The IMC-21A Series by Moxa is a rugged industrial media converter that transforms 10/100BaseT(X) Ethernet into 100BaseFX fiber, designed for stable operation in harsh conditions. Featuring a metal housing and support for extended temperatures down to -40°C (for -T models), these converters ensure reliable data transmission in applications ranging from automation to infrastructure.

Available with SC or ST connectors for both multi-mode and single-mode fiber, the IMC-21A includes Link Fault Pass-Through (LFPT), DIP switches for duplex/speed/operation selection, and enhanced protections such as overload and reverse polarity protection. With support for DIN-rail mounting, this unit is ready for cabinet integration in any industrial setting.

Technical Specifications:

Ethernet Interface:

• 1 x 10/100BaseT(X), RJ45 (auto negotiation, auto MDI/MDI-X)
• 1 x 100BaseFX (per model):
• Multi-mode SC: IMC-21A-M-SC / M-SC-T (up to 4 km)
• Multi-mode ST: IMC-21A-M-ST / M-ST-T (up to 4 km)
• Single-mode SC: IMC-21A-S-SC / S-SC-T (up to 40 km)

Optical Specifications:

• Wavelength: 1300 nm (MM), 1310 nm (SM)
• TX Power: -10 to -20 dBm (MM), 0 to -5 dBm (SM)
• RX Range: -3 to -32 dBm (MM), -3 to -34 dBm (SM)
• Link Budget: 12 dB (MM), 29 dB (SM)
• Dispersion Penalty: 3 dB (MM), 1 dB (SM)
• Note: Attenuator recommended for single-mode

Power Parameters:

• Input Voltage: 12 to 48 VDC
• Max. Current: 265 mA
• Overload/Reverse Polarity Protection: Supported
• Connector: Terminal block

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)
• Mounting: DIN-rail

Environmental Limits:

• Operating Temperature:
• Standard: -10 to 60°C
• Wide Temp (-T): -40 to 75°C
• Storage Temperature: -40 to 75°C
• Humidity: 5 to 95% (non-condensing)

Certifications:

• EMC/EMI: EN 55032/35, FCC Part 15B, CISPR 32
• EMS: IEC 61000-4-2 to -4-11
• Safety: UL/EN 60950-1
• Environmental: IEC 60068-2-1/3
• Vibration: IEC 60068-2-6

MTBF:

• 353,000 hours (MIL-HDBK-217F standard)

Warranty:

• 5-year manufacturer warranty

Package Contents:

• 1 x IMC-21A media converter
• 1 x Quick installation guide
• 1 x Warranty card