---
title: "How Does GPO Display Add Ethernet Control to 24/7 Video Walls with WIZ750SR?"
url: "https://maker.wiznet.io/Alan/resellers/how-does-gpo-display-add-ethernet-control-to-24-7-video-walls-with-wiz750sr/"
markdown_url: "https://maker.wiznet.io/Alan/resellers/how-does-gpo-display-add-ethernet-control-to-24-7-video-walls-with-wiz750sr/md"
type: "VAR: Value-Added Reseller Products"
author: "GPO Display"
author_url: "https://gpodisplay.com/products/lcd-video-walls/next-gen-nex-series/?utm_source=chatgpt.com"
editor: "WIZnet"
editor_url: "https://maker.wiznet.io/"
original_author: "GPO Display"
original_url: "https://gpodisplay.com/products/lcd-video-walls/next-gen-nex-series/?utm_source=chatgpt.com"
published: "2026-11-09"
language: "en"
likes: 0
views: 5
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---
# How Does GPO Display Add Ethernet Control to 24/7 Video Walls with WIZ750SR?
> GPO Display is a US-based manufacturer of commercial display solutions, including LCD video walls, professional monitors, and digital signage systems.
Original author: GPO Display (source: https://gpodisplay.com/products/lcd-video-walls/next-gen-nex-series/?utm_source=chatgpt.com)
## Article
## How Does GPO Display Add Ethernet Control to 24/7 Video Walls with WIZ750SR?
### Overview
**GPO Display** is a US-based manufacturer of commercial display solutions, including LCD video walls, professional monitors, and digital signage systems.
Its **NEX-Series Video Walls** are designed for continuous 24/7 operation in corporate environments, control rooms, public spaces, and professional AV installations.
The NEX family includes 49-inch, 55-inch, and 75-inch commercial LCD displays, with HDMI, DisplayPort, Ethernet, and RS-232 interfaces.
An interesting technical detail appears in the official **NEX-Series Video Wall User Manual**.
On page 44, the Network Configuration Tool identifies the Ethernet control device as **WIZ750SR**, a Serial-to-Ethernet module developed by WIZnet.
Even more interestingly, the configuration screen displays two manufacturer-specific values:
- Device Name: WIZ750SR
- Customer Code: gpo
- Model Name: gpo
These details provide direct documentary evidence that a WIZ750SR-based network control interface was configured for GPO Display's NEX-Series products.
The example illustrates how an existing serial control system can be extended to Ethernet without redesigning the entire display control architecture.
---
### What Problem Does Ethernet Control Solve in Video Walls?
A professional video wall often consists of multiple displays operating together as a single visual system.
Unlike a standalone monitor, a video wall requires coordinated control of several independent displays.
Typical control functions include:
- Power ON/OFF
- Input source selection
- Display identification
- Video wall layout configuration
- Brightness and image settings
- Remote status monitoring
- Centralized display management
Traditional professional displays commonly use RS-232 for these functions.
RS-232 remains useful because it provides a simple and predictable command interface.
However, connecting a control computer directly to a large display installation through serial cables can complicate integration with network-based AV control systems.
Ethernet control offers another approach.
Instead of requiring a dedicated serial connection between the control system and the display installation, commands can be transported over an IP network.
This is where a Serial-to-Ethernet module such as WIZ750SR becomes valuable.
---
### What Does the NEX-Series Hardware Provide?
GPO Display's NEX-Series is designed for demanding commercial applications.
According to the manufacturer's published specifications, the product family offers:
| Feature | Specification |
| --- | --- |
| Display sizes | 49, 55, and 75 inches |
| Display technology | Commercial direct-lit IPS LCD |
| Resolution | 1920 × 1080 for 49/55-inch models; 3840 × 2160 for 75-inch models |
| Brightness | 500–700 nits, depending on model |
| Operation | 24/7 rated |
| Industrial reliability specification | 50,000 / 60,000+ hours |
| Video inputs | 3 HDMI, 2 DisplayPort |
| Network interface | 1 Ethernet |
| Serial control | RS-232 input and output |
| Video output | DisplayPort |
The 49-inch and 55-inch NEX displays are also listed as **Extron Quantum Ultra Certified**.
The displays support video wall functions such as image rotation, color calibration, narrow-bezel arrangements, and signal daisy-chaining.
An important distinction is that HDMI and DisplayPort carry video content, while Ethernet and RS-232 provide control interfaces.
The WIZ750SR-related implementation concerns the control network, not video transport.
