> For the complete documentation index, see [llms.txt](https://support.powerio.com/hub/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.powerio.com/hub/powerio-r-system/en/h1.m300/feldbus-protokolle/transparent.md).

# Transparent

The Transparent Mode enables direct transmission of serial data over TCP/IP networks.

**Configuration:**

* Each serial port is assigned a unique TCP port
* Example: Serial Port 1 → TCP 7001, Serial Port 4 → TCP 7004

**Advantages:**

* No special protocol conversion required
* Direct integration into existing systems
* Suitable for legacy devices with a serial interface
* Enables remote access over the network

## Selection for Serial Transparent Mode

* The mode can be selected for each individual Serial Port. The selection is made under "Serial Settings" via the "Fieldbus" drop-down menu.

<figure><img src="/files/04236c2753b25c2e342bc2045d3520f1e73e5add" alt=""><figcaption><p>Serial Settings overview - selection via drop-down menu "Fieldbus"</p></figcaption></figure>

{% hint style="info" %}
The H1.M300 has no expansion slot. The four onboard ports (Serial Port 1 to 4, TCP 7001 to 7004) are available.
{% endhint %}


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