General
Number of serial ports	2
Air humidity	5–95 % (nicht kondensierend)
MTBF	792.085 Stunden (nach Telcordia GB)

The ICF-1150I-M-ST-T from Moxa is an industrial media converter that connects serial data transmission over RS-232/422/485 interfaces with fiber optic communication. It serves as a bridge between conventional serial devices and fiber optic networks, enabling reliable, interference-resistant data transmission over long distances. The device is specifically designed for use in demanding industrial environments where high mechanical stress, extreme temperatures, and electromagnetic interference are common. The integrated galvanic isolation of 2 kV protects connected devices from voltage spikes and potential differences, enhancing system stability.

Applications
This converter is suitable for applications in manufacturing automation, power supply, transportation, and other industrial sectors where serial devices such as sensors, controls, or measuring instruments need to be integrated into a network via fiber optic. Its robust construction and extended operating temperature range of -40 to 85 °C also make it suitable for outdoor use or in rooms with extreme climatic conditions. Mounting is done on a DIN rail, enabling flexible integration into existing enclosures.

Functions and Features in Detail
The device features two serial ports supporting RS-232, RS-422, and RS-485 standards (in 2- and 4-wire technology). The baud rate can be set between 50 bps and 921.6 kbps, including non-standard values. Automatic data direction control (ADDC) simplifies communication in RS-485 mode by detecting data direction without additional control lines. For adapting to various systems, flexible resistance options are available: pull-up/pull-down resistors in various values (e.g. 150 kΩ, 10 kΩ, 4.7 kΩ) as well as terminator resistors (120 Ω, 120 kΩ) or no terminator (N/A). Signal assignment is clearly defined: RS-232 (TxD, RxD, GND), RS-422 (Tx+, Tx−, Rx+, Rx−, GND), RS-485-4w (Tx+, Tx−, Rx+, Rx−, GND), and RS-485-2w (Data+, Data−, GND).

Technology Explained Simply
The converter converts serial signals into optical signals transmitted over multimode fiber optic cable. The ST connector enables a secure and mechanically stable connection. The galvanic isolation of 2 kV protects connected devices from electrical disturbances caused by potential differences or overvoltage. Power supply is via a terminal block with an input voltage of 12 to 48 VDC. Maximum current consumption is 300 mA. Reverse polarity protection and overcurrent protection provide additional safety for power supply.

Compatibility and Accessories
The ICF-1150I-M-ST-T is designed for use with multimode fiber optic cables with ST connectors. The serial interfaces are universally applicable and compatible with a wide range of industrial devices supporting RS-232/422/485. Configuration is done via hardware settings on the device, without requiring additional software or configuration tools.

Mounting and Installation
Mounting is done on a DIN rail, enabling quick and secure installation in standard enclosures. Connections for the serial interfaces and power supply are made via a 5-pole terminal block. The fiber optic cable connection is established via the ST connector. Installation requires no special tools, and cabling follows standard industrial practices.

Operational Advantages
The converter offers high reliability due to galvanic isolation and robust construction. The operating temperature range of -40 to 85 °C enables use in extreme environments. Integrated EMC and EMS compliance (EN 55032/35, CISPR 32, FCC Part 15B Class A, IEC 61000-4-2 to -4-8) ensures stable operation in electromagnetically stressed environments. Certification to UL 61010-2-201 and explosion protection approval (UL/cUL Class I Div. 2 Groups A/B/C/D, ATEX Zone 2) extends the application range to hazardous areas. The MTBF is 792,085 hours according to Telcordia GB, indicating high service life. Warranty is 5 years.

The housing is made of metal and provides IP30 protection. Dimensions are 30.3 × 70 × 115 mm, weight is 330 g. Storage and operating temperatures are identical, from -40 to 85 °C, and humidity is between 5 and 95 % (non-condensing). Environmental tests according to IEC 60068-2-1/-2/-3 and vibration testing according to IEC 60068-2-6 confirm mechanical robustness.