---
title: TQ EM420
slug: help-center/0f7X-tq-em420
docTags: 
createdAt: 2024-12-06T17:51:05.893Z
---

## TQ EM420 Network setting for Modbus TCP 

- **Connect the device to your LAN via Ethernet Cable**
- **Determine the IP address of the device:**
  - By default, if **DHCP** is enabled on the EM420 device, it will automatically receive an IP address from your network router. To find this IP address:
    - Check your router's DHCP client list for the EM420 device (using its MAC address, often printed on a label).
    - Alternatively, if **UPnP** is enabled, the device should automatically appear in the network environment on Windows PCs, allowing you to find its IP address.
  - If you have previously set a **static IP address**, you will need to use that IP to access the web interface.
- **Access the Web Interface:**
  - Open a web browser (Chrome, Firefox, Safari, Edge). **Microsoft Internet Explorer does not work**. 
  - In the address bar, type the device's IP address (e.g., http\://192.168.x.x).
- **Login Credentials: **
  - You will be prompted for a password. **The default password is printed on a sticker on the device**.
  - If the default credentials were changed and you don't remember them, you can reset the device's web interface password:
    - Press the **reset button** and hold it **for 3-5 seconds **(a long press) and then a **short press **(about half a second).
    - The device will shortly blink orange twice to confirm the password has been reset to the factory default.
    - You can now use the credentials on the type label to log in again.

![](https://api.archbee.com/api/optimize/3Xh9z-k7HF8ThwnEZ6HI0-qSyDiyvkP2uHv3UZuS_zf-20241219-071929.jpg)

- **Dashboard:**
  - Once you log in you will see the device's dashboard, where you can perform all the settings:

![](https://api.archbee.com/api/optimize/3Xh9z-k7HF8ThwnEZ6HI0-s-RgwVwtLyWiNpODmHbJ9-20241219-072608.jpg)

- **Network Settings:**
  - Click on "**Device settings**"->"**Network settings**". Here, you can set a static IP address and its mask or enable DHCP so that the device gets assigned an IP address from the DHCP server.

![](https://api.archbee.com/api/optimize/3Xh9z-k7HF8ThwnEZ6HI0-c8adDrjVlJpdbyAtOHyi5-20241219-072740.jpg)

![](https://api.archbee.com/api/optimize/3Xh9z-k7HF8ThwnEZ6HI0-SNJWNBHREBjOWtGO57xRG-20241219-072821.jpg)