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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.		'''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.

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			[[File:JWTech-Wiki-preview-55a4d4aaa2f4dc7414529d2f906e7c9ab74961cdf739ec600b7a5cfc04287eed.jpg\|thumb\|right\|320px\|alt=Product view Industrial serial server, RS485 to RJ45 Ethernet, TCP/IP to serial, rail-mount support, with POE function(optional)\|Industrial serial server, RS485 to RJ45 Ethernet, TCP/IP to serial, rail-mount support, with POE function(optional)]]
			'''Catalog location in the JW Tech Shop:'''
			* WSAL20978 – Industrial serial server, RS485 to RJ45 Ethernet, TCP/IP to serial, rail-mount support, with POE function(optional): Other products
			* WSAL23273 – Industrial serial server, RS485 to RJ45 Ethernet, TCP/IP to serial, rail-mount support, with POE function(optional): IoT / Communication → Wired Comm / Converter → Ethernet TO UART / RS232 / RS485
			* WSAL30303 – Industrial serial server, RS485 to RJ45 Ethernet, TCP/IP to serial, rail-mount support, with POE function(optional): Other products
			<!-- JWTECH-WIKI-MEDIA-CATALOG:END -->

	== Summary ==		== Summary ==

JWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex

2026-08-29T21:05:45Z

Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex

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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.

== Summary ==
The device is an industrial serial server that forwards RS485 data over Ethernet. The PoE variant supports power via the PoE port or a terminal block (6–36 V) and provides electrical isolation.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/WSAL20978 WSAL20978 – Industrial serial server, RS485 to RJ45 Ethernet, TCP/IP to serial, rail-mount support, with POE function(optional)]
* [https://shop.jw-tech.eu/p/WSAL23273 WSAL23273 – Industrial serial server, RS485 to RJ45 Ethernet, TCP/IP to serial, rail-mount support, with POE function(optional)]
* [https://shop.jw-tech.eu/p/WSAL30303 WSAL30303 – Industrial serial server, RS485 to RJ45 Ethernet, TCP/IP to serial, rail-mount support, with POE function(optional)]

== Technical overview ==
* Two hardware versions: RS485 TO ETH (B) with standard RJ45 and 9–24 V; RS485 TO POE ETH (B) with PoE port, 6–36 V at the terminal block, and electrical isolation.
* Interfaces: 1× isolated RS485 port and 1× Ethernet port (10/100 Mbps, RJ45).
* UART parameters: baud rate 300–115200 bps, 5–9 data bits, parity: none, odd, even, mark, space; no flow control.
* Operating modes: TCP server (up to 30 connections), TCP client (up to 7 destination IPs), UDP, and UDP multicast.
* Protocols: Ethernet, IP, TCP, UDP, HTTP, ARP, ICMP, DHCP, DNS.
* Configuration via web browser, DHCP for dynamic IP assignment, and DNS resolution.
* Advanced features: Modbus gateway (RTU to TCP), MQTT gateway, JSON-to-Modbus RTU/645 meter, HTTP GET/POST data submission, NTP time sync, heartbeat and registration packets.
* Dimensions: 87 × 36 × 59 mm, operating temperature −40 °C to 85 °C, humidity 5–95% RH.

== Notes and version constraints ==
* The source contains template placeholders (e.g., {{{name3}}}, {{{userDefinedInfo}}), indicating incomplete templates; some details may be incomplete.
* Exact firmware version and last-updated date are not stated in the source; version-sensitive steps require manufacturer confirmation.
* The FAQ notes that the web configuration file set can be overwritten by firmware updates; recovery requires downloading a separate ZIP file whose exact name and URL are incompletely provided in the source.
* No prices, certifications, or warranty terms are present in the source; such claims must not be invented.

== Source and revision record ==
* [https://www.waveshare.com/wiki/RS485_TO_POE_ETH_(B) RS485 TO POE ETH (B) - Waveshare Wiki]
* Source revision: 96492
* Captured: 2026-08-29T08:16:08+00:00
* SHA-256: <code>ccb8bcb92aafe808ae8b901592be4dc2f01ed82ac515fe87adf2574eccd35b18</code>

WSAL20978 – RS485 TO POE ETH (B)/en - Versionsgeschichte

JWTechPublisher: Freigegebenes Produktbild und Katalogposition ergänzt

JWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex