https://wiki.jw-tech.eu/index.php?action=history&feed=atom&title=WSAL23949_%E2%80%93_USB_TO_RS485_%E2%80%93_422%2FenWSAL23949 – USB TO RS485 – 422/en - Versionsgeschichte2026-10-23T21:52:02ZVersionsgeschichte dieser Seite in JW Tech WikiMediaWiki 1.43.9https://wiki.jw-tech.eu/index.php?title=WSAL23949_%E2%80%93_USB_TO_RS485_%E2%80%93_422/en&diff=2785&oldid=prevJWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex2026-09-06T07:56:18Z<p>Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex</p>
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'''Documentation notice:''' This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.<br />
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== Summary ==<br />
The USB to RS485/RS422 converter is an industrial-grade isolated device featuring FT232RNL and SP485EEN chips. It supports baud rates from 300 bps to 3 Mbps, provides automatic direction control, and includes multiple protection circuits.<br />
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== Related products at JW Tech ==<br />
* [https://shop.jw-tech.eu/p/WSAL23949 WSAL23949 – USB to RS485/422 Industrial Grade Isolated Converter, Onboard Original FT232RL and SP485EEN, Multiple Protection]<br />
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== Technical overview ==<br />
* Enclosure: Industrial rail-mount ABS case, suitable for 35mm DIN rail<br />
* Dimensions: 81.9 × 54.0 × 32.0 mm<br />
* USB port: USB-B connector, powered at 5V<br />
* Transmission distance: About 1200m at low baud rates<br />
* RS485 interface: A+, B-, PE; RS422 interface: TA, TB, RA, RB, PE<br />
* Automatic hardware direction control without manual intervention<br />
* Protection circuits: TVS, self-recovery fuse, ESD protection (15kV), lightning/surge protection (600W)<br />
* Two converter units are required for testing<br />
* LEDs: PWR (red) indicates power, TXD (green) indicates transmitting, RXD (blue) indicates receiving<br />
* Operating temperature: -15°C to 70°C<br />
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== Notes and version constraints ==<br />
* The source contains contradictory statements about the 120Ω resistor: The “120R Matching Resistor Setting Description” section says it is disabled by default, while the FAQ answers state it is enabled by default. Please verify the actual jumper state on-site.<br />
* The source page references external links to drivers and files that are not included in the source. Exact download paths must be confirmed manually.<br />
* Exact driver installation requires access to the official FTDI driver portal, which is not available in the source file.<br />
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== Source and revision record ==<br />
* [https://www.waveshare.com/wiki/USB_TO_RS485/422 USB TO RS485/422 - Waveshare Wiki]<br />
* Source revision: 108980<br />
* Captured: 2026-09-04T03:37:53+00:00<br />
* SHA-256: <code>18f90798d06ffb094852d1cf1062e71ba0255af19fbc479ea48ae46cf2e48bdb</code></div>JWTechPublisher