HOTHMI 2 inch HMI LCD Display 240×320 with UART IPS

Product Description

LCM-EU020T61NL is a 2.0 Inch HMI LCD module designed for embedded human-machine interfaces, compact industrial control terminals, and smart electronic devices. It uses TFT LCD technology with a display area of approximately 40.80 × 30.60 mm and a resolution of 240 × 320 RGB. The module supports 262K colors and features a Normally Black display mode. Its Full View structure provides an 80° viewing angle in the up, down, left, and right directions, making it suitable for compact HMI terminals that require a relatively wide viewing range.

Unlike a conventional bare TFT LCD panel, this HMI LCD integrates a UART (TTL) serial communication interface. The 5-pin connector provides +5V, RXD, GND, TXD, and Test connections. For compact equipment using an MCU as the main controller, display communication can be handled through UART, reducing the number of display-related I/O resources required from the MCU. This makes the module easier to integrate into embedded systems where board space and available I/O resources are limited.

The TFT operating temperature range of this HMI LCD is -10°C to +60°C, while the storage temperature range is -20°C to +70°C. It is therefore more suitable for industrial equipment, instrumentation, and embedded control devices operating in normal-temperature or controlled environments.

Product Specifications

HMI LCD Product Highlights

UART (TTL) Interface Reduces MCU I/O Requirements

The module uses a UART (TTL) interface and communicates with the MCU through TXD and RXD. Compared with display interfaces that require multiple parallel data lines, UART communication uses fewer signal lines between the controller and display module. This can simplify hardware connections for MCU platforms with limited GPIO or without a dedicated parallel display interface.

Full View Structure for Multi-Direction Viewing

The HMI LCD features a Full View structure with U80/D80/R80/L80 viewing angles. The 80° viewing angle in four directions allows the display content to remain readable when the user is not directly facing the screen. This configuration is suitable for control panels, instruments, and embedded equipment where the viewing direction may vary during operation.

Compact PCB Dimensions for Space-Constrained Equipment

The PCB measures approximately 52.00 × 41.60 mm, while the TFT outline is approximately 47.83 × 34.60 mm. The maximum component height is approximately 7.50 mm. These dimensions provide useful mechanical references when designing the PCB mounting area, enclosure, and internal component layout of compact control equipment.

HMI LCD Pin Description

Typical Product Applications

Compact Industrial Controllers and Parameter Display Terminals

The HMI LCD can be used in compact PLC control boxes, equipment controllers, and data acquisition terminals. Through UART communication with the main MCU, it can display equipment operating status, set values, alarm codes, counters, and operating modes. Its 2.0-inch size is suitable for control panels and equipment with limited installation space.

Portable Testing and Measurement Instruments

For handheld testers, electronic measurement equipment, and portable inspection terminals, the module can display real-time measurement values, units, upper and lower limits, test results, and system status. The 240 × 320 resolution provides enough space for numerical data and basic menu interfaces, while the UART interface simplifies communication with the instrument’s MCU.

Embedded HMI Equipment

This HMI LCD is also suitable for compact embedded devices that require a small display with serial communication, such as parameter setting units, environmental monitoring terminals, and small automation controllers. The main MCU can communicate with the display through UART for parameter configuration, status monitoring, and alarm indication without using a large number of parallel display I/O lines.

Engineering and Technical Q&A

Q1: Is the UART (TTL) interface of LCM-EU020T61NL compatible with other MCU UART interfaces?

A：LCM-EU020T61NL uses a UART (TTL) interface and communicates through TXD and RXD. When integrating the module with an MCU, the controller should first be checked for an available UART/USART interface. The logic level, communication parameters, and protocol definition also need to be verified on both sides. The current product information only identifies the interface as UART (TTL) and does not provide the complete electrical-level and communication-protocol specifications. Therefore, these details should be confirmed with the supplier before replacing an existing HMI LCD or integrating the module into a new MCU platform.

Q2: What should be considered when designing the power supply and backlight for this HMI LCD?

A：The module uses a +5V power supply, with the specification listed as +5V/1A. The backlight consists of white LEDs configured as 1 series and 4 parallel branches. The specified LED forward voltage is 3.0–3.4V and the LED current is 80mA. During system design, engineers should consider the maximum current consumption, available power-supply margin, and the backlight driving method. A suitable constant-current design should be used to maintain stable LED current and avoid display issues caused by power-supply voltage drops or backlight current fluctuations.

From minor concept tweaks to full custom redesign & development, our engineering team offers end-to-end technical support. Feel free to contact us for custom display demands or technical issues during product selection.