https://wiki.jw-tech.eu/index.php?action=history&feed=atom&title=WSAL23376_%E2%80%93_RS232_TO_RS485_%28B%29%2FenWSAL23376 – RS232 TO RS485 (B)/en - Versionsgeschichte2026-10-23T23:04:06ZVersionsgeschichte dieser Seite in JW Tech WikiMediaWiki 1.43.9https://wiki.jw-tech.eu/index.php?title=WSAL23376_%E2%80%93_RS232_TO_RS485_(B)/en&diff=2954&oldid=prevJWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex2026-09-07T01:38:05Z<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 RS232 TO RS485 (B) is an active, digitally isolated bi-directional serial converter. It converts RS232 signals into balanced differential RS485 signals and supports reliable transmission at 300–115200 bps. The unit features integrated 600 W lightning/surge protection, a switchable 120 Ω termination resistor, and DIN-rail mounting for industrial use.<br />
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== Related products at JW Tech ==<br />
* [https://shop.jw-tech.eu/p/WSAL23376 WSAL23376 – RS232 To RS485 Converter, Active Digital Isolator, Rail-Mount support, 600W Lightningproof &amp;amp; Anti-Surge, Multi-isolation protection]<br />
* [https://shop.jw-tech.eu/p/WSAL27830 WSAL27830 – RS232 To RS485 Converter, Active Digital Isolator, Rail-Mount support, 600W Lightningproof &amp;amp; Anti-Surge, Multi-isolation protection]<br />
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== Technical overview ==<br />
* Active digital isolation with integrated power-supply and signal isolation; no external power supply needed for the isolated terminal.<br />
* Supply voltage: 6–36 V DC via screw terminals; reverse-polarity protection included.<br />
* Reliable communication range: 300–115200 bps; maximum rate can reach 921600 bps, but only the recommended range is considered stable.<br />
* RS232 side: screw terminals, point-to-point half-duplex, range approx. 15 m.<br />
* RS485 side: screw terminals, point-to-multipoint (up to 32 nodes; repeater recommended beyond 16 nodes), range approx. 1200 m.<br />
* Integrated TVS suppresses voltage spikes; additional resettable fuse and protection diodes provide over-current and over-voltage protection.<br />
* Optional 120 Ω termination resistor on the RS485 side, enabled by a switch; recommended to enable at the start and end points of the bus segment.<br />
* ABS DIN-rail-mount case, dimensions L×W×H: 91.6 × 23.3 × 58.7 mm; operating temperature −15 °C to +70 °C.<br />
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== Notes and version constraints ==<br />
* RS485 is half-duplex: simultaneous sending and receiving is not possible; observe test sequence.<br />
* Correct GND wiring depends on the application: in simple scenarios without a shared reference or interference risk, GND may remain unconnected; in complex systems with high signal-integrity requirements, connect GND according to specification.<br />
* If malfunction occurs: verify supply voltage with a multimeter (6–36 V), check TXD/RXD cross-wiring, connect RS485 A-A/B-B correctly; the 120 Ω resistor is off by default.<br />
* The module does not support direct Modbus read/write or protocol conversion; it only performs transparent data forwarding at the physical layer.<br />
* Beyond 16 RS485 nodes, using a repeater is recommended to ensure reliability.<br />
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== Source and revision record ==<br />
* [https://www.waveshare.com/wiki/RS232_TO_RS485_(B) RS232 TO RS485 (B) - Waveshare Wiki]<br />
* Source revision: 88232<br />
* Captured: 2026-09-04T02:53:25+00:00<br />
* SHA-256: <code>2de1fe6abac271de912c6d721b86757f25ec953f038dec2123f17b8485785548</code></div>JWTechPublisher