General
Number of serial ports	2
RS-485 termination resistors	N/A, 120 Ω, 120 kΩ
Air humidity	5–95 % nicht kondensierend
MTBF	792.085 Stunden (Telcordia Standard)

The ICF-1150-M-ST-T from Moxa is an industrial media converter that connects serial RS-232/422/485 interfaces with multimode fiber optic transmission via ST connectors. The device is designed for signal transmission in harsh industrial environments where high mechanical stress, extreme temperatures, and electromagnetic interference are prevalent. It enables the connection of serial devices over long distances with high signal integrity and galvanic isolation, making it suitable for applications in automation, power supply, or transportation technology.

Applications
This converter is designed for use in industrial environments requiring high reliability and environmental resistance. The operating temperature range of -40 to 85 °C makes it suitable for outdoor use or machine rooms with significant temperature fluctuations. Certification to UL/cUL Class I Division 2 and ATEX Zone 2 extends its application to hazardous areas with explosion risks. The robust metal housing construction with IP30 protection rating safeguards against mechanical impacts and limited dust and splash water ingress.

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 transmission rates. Signal assignment is done via a 5-pin terminal block, with assignments defined according to interface type (TxD/RxD/GND, Tx+/−/Rx+/−/GND, Data+/−/GND). For RS-485, an automatic data direction control (ADDC) is integrated, enabling communication without additional control lines. Configurable termination resistors (N/A, 120 Ω, 120 kΩ) and pull-up/pull-down resistors (e.g. 150 kΩ, 10 kΩ, 4.7 kΩ, 3.3 kΩ, 1 kΩ, 909 Ω, 822 Ω, 770 Ω, 500 Ω, 485 Ω) facilitate adaptation to different systems.

Technology Explained Simply
The galvanic isolation of 2 kV protects connected devices from voltage spikes and prevents short circuits between different potentials. This is particularly important in industrial plants where different devices often operate at different ground potentials. Multimode fiber optic transmission via ST connectors enables stable transmission over long distances with minimal signal attenuation. Power supply is via a 12 to 48 VDC input, connected through a terminal block. Integrated protection against reverse polarity and overcurrent enhances operational safety.

Compatibility and Accessories
The converter is designed for connecting serial devices to fiber optic networks. Use of multimode fiber with ST connectors requires compatible cables and connectors. Configuration of termination and pull resistors allows adaptation to various serial bus topologies, especially in RS-485 networks. DIN rail mounting enables flexible installation in enclosures.

Mounting and Installation
The device is mounted on a DIN rail, enabling quick and secure installation in standard enclosures. Connections are made via a 5-pin terminal block for serial interfaces and a separate terminal block for power supply. Mounting requires no special tools; wiring is done using screw terminals.

Operational Advantages
The combination of galvanic isolation, wide operating temperature range, robust metal housing, and integrated protection functions ensures high operational safety. Automatic data direction control (ADDC) reduces configuration complexity in RS-485 networks. The high MTBF of 792,085 hours (according to Telcordia standard) demonstrates the device's high reliability. Certifications to EN 55032/35, CISPR 32, FCC Part 15B Class A, IEC 61000-4-2 to -4-8, and UL 61010-2-201 guarantee compliance with international standards for EMC, safety, and environmental resistance.