Quelltext der Seite WSAL21967 – RS485 TO LTE CAT4 (EU)/en

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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 ==
Industrial 4G DTU with an RS485 interface and LTE CAT4 modem for EMEA, Korea, Thailand, India and Southeast Asia. DIN rail mount.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/WSAL21967 WSAL21967 – Industrial 4G DTU, RS485 TO LTE CAT4, DIN Rail-Mount, for EMEA, Korea, Thailand, India, Southeast Asia]

== Technical overview ==
* The device is an industrial 4G data terminal (DTU) that relays RS485 data over an LTE CAT4 network.
* It is intended for the regions EMEA, Korea, Thailand, India and Southeast Asia.
* Mounting is via a DIN rail (Hutschienenmontage).
* The wiki lists related products such as UART TO ETH, RS232/485 TO ETH, etc.
* Configuration software tools are provided: SSCOM (serial terminal) and DTU-Config.
* The device supports switching between SMS transparent transmission, network transparent transmission, and AT command mode.
* Entry into temporary command mode follows a defined sequence of character strings.
* A user manual document is linked in the wiki.

'''Commands and examples – verify before use:''' 
<syntaxhighlight lang="text">
+++
a
+ok
</syntaxhighlight>

== Notes and version constraints ==
* Entering temporary command mode requires precise timing: no data within 200 ms before sending "+++"; the response character 'a' must be sent within 3 seconds.
* Version-specific steps and regional network coverage are not stated in the source text – please verify before deployment.
* The specified target region (EMEA, Korea, Thailand, India, Southeast Asia) determines supported bands; local network availability must be confirmed separately.

== Source and revision record ==
* [https://www.waveshare.com/wiki/RS485_TO_LTE_CAT4_(EU) RS485 TO LTE CAT4 (EU) - Waveshare Wiki]
* Source revision: 80517
* Captured: 2026-09-03T03:27:27+00:00
* SHA-256: <code>8d8bd6a1ab6871f3e0a930cf76b501e6730d27da8e54778e6752aa4ed70183e8</code>