General
Overcurrent protection

The Moxa TCF-142 is a media converter that extends serial RS-232/422/485 signals over fiber optic links. It enables secure and interference-free data transmission in industrial environments where high EMC requirements and long transmission distances exist. The device allows connection of serial devices over distances of up to 40 km with singlemode and 5 km with multimode fiber optic cable, transmitting signals via optical links to avoid electromagnetic interference. The converters are designed for use in point-to-point or ring topologies to ensure high network availability.

Applications

The TCF-142 is suitable for industrial applications where serial devices need to be connected over long distances, for example in automation technology, power supply, or transportation technology. Its robust design and IP30 protection rating make it suitable for indoor use where mechanical stress and environmental conditions such as dust or splashing water may occur. The availability of models with an extended temperature range (–40 to 75 °C) expands its use in climatically demanding environments.

Functions and Equipment in Detail

The device features two serial ports, each supporting one of the standards RS-232, RS-422, or RS-485, but not simultaneously. Baud rates can be automatically detected and range from 50 bps to 921.6 kbps. For RS-485 applications, a hardware-controlled data direction control (ADDC) is used, enabling correct communication without additional control logic. Signal types are clearly defined: RS-232 with TxD, RxD, GND; RS-422 with Tx+/Tx–, Rx+/Rx–, GND; RS-485 2-wire with Data+/Data–, GND; RS-485 4-wire with Tx+/Tx–, Rx+/Rx–, GND.

Technology Explained Simply

The fiber optic interface uses either multimode or singlemode technology, with range depending on the fiber type. With multimode, the maximum range is 5 km; with singlemode, it is 40 km. Typical wavelengths are 850 nm (multimode) and 1310 nm (singlemode). TX power is 0 to –5 dBm, RX sensitivity is 0 to –20 dBm (multimode) or 0 to –25 dBm (singlemode). The link budget is 15 dB (multimode) and 20 dB (singlemode), indicating the maximum attenuation in the transmission channel. The optical interface is connected via a 7-pin terminal block.

Compatibility and Accessories

The TCF-142 is designed for use with standard fiber optic cables, with selection between multimode and singlemode depending on requirements. The serial interfaces are compatible with common industrial standards. Power supply is via 12 to 48 VDC, with integrated reverse polarity and overcurrent protection. Power supply is via a terminal block. The devices are designed for wall mounting and can be placed on a rubber stand foot.

Mounting and Installation

Mounting is done via a wall bracket included in the delivery. Connections for the serial interfaces and power supply are made via terminal blocks, ensuring a secure and mechanically stable connection. The optical interface is connected via the 7-pin terminal block.

Operational Advantages

The TCF-142 offers high operational reliability through the use of fiber optic technology, which is immune to electromagnetic interference. Automatic baud rate detection and hardware-controlled data direction control (ADDC) reduce configuration effort. The robust metal housing with IP30 protection class protects against mechanical impacts and environmental conditions. The high MTBF of 780,480 hours (Telcordia standard) demonstrates the device's reliability. Certifications according to EN 55032/35, CISPR 32, FCC Part 15B Class A, IEC 61000-4-2 to 4-8, UL 60950-1, and IEC 60068-2-6 confirm compliance with international standards.

Scope of Delivery

The scope of delivery includes 1 x TCF-142 media converter, 1 x rubber stand foot, 1 x quick start guide, and 1 x warranty card.