General
Number of serial ports	2
Air humidity	5–95 % (nicht kondensierend)

The ICF-1150-S-ST from Moxa is an industrial media converter that connects serial interfaces RS-232, RS-422, and RS-485 with a fiber optic network via singlemode connection. The device enables transmission of serial data over long distances through optical fiber, making it suitable for applications in automation technology, factory control, and transportation. The design allows for flexible integration into existing systems, particularly through support for non-standard baud rates and automatic data direction control (ADDC) for RS-485, which enables easy adaptation to different device configurations.

Applications

The converter is designed for industrial environments where reliable, interference-free data transmission over long distances is required. Typical use cases include connecting control devices, sensors, PLCs, or other serial end devices to a fiber optic network, for example in production facilities, traffic control systems, or power supply networks. The robust construction and certification for explosion protection (ATEX Zone 2, UL/cUL Class I Div. 2) extend the application range to potentially explosive areas.

Functions and Equipment in Detail

The device features two serial ports that can be configured as RS-232, RS-422, or RS-485 (in 2- or 4-wire technology) depending on requirements. The baud rate can be set between 50 bps and 921.6 kbps, including support for non-standard values. The serial connections are made via a 5-pin terminal block, while the fiber optic side connects via an ST connector (singlemode). The automatic data direction control (ADDC) for RS-485 reduces the need for manual settings and simplifies integration into existing RS-485 networks.

Technology Explained Simply

The ICF-1150-S-ST converts serial signals into optical signals transmitted over fiber optic cables. This enables transmission over distances that would be limited with copper cables due to signal loss or interference. The use of singlemode fiber optic ensures high bandwidth and low attenuation, which is advantageous for long distances. Power supply is via a terminal block in the range of 12 to 48 VDC, with integrated protection functions such as reverse polarity protection and overcurrent protection enhancing reliability. The operating temperature of 0 to 60 °C and storage temperature of -40 to 85 °C make the device suitable for a wide range of environments.

Compatibility and Accessories

The device is compatible with a wide range of serial devices supporting RS-232, RS-422, or RS-485. Signal assignment is standardized: RS-232 (TxD, RxD, GND), RS-422 (Tx+/-, Rx+/-, GND), RS-485-4w (Tx+/-, Rx+/-, GND), and RS-485-2w (Data+/-, GND). The RS-485 resistors can be selected according to application (Terminator: N/A, 120 Ω, 120 kΩ; Pull High/Low: 150 kΩ, 10 kΩ, 4.7 kΩ, 3.3 kΩ, 1 kΩ, 909 Ω, 822 Ω, 770 Ω, 500 Ω, 485 Ω) to ensure signal integrity. Certifications according to EN 55032/35, CISPR 32, FCC Part 15B Class A, IEC 61000-4-2 to -4-8, UL 61010-2-201, IEC 60068-2-1/-2/-3, UL/cUL Class I Div. 2 Groups A/B/C/D, ATEX Zone 2, and IEC 60068-2-6 guarantee compliance with international standards for EMC, safety, environmental resistance, and vibration testing.

Mounting and Installation

Mounting is done via a DIN rail, enabling easy integration into existing enclosures. The housing is made of metal and provides IP30 protection, safeguarding against access by solid foreign objects larger than 2.5 mm. Dimensions are 30.3 × 70 × 115 mm, weight 330 g. Power supply is via a terminal block, with connections clearly marked. Installation requires no special tools; wiring is done via the terminal blocks and the ST connector.

Operational Advantages

The ICF-1150-S-ST offers high reliability due to its robust construction and integrated protection functions. The long service life (MTBF: 792,085 hours according to Telcordia standard) and 5-year warranty underline the quality. The flexible configuration of serial interfaces and support for non-standard baud rates increase adaptability to different systems. Fiber optic transmission ensures high interference immunity and enables long transmission distances without signal loss.