Moxa IMC-21-M-ST Industrial Ethernet to Fiber Converter

Technical Overview

Entry-level industrial 10/100BaseT(X) to 100BaseFX media converter with multi-mode ST fiber, 12-48 VDC input, and -10 to 60°C operation.

Key Features

Converts 10/100BaseT(X) Ethernet to 100BaseFX fiber optic signals.
Equipped with a multi-mode ST fiber connector.
Accepts a wide power input range of 12 to 48 VDC.
Operates reliably in temperatures from -10 to 60°C.
IP30 rated plastic housing for protection against solid objects.
Designed for easy DIN-rail mounting.
Supports Link Fault Pass-Through (LFPT) for effective link failure detection.
DIP switches allow selection of FDX/HDX/10/100/Auto/Force modes.

Technical Specification Matrix

Parameter	Value
Input Voltage	12 to 48 VDC
Input Current	0.271A (Max.)
Magnetic Isolation Protection	1.5 kV (built-in)
Overload Current Protection	Supported
Ethernet Ports	1 x 10/100BaseT(X) (RJ45 connector)
Fiber Ports	1 x 100BaseFX (multi-mode ST connector)
Housing Material	Plastic
IP Rating	IP30
Operating Temperature	-10 to 60°C (14 to 140°F)
Storage Temperature	-40 to 70°C (-40 to 158°F)
Ambient Relative Humidity	5 to 95% (non-condensing)
Installation	DIN-rail mounting
Physical Weight (kg)	0.13
Dimensions L x W x H (cm)	10.9 x 9.7 x 2.5

Industrial Applications

1. Factory Automation Network Extension

Extends standard Ethernet networks over longer distances within a factory floor, mitigating electromagnetic interference from heavy machinery by converting copper to fiber optic signals.

Problem Solved

Provides reliable long-distance network connectivity in electromagnetically noisy industrial environments where copper cabling would be susceptible to interference and distance limitations.

Ethernet-to-Fiber conversion10/100BaseT(X)100BaseFX1.5 kV magnetic isolationDIN-rail mountingIndustrial networking

2. Industrial Surveillance Systems

Connects IP cameras in industrial outdoor or challenging indoor settings back to a central control room over fiber optic cables, ensuring robust and interference-free video transmission.

Problem Solved

Ensures stable video data transmission over extended distances in areas with electrical noise or potential ground loops, leveraging fiber's immunity to EMI and extending reach beyond copper limitations.

Fiber optic communicationMulti-mode ST connectorIP30 rating12-48 VDC power inputHarsh environment operation

3. Utility Substation Data Transmission

Facilitates secure and reliable data communication between control equipment and supervisory systems within electrical utility substations, where high voltage and electrical noise are common.

Problem Solved

Establishes robust data links resistant to significant electromagnetic interference (EMI) and transient voltages prevalent in substation environments, protecting sensitive control data.

Industrial-grade reliability-10 to 60°C operating temperature1.5 kV isolationFiber optic backboneElectrical noise immunity