The ICF-1170I-M-ST from Moxa is an industrial media converter that converts CANbus signals into fiber optic transmission signals. It is designed for secure and interference-free data transmission in automation systems, particularly in environments with electromagnetic interference or over long distances. The device connects CAN networks with fiber optic infrastructures, thereby extending the transmission range while maintaining signal integrity. The conversion is performed via a multimode ST fiber optic connector, designed for 100BaseFX connections. The galvanic isolation of 2 kV protects the CAN communication from voltage spikes and potential differences between connected devices.

CANbus-to-fiber optic converter

The converter features a single CAN port with signals CAN_L, CAN_H, and CAN Signal GND. The termination resistors can be configured via a DIP switch, with a 120-ohm resistor available. This configurability allows adaptation to different network topologies and prevents signal reflections. The integrated isolation ensures reliable separation between the CAN bus and the fiber optic network, which is particularly beneficial in industrial environments with high interference.

Functions and equipment in detail

The device offers two redundant DC power inputs, connected via a terminal block. The operating voltage ranges from 12 to 48 VDC, with a current consumption of 221 mA. The power supply supports overcurrent protection, enhancing the safety of the device and connected components. The robust construction with a metal housing and protection rating IP30 ensures protection against solid foreign objects and provides sufficient mechanical stability for use in industrial environments.

Technology explained simply

The converter uses multimode fiber optic technology with an ST connector, suitable for short to medium transmission distances in industrial applications. The 100BaseFX transmission rate enables data transfer at 100 Mbit/s, which is sufficient for most CAN applications. The galvanic isolation of 2 kV protects against electrical interference and potential differences that may occur when connecting different devices. The DIP switches allow for easy configuration of the termination resistor without requiring additional tools or software.

Compatibility and accessories

The ICF-1170I-M-ST is designed for use in industrial automation systems, particularly in environments where CAN bus systems need to be connected to fiber optic networks. Compatibility with 100BaseFX multimode fiber and support for 12 to 48 VDC make it flexible for various applications. The use of ST connectors enables easy integration into existing fiber optic infrastructures.

Mounting and installation

The device is mounted on a DIN rail, enabling standardized and secure installation in enclosures. Mounting requires no additional tools, as the DIN rail provides the fastening. Dimensions are 30.3 × 70 × 115 mm, allowing the converter to fit in standard enclosure installations. The mounting design ensures easy access to connections.

Advantages in operation

The operating temperature range of 0 to 60 °C makes the converter suitable for indoor use where ambient temperatures remain within these limits. The storage temperature of -40 to 85 °C allows safe storage even under extreme conditions. The humidity range of 5 to 95 % (non-condensing) is typical for industrial environments. Certifications according to EN 55032/35, CISPR 32, FCC Part 15B Class A, IEC 61000-4-2 to -4-8, EN 62368-1, and UL 508 ensure compliance with applicable standards for electromagnetic compatibility, safety, and environmental testing. The MTBF is 792,085 hours according to Telcordia/Bellcore, indicating high reliability. The manufacturer’s warranty covers 5 years.