Pro-face GP4105W1D is a compact RS-232C touch screen HMI designed for space-constrained industrial applications. Featuring a 3.4-inch STN monochrome LCD with a resolution of 200 × 80 pixels, it provides clear visual feedback supported by a red tricolor LED backlight. The analog resistive touch panel ensures reliable operation even in harsh environments, allowing accurate input with gloved hands or under challenging conditions.

The device operates on a DC24V power supply and is equipped with 2.2MB of internal memory, sufficient for small to medium-scale control tasks. While it lacks an Ethernet interface and SD card slot, it offers versatile connectivity through a single RS-232C serial port, along with USB Type-A (2.0) and USB Mini-B (2.0) ports for data transfer, programming, and peripheral connection.

The GP4105W1D supports intuitive drag-and-drop programming, enabling seamless linking of register data between HMI screens and control programs. This direct association streamlines the entire programming workflow, making it highly visual and efficient. Commonly used and specialized control functions can be encapsulated as function blocks, simplifying the design of control systems.

One of the key advantages of this model is its modular architecture. The system includes six display modules and two host modules, allowing for 12 different "Smart Platform" combinations. The display module and host module can be separated and replaced independently, providing flexibility in both function and physical dimensions. This design enables users to tailor the HMI to specific application requirements while simplifying maintenance and upgrades over time.