Moxa IMC-21A Industrial Ethernet to Fiber Media Converter

Technical Overview

Rugged 10/100BaseT(X) to 100BaseFX multi-mode ST fiber media converter with -40 to 75°C operating temp and IP30 metal housing.

Key Features

10/100BaseT(X) to 100BaseFX media conversion.
Multi-mode fiber with ST connector for 100BaseFX.
Wide operating temperature range from -40 to 75°C.
DIP switches for flexible configuration of FDX/HDX/10/100/Auto/Force modes.
Link Fault Pass-Through (LFP) for efficient network troubleshooting.
DIN-rail mounting for easy installation in control cabinets.
IP30-rated metal housing for protection against dust and water ingress.
1.5 kV magnetic isolation protection for enhanced system reliability.
12 to 48 VDC power input with overload and reverse polarity protection.

Technical Specification Matrix

Parameter	Value
Input Voltage	12 to 48 VDC
Input Current (Max)	265 mA @ 12 VDC
Overload Current Protection	Supported (1.1 A)
Reverse Polarity Protection	Supported
Power Connector	Terminal block
Magnetic Isolation Protection	1.5 kV (built-in)
Ethernet Ports	1 x 10/100BaseT(X) (RJ45)
Fiber Ports	1 x 100BaseFX (Multi-mode ST connector)
Housing	Metal
IP Rating	IP30
Installation	DIN-rail mounting
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)
MTBF (Mean Time Between Failures)	353,000 hrs (MIL-HDBK-217F, GB 25°C)
Physical Weight (kg)	0.17
Dimensions L x W x H (cm)	12.5 x 3 x 7.9

Industrial Applications

1. Outdoor Industrial Control Cabinets

This media converter is ideal for extending Ethernet networks over fiber in outdoor industrial control cabinets or roadside enclosures. Its wide operating temperature range of -40 to 75°C and IP30 metal housing provide protection against harsh environmental conditions and temperature fluctuations.

Problem Solved

Ensures reliable Ethernet communication and network extension in unheated or outdoor industrial environments subject to extreme temperatures, preventing data loss or equipment failure due to thermal stress.

Extended Temperature RangeIP30 ProtectionEthernet-to-Fiber ConversionDIN-rail Mounting

2. Factory Floor Automation & SCADA Systems

The IMC-21A-M-ST-T facilitates long-distance and noise-immune Ethernet connectivity between control rooms and devices on noisy factory floors. The use of multi-mode ST fiber mitigates electromagnetic interference (EMI) that can disrupt traditional copper Ethernet, while 1.5 kV magnetic isolation protects against electrical surges.

Problem Solved

Provides robust, interference-free data transmission for critical automation and SCADA systems in electrically noisy industrial environments, overcoming distance limitations and improving data integrity.

Fiber Optic CommunicationEMI Immunity1.5 kV IsolationIndustrial Ethernet

3. Transportation Infrastructure (Roadside/Railway)

Suitable for connecting traffic control systems, surveillance cameras, or railway signaling equipment via fiber optics. The robust design with -40 to 75°C operating temperature, 12-48 VDC input with reverse polarity protection, and DIN-rail mounting makes it resilient to power fluctuations and confined space installations common in transportation applications.

Problem Solved

Extends reliable network connectivity over long distances in harsh and variable conditions typical of transportation infrastructure, ensuring continuous operation of vital monitoring and control systems.

Wide Voltage InputReverse Polarity ProtectionMulti-mode FiberRugged Design