---
### Where Is WIZ750SR Identified?
The strongest technical evidence appears in the official GPO Display document:
**NEX-Series Video Wall User Manual, Version 1.0**
Section 13: Network TCP/IP Control Setup
Page 44: Network Config Tool
The configuration software screenshot includes the following information:
| Parameter | Value shown |
| --- | --- |
| Device Name | WIZ750SR |
| Customer Code | gpo |
| Model Name | gpo |
| Serial Interface | RS-232/TTL |
| Firmware Version | 1.2.4 |
| Operation Status | OPEN |
| Example IP Address | 192.168.0.103 |
| Example Server Port | 5000 |
| IP Address Mode | Static IP / DHCP |
This is significant because the manufacturer did not merely mention generic Ethernet connectivity.
The official product manual actually shows the WIZ750SR product name inside the network configuration interface.
The `gpo` customer and model identifiers also indicate a vendor-specific configuration associated with GPO Display.
While the screenshot does not disclose the underlying firmware source code, it is clear evidence of manufacturer-specific device identification within the WIZ750SR configuration environment.
---
### What Is WIZ750SR?
**WIZ750SR** is a compact Serial-to-Ethernet module developed by WIZnet.
It uses the **W7500P Ethernet MCU**, which integrates an ARM Cortex-M0 processor and a hardwired TCP/IP engine.
WIZ750SR is designed to exchange data between serial interfaces and Ethernet networks.
Its main capabilities include:
- Serial-to-Ethernet and Ethernet-to-Serial conversion
- 10/100 Mbps Ethernet
- TTL, RS-232, and RS-422/485 interface variants
- TCP Server mode
- TCP Client mode
- TCP Server/Client Mixed mode
- UDP mode
- Static IP and DHCP configuration
- Network-based configuration tools
- Serial command configuration
- Firmware update capability
The module allows equipment originally designed around serial communication to become accessible over Ethernet.
For equipment manufacturers, this can provide a practical way to add IP connectivity while preserving existing serial command protocols.
---
### How Does WIZ750SR Fit into the Video Wall Control Architecture?
The NEX-Series User Manual describes both RS-232 serial control and TCP/IP network control.
It also states that the serial command list continues to apply when controlling the displays over IP.
This is particularly important.
It means that the network interface can preserve the existing display command structure instead of requiring users to learn a completely different command set.
A simplified architecture can be represented as follows:
```plaintext
AV Control Computer
or Building Control System
|
| TCP/IP over Ethernet
|
WIZ750SR
Serial-to-Ethernet
|
| Serial Control Interface
|
NEX Video Wall Controller
|
| Display Control Commands
|
NEX Display Array
|
RS-232 Daisy Chain
|
Individual Displays
```
This is a functional representation based on the documented IP and serial control interfaces. The manufacturer does not publish the internal schematic showing the exact physical connection between WIZ750SR and the display controller.
The documented result is straightforward: NEX-Series displays can be controlled through an IP connection using the existing serial command structure.
---
### Why Is Serial-to-Ethernet Conversion Useful Here?
Professional AV equipment often has a long product lifecycle.
Manufacturers may already have established command protocols, control boards, diagnostic tools, and software built around serial communication.
Replacing the entire control system simply to add Ethernet can require substantial engineering effort.
A Serial-to-Ethernet module provides a different approach.
#### Reuse Existing Control Commands
The GPO Display manual explicitly states that the serial commands remain applicable when controlling the NEX-Series through IP.
This allows existing command-based control functions to be used through an Ethernet connection.
#### Simplify Integration with AV Networks
Professional AV installations commonly use Ethernet switches and centralized management systems.
An Ethernet control interface allows displays to be accessed through the existing network infrastructure.
#### Support Static IP and DHCP
The Network Configuration Tool allows installers to select either Static IP or DHCP.
Static addresses are useful when displays must be assigned predictable network locations.
DHCP can simplify initial network deployment.
#### Provide Network-Based Configuration
The tool supports searching for network devices, applying settings, restarting devices, and restoring factory settings.
This provides a practical commissioning interface for installers.
#### Reduce Serial Interface Redesign
WIZ750SR is designed to convert data between serial and Ethernet interfaces.
Its use allows manufacturers to retain a serial-oriented control architecture while adding TCP/IP connectivity.
---
### How Are Multiple Displays Controlled?
The NEX-Series supports RS-232 daisy-chain control.
The official manual describes connecting displays sequentially through their RS-232 input and output interfaces.
Each display is assigned a Set ID.
The controller can then address individual displays within the video wall.
The manufacturer documents an RS-232 daisy-chain limitation of **30 displays**.
In addition, the display configuration software supports video wall layout management, status information, and remote control operations.
When Ethernet control is enabled, the manufacturer instructs installers to configure the network interface and test TCP/IP control using the SICP software.
This means an IP connection can serve as the entry point to the video wall control system, while the display-side control architecture continues to use the established serial command structure.
---
### What Is SICP?
GPO Display provides **SICP**, a software tool for controlling and configuring its video wall displays.
