TCF-142 Series Serial Media Converters > Serial Media Converters 14-14 www. m oxa. com 14 TCF-142 Series RS-232/422/485 to fiber converters The TCF-142 media converters are equipped with a multiple interface circuit that can handle RS-232 or RS-422/485 serial interfaces and multi-mode or single-mode fiber. TCF-142 converters are used to extend serial transmission up to 5 km (TCF-142-M with multi-mode The TCF-142 converters can automatically detect the serial baudrate. This is an extremely convenient feature. Even if a device’s baudrate The TCF-142 converters can be used to connect serial devices to a fiber ring. To form the ring, connect the Tx port of one TCF-142 to the Rx port of a neighboring converter. Once the ring is set up, simply use the DIP switches to configure the TCF-142 converters for “ring mode.” When one node transmits a signal, the signal travels around the ring until it returns back to the transmitting unit, which then blocks the signal. With the TCF-142, you can set up fiber rings that have a total circumference of up to 100 km. fiber) or up to 40 km (TCF-142-S with single-mode fiber). The TCF-142 converters can be configured to convert either RS-232 signals, or RS- 422/485 signals, but not both at the same time. is changed, the signal will still be transmitted through the media converter without any data loss. Introduction Ring Operation Automatic Baudrate Detection Automatic Data Direction Control (ADDC®) ADDC® is a patented hardware data flow solution developed by Moxa to handle RS-485 data direction control. ADDC® senses and controls RS-485 data direction automatically, making it unnecessary to use the handshaking signal. › ›“Ring” and “Point- to-Point” transmission › ›Extends RS-232/422/485 transmission up to: • 40 km with single-mode—TCF-142-S • 5 km with multi-mode—TCF-142-M › ›Decreases signal interference › ›Protects against electrical interference and chemical corrosion › ›Supports baudrates up to 921.6 kbps › ›Wide temperature range models available (-40 to 75°C) RS-232 RS-485 RS-422 RS-485 TCF-142 TCF-142 TCF-142 Tx Tx Tx Tx Rx Rx Rx Rx TCF-142