to delivering high-performance networking solutions tailored for demanding industrial applications, driving enhanced connectivity and network resilience.


Ethernet Interface 10/100BaseT(X) Ports (RJ45 connector) 1
100BaseFX Ports (multi-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