General
Range	40 km
Wavelength	1310 nm
Link budget	29 dB

The Moxa IMC-21A-S-SC is an industrial media converter that converts 10/100BaseT(X) copper network signals into 100BaseFX fiber optic signals. It is designed for use in demanding industrial environments where a reliable and stable network connection is required under harsh conditions. The device features an RJ45 port for copper connection and an SC connector for single-mode fiber optic, enabling integration into existing networks with fiber infrastructure. The robust metal housing construction and IP30 protection rating provide effective protection against dust and mechanical impacts, making the device suitable for use in enclosures or outdoor environments.

Applications

The IMC-21A-S-SC is suitable for applications in industrial automation, such as production facilities, power supply networks, or transportation, where high bandwidth and long transmission distances are required. The single-mode technology enables a range of up to 40 km, making it particularly suitable for connecting remote sites or extending networks over large distances. The operating temperature of -10 to 60 °C (standard model) is sufficient for many industrial applications; for critical outdoor applications or extreme climatic conditions, T-models with an operating temperature range of -40 to 75 °C are available.

Functions and Features in Detail

A central feature of the converter is the Link Fault Pass-Through (LFPT) function, which detects faults on the fiber link and forwards them to the network to enable quick fault diagnosis. Configuration is performed via DIP switches, which allow the duplex mode (full- or half-duplex), speed (10/100 Mbit/s), and auto-negotiation to be enabled or disabled. This manual control offers flexibility in adapting to different network environments. The integrated protection circuit against reverse polarity and overcurrent increases operational safety and protects the device from damage due to incorrect power supply.

Technology Explained Simply

The converter operates with a supply voltage of 12 to 48 VDC and consumes a maximum of 265 mA. Power supply is via a terminal block, ensuring a secure and mechanically stable connection. The optical characteristics are designed for single-mode fiber: the wavelength is 1310 nm, the transmit power (TX) ranges from 0 to -5 dBm, and the receive power (RX) ranges from -3 to -34 dBm. The link budget is 29 dB, enabling the maximum range of 40 km. The magnetic isolation of 1.5 kV protects the device from electrical interference and voltage surges.

Compatibility and Accessories

The IMC-21A-S-SC is compatible with standard 100BaseFX fiber optic cables in single-mode format (G.652) and uses an SC connector. The use of attenuators is recommended if the optical power is too high to avoid damage to the receiver. The devices are designed for mounting on a DIN rail, enabling space-saving installation in enclosures. Certifications include EMC standards such as EN 55032/35, CISPR 32, and FCC Part 15B, as well as immunity tests according to IEC 61000-4-2 to 4-11. Safety standards EN 60950-1 and UL 60950-1, as well as vibration test standard IEC 60068-2-6, guarantee reliability under industrial conditions.

Mounting and Installation

Mounting is done via a DIN rail, allowing the converter to be quickly and securely integrated into existing enclosures. The compact design with dimensions of 30 x 125 x 79 mm and a weight of 170 g enables space-saving installation. The power supply terminals are implemented as a terminal block, ensuring a mechanically stable and secure connection. Installation requires no additional tools, as configuration is done via DIP switches.

Operational Advantages

The IMC-21A-S-SC offers high operational reliability through integrated protection functions against reverse polarity and overcurrent. The long service life of 353,000 hours (MTBF according to MIL-HDBK-217F) and the 5-year manufacturer's warranty underscore the reliability of the device. The simple configuration via DIP switches and the robust construction make the converter a low-maintenance solution for industrial networks. The support for single-mode fiber with a range of up to 40 km enables connections over long distances without requiring additional amplifiers or intermediate stations.

Scope of Delivery

The scope of delivery includes the IMC-21A-S-SC media converter, a quick installation guide, and a warranty card.