Avantalk
Avantalk RS232 to RS485 RS422 Isolated Converter UT-208
Converts RS-232 to RS-485 or RS-422 with optical isolation, 300 bps to 115.2 Kbps baud rates, 5000 m range at 9600 bps, and 600 W surge protection per line
- Automatic data direction control for real TXD/RXD/GND communication
- Baud rate range 300-115.2Kbps with 5000m distance at 9600bps
- RS-232 interface has +/-15KV ESD protection and RS-422/485 has 600W surge protection per line
- Asynchronous half-duplex RS485 or full-duplex RS422 working modes
- Works with all communication software via plug & play
Industrial serial converter for legacy equipment
The Avantalk UT-208 bridges RS-232 devices to RS-485 or RS-422 networks using automatic data-direction control and true TXD/RXD/GND signalling. It supports asynchronous half-duplex on RS-485 and full-duplex on RS-422, making it suitable for industrial automation, building management and point-of-sale systems that still rely on serial links. The adapter operates across all major operating systems without proprietary drivers.
Sustained isolation and surge protection for long
Optical isolation on every line protects the host port from ground loops and transient voltages during continuous operation. The RS-232 side withstands ±15 kV ESD events while each RS-422/485 line absorbs 600 W of surge energy, allowing reliable communication over distances up to 5 000 m at 9 600 bps. Baud rates from 300 to 115.2 Kbps are maintained without software intervention once the link is established.
Verify connector gender
Confirm that your existing RS-232 port uses a standard DB-9 pin-out matching the converter's TXD, RXD and GND pins so no gender changer or null-modem cable is required. Ensure the RS-485/422 bus is terminated with the correct resistor value at each end to prevent signal reflections on runs approaching the maximum distance. Check that your application can operate in half-duplex mode if you select the RS-485 wiring scheme.
Highlights
- Automatic data direction control for real TXD/RXD/GND communication
- Baud rate range 300-115.2Kbps with 5000m distance at 9600bps
- RS-232 interface has +/-15KV ESD protection and RS-422/485 has 600W surge protection per line
- Asynchronous half-duplex RS485 or full-duplex RS422 working modes
- Works with all communication software via plug & play
Specifications
No published specifications for this item yet.
Questions about this item
Does the UT-208 generate noticeable heat or draw much power during continuous all-day operation?
The UT-208 is a passive isolated converter with no active cooling or power-hungry components, so it runs cool and draws negligible power during continuous use.
What existing port or interface must my computer already have to connect this converter?
Your system needs a standard RS-232 serial port (DB-9 or equivalent) to plug the UT-208 directly into the TXD/RXD/GND lines.
Will the UT-208 work reliably alongside legacy RS-422 or RS-485 devices that only run at 9,600 bps over long cables?
Yes — it supports 9,600 bps up to 5,000 m on the RS-422/RS-485 side and provides 600 W per-line surge protection for robust mixed-vintage installations.
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