Fiber Converter IMC-21A Series

- Versatile 12 to 48 VDC power inputs
- Supports Link Fault Pass-Through (LFPT)
- Multimode and single-mode models with SC or ST fiber connectors are available
- TP port’s connection speed, Half/Full-duplex mode and Force/Auto mode are DIP switch selectable
- The fiber port’s Half/Full-duplex mode are DIP switch selectable
- LED status indicators
- RJ45 Ethernet port supports auto-negotiation in 10BaseT and 100BaseT(X) modes
- Overload current protection of 1.1A
- Reverse polarity protection
- Compact design (30 x 115 x 70mm), 170grams, Din-rail mountable

Extend your ethernet devices transmission distance with Moxa IMC-21A industrial ethernet fo fiber media converters. Designed to provide reliable and stable operation in harsh industrial environments. Housed in a heavy duty IP30 metal enclosure and weighing Moxa IMC-21A converters are easy to mount on a DIN rail or in distribution boxes.

Fiber Optic Port Connection

The concept behind the SC/ST port and cable is straightforward. Suppose you are connecting devices I and II. Contrary to electrical signals, optical signals do not require a circuit in order to transmit data. Consequently, one of the optical lines is used to transmit data from device I to device II, and the other optical line is used transmit data 
from device II to device I, for full-duplex transmission.

Simply connect the Tx (transmit) port of device I to the Rx (receive) port of device II, and the Rx (receive) port of device I to the Tx (transmit) port of device II. If you make your own cables, we suggest labeling the two sides of the same line with the same letter 

Auto MDI/MDI-X Connection
The Auto MDI/MDI-X function allows users to connect the Moxa IMC’s 10/100BaseT(X) ports to any kind of Ethernet device, regardless of the type of Ethernet cable used for the connection. This means that you can use either a straight-through cable or crossover cable to connect Moxa IMC to Ethernet devices.

Dual Speed Functionality and Switching
Moxa IMC’s 10/100 Mbps switched RJ45 port auto negotiates with the connected device for the fastest data transmission rate supported by both devices. All models of Moxa IMC are plug-and-play devices, so that software configuration is not required during installation or maintenance. The half-/full-duplex mode for the switched RJ45 ports is user dependent and changes (by auto-negotiation) to full- or halfduplex, depending on which transmission speed is supported by the attached device