Pro-face PFXLM4301TADDC LT-4301M HMI Controller

The Pro-face PFXLM4301TADDC is an integrated HMI (Human-Machine Interface) and PLC controller from the LT-4301M series, combining operator interface functionality with onboard control in a single compact device. This 5.7-inch TFT color display unit provides both visualization and logic control, making it a suitable solution for small to medium-scale machine applications where panel space is limited. The unit features a resistive touchscreen, digital I/O and high-speed inputs and outputs, Ethernet communication, and IP65/NEMA 4X front panel protection, all in a slim 22‑mm depth housing.

Technical Specifications

Key Features and Benefits

• Integrated HMI and Control: The PFXLM4301TADDC combines operator interface and PLC logic in one device, eliminating the need for separate HMI and controller hardware. The onboard DIO includes 20 inputs (two high-speed) and 10 outputs (two high-speed), providing sufficient I/O for standalone machine control while reducing component count, wiring, and panel space.

• 5.7-Inch TFT Color Display: The 65,536-color TFT LCD delivers clear visualization of machine status, operator prompts, and process data. The 320×240 QVGA resolution provides adequate detail for displaying gauges, trend graphs, and alarm lists. White LED backlighting with 16-step brightness adjustment ensures visibility in various lighting conditions. Resistive touch technology enables operation with gloved hands.

• High-Speed I/O Capability: Two dedicated high-speed inputs can capture pulse signals up to specified frequencies for encoder feedback or high-speed event counting. Two high-speed outputs support pulse train generation for stepper motor control or PWM outputs, enabling motion control applications without external controllers.

• IP65/NEMA 4X Front Protection: The front panel enclosure meets IP65F standards, providing protection against dust ingress and low-pressure water jets, making the unit suitable for washdown environments found in food processing, beverage, and pharmaceutical applications.

Functional Overview

The PFXLM4301TADDC operates as both an operator interface and a logic controller. The HMI displays screens developed using GP-Pro EX software, while the control logic is embedded within the same project. The I/O is connected directly to field devices such as sensors and actuators, eliminating communication delays between separate HMI and PLC units. The unit can also communicate with external PLCs, motion controllers, and robots via the RS-232C, RS-485, or Ethernet ports.

Compatibility and Integration

The PFXLM4301TADDC supports connection to a wide range of industrial controllers from multiple manufacturers through built-in drivers in GP-Pro EX. The USB ports support connection to scanners, printers, and storage devices. The RS-485 interface supports 2-wire or 4-wire connections. The unit