General
Number of serial ports	2 Stück
Range	40 km
Wavelength	1310 nm
Dispersion penalty	1 dB

The TCF-142-S-SC from Moxa is an industrial serial-to-fiber converter that converts RS-232/422/485 signals into fiber optic transmission signals. It is specifically designed for applications requiring high immunity to interference and long transmission distances. The device enables data transmission over distances of up to 40 km in singlemode operation, with the connection realized via a fiber optic cable at a wavelength of 1310 nm. The converters are designed for use in industrial environments that must be insensitive to electromagnetic interference, voltage differences, and chemical corrosion. The robust metal housing with protection rating IP30 provides mechanical protection and is intended for wall mounting.

Applications
The TCF-142-S-SC is suitable for industrial communication applications requiring reliable, interference-free data transmission over long distances. This includes, for example, networking machines in production facilities, communication between distributed control systems, or connecting sensors and actuators in large-scale installations. Support for point-to-point connections as well as ring topologies expands its usability in redundant networks. The high immunity to interference also makes the device suitable for environments with strong electromagnetic fields.

Functions and Equipment in Detail
The converter features two serial ports, each supporting one of the standards RS-232, RS-422, or RS-485 — but not simultaneously. The baud rate can be automatically detected and ranges from 50 bps to 921.6 kbps, with support for non-standard transmission rates as well. For RS-485 applications, the ADDC (Automatic Data Direction Control) function is integrated, which automatically controls data direction. Termination can be set to 120 Ohm, 120 kOhm, or disabled (N/A). The serial connections are made via a 7-pin terminal block. Latency is 300 ns, which is sufficient for time-critical applications.

Technology Explained Simply
The fiber optic transmission operates in singlemode mode at a wavelength of 1310 nm, enabling a maximum range of 40 km. The TX power ranges from 0 to -5 dBm, and the RX reception range is from 0 to -25 dBm. The link budget is 20 dB, ensuring sufficient signal reserve for transmission over long distances. The dispersion penalty is 1 dB, maintaining signal quality across the entire distance. Power supply is via a terminal block with a voltage of 12 to 48 VDC. Power consumption ranges from 70 to 140 mA. Protection features such as overcurrent protection and reverse polarity protection ensure a safe operating environment.

Compatibility and Accessories
The TCF-142-S-SC is designed for use in industrial networks and can be combined with other devices from the TCF-142 series to create point-to-point connections or ring topologies. The connection is made via singlemode fiber optic cable with SC connectors. The devices are designed for operation in an extended temperature range of -40 to 75 °C, making them suitable for use in harsh environments. Storage is possible at temperatures from -40 to 85 °C and humidity levels from 5 to 95 % (non-condensing).

Mounting and Installation
Mounting is done on a wall using the integrated mounting ears. The housing dimensions are 90 x 100 x 22 mm (with ears) or 67 x 100 x 22 mm (without ears), and it weighs 320 g. Installation requires connecting the serial interface via the terminal block and connecting the power supply. The fiber optic cable is connected to the SC connector. Configuration is done using the quick start guide, which is included in the delivery.

Operational Advantages
The TCF-142-S-SC offers high reliability through fiber optic transmission, which is immune to electromagnetic interference. Automatic baud rate detection and the ADDC function for RS-485 reduce configuration effort. The robust construction with metal housing and IP30 protection rating ensures stable operation in industrial environments. The long service life, with an MTBF of 780,480 hours (Telcordia standard), and certifications according to EN 55032/35, CISPR 32, FCC Part 15B Class A, as well as IEC 61000-4-2 to 4-8, underscore the quality of the device. The delivery includes the converter, a rubber stand foot, a quick start guide, and a warranty card.