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The TCF-142 media converters feature a multiple interface circuit. This circuit handles RS-232 or RS-422/485 serial interfaces and multi-mode or single-mode fiber.
These converters extend serial transmission significantly:
You can configure the converters for either RS-232 signals or RS-422/485 signals. However, they cannot handle both signal types simultaneously.
The converters automatically detect the serial baudrate. This feature provides extreme convenience. Even when you change a device’s baudrate, the signal transmits through the media converter without data loss.
You can connect serial devices to a fiber ring using these converters. To form the ring, connect one unit’s Tx port to a neighboring converter’s Rx port. Once you set up the ring, configure the converters for ring mode using the DIP switches.
When one node transmits a signal, the signal travels around the ring. The signal continues until it returns to the transmitting unit, which then blocks it. You can set up fiber rings with a total circumference of up to 100 km.
Automatic Data Direction Control (ADDC) is a hardware data flow solution that Moxa developed. ADDC handles RS-485 data direction control by sensing and controlling RS-485 data direction automatically. This eliminates the need to use handshaking signals.
Optical Fiber
| Low-Speed Fiber Module | Multi-Mode | Single-Mode | |
| Fiber Cable Requirements | 50/125 µm, 800 MHz | G.652 | |
| 62.5/125 µm, 500 MHz | |||
| Typical Distance | 5 km | 40 km | |
| Wavelength | Typical (nm) | 850 | 1310 |
| TX Range (nm) | 840 to 860 | 1290 to 1330 | |
| RX Range (nm) | 800 to 900 | 1100 to 1650 | |
| Optical Power | TX Range (dBm) | 0 to -5 | 0 to -5 |
| RX Range (dBm) | 0 to -20 | 0 to -25 | |
| Link Budget (dB) | 15 | 20 | |
| Dispersion Penalty (dB) | 1 | 1 | |
| Note: When using a power meter to measure the fiber TX power, set the baudrate to 9,600 bps and send data (00, …, 0h) to the serial converter’s serial port. | |||
12 to 48 VDC