The NEX-Series manual references SICP Version 5.20.
SICP provides functions for:
- Display identification
- Status monitoring
- Input selection
- Video wall configuration
- Display control
- Image adjustment
- Set ID management
The network setup instructions specifically recommend testing TCP/IP control through SICP before switching to a third-party control system.
This is important because it provides a defined verification process for network control.
The workflow can be summarized as:
1. Connect the NEX display to the Ethernet network.
2. Run the Network Configuration Tool.
3. Discover the WIZ750SR-based network interface.
4. Configure the IP address and other settings.
5. Open SICP and select TCP/IP control.
6. Verify display control operation.
7. Integrate the display with the intended third-party AV control system.
This is a practical commissioning sequence documented by the manufacturer.
---
### What Does the GPO-Specific Configuration Suggest?
The Network Configuration Tool shows two noteworthy identification fields:
- Customer Code: gpo
- Model Name: gpo
These values are not generic labels describing an Ethernet interface.
They specifically reference GPO Display.
This suggests that the network control device was configured for the manufacturer's product environment.
The screenshot also identifies the underlying device as WIZ750SR.
From an embedded hardware perspective, this is an interesting example of how a standard Serial-to-Ethernet module can become part of a manufacturer's product-specific control interface.
However, the documentation does not establish whether GPO Display uses custom firmware, a modified hardware module, or only manufacturer-specific configuration values.
What is directly demonstrated is a WIZ750SR-identified network interface with GPO-specific device information.
---
### Where Is the NEX-Series Used?
GPO Display publishes commercial installation examples for its video wall products.
A recent example involves **Rodan + Fields**, a skincare company with an office in California.
The company had operated an earlier GPO Display video wall for nearly nine years.
When the previous installation reached end-of-life status, Rodan + Fields selected a new **NEX55MLR 3×3 video wall**.
The replacement system uses nine 55-inch NEX55MLR panels.
According to GPO Display, the panels provide:
- 55-inch commercial IPS LCD displays
- 500-nit brightness
- 1,400:1 contrast ratio
- 0.88 mm combined bezel gap
- 24/7 operational rating
- 60,000-hour industrial reliability specification
The new video wall was installed using the existing mounting infrastructure.
GPO Display reports that the facilities team completed the installation in one day.
This case demonstrates that the NEX-Series is used in actual commercial installations rather than existing only as a product concept.
The installation report does not independently identify the Ethernet control module fitted to those particular panels. The WIZ750SR reference comes from the separate NEX-Series product manual.
---
### Why Is This a Valuable WIZ750SR Application?
Many Serial-to-Ethernet examples focus on industrial sensors, serial terminals, remote monitoring devices, or development boards.
GPO Display presents a different application category.
The NEX-Series is a commercial video wall product designed for professional AV installations.
Its network control system must integrate with display configuration tools, existing serial commands, and third-party AV control software.
WIZ750SR is particularly relevant because it provides a way to connect existing serial control functions to an IP network.
Several details make this case valuable:
- WIZ750SR is explicitly named in the official manufacturer manual.
- The Network Configuration Tool displays GPO-specific customer and model identifiers.
- The manual documents TCP/IP control using existing serial commands.
- Both Static IP and DHCP configuration are supported.
- Network commissioning is performed through manufacturer-provided configuration software.
- The NEX-Series is a commercial product family with published installation references.
These facts establish a credible example of Serial-to-Ethernet technology being integrated into professional display control equipment.
---
### Conclusion
GPO Display's NEX-Series demonstrates how Ethernet connectivity can be added to professional video wall control systems while retaining established serial command interfaces.
The product family supports 24/7 operation, multiple video inputs, RS-232 control, Ethernet connectivity, and centralized display configuration.
Most importantly, the official NEX-Series User Manual identifies **WIZnet WIZ750SR** in its Network Configuration Tool.
The presence of `Customer Code: gpo` and `Model Name: gpo` provides additional evidence of manufacturer-specific integration.
The manual also confirms that the existing serial command structure can be used for TCP/IP control.
Together, these details show how WIZ750SR can support a commercial display manufacturer's transition from serial-only control toward Ethernet-enabled AV systems.
The NEX-Series' documented commercial deployment further demonstrates the relevance of this type of networked control architecture in professional installations.
---
### References
**GPO Display — NEX-Series Video Walls**
**GPO Display — NEX-Series Video Wall User Manual**
Version 1.0, Section 13, Pages 43–44
**GPO Display — Rodan + Fields Lobby Video Wall Refresh**
**WIZnet — WIZ750SR Official Documentation**
---
Source: https://maker.wiznet.io/Alan/resellers/how-does-gpo-display-add-ethernet-control-to-24-7-video-walls-with-wiz750sr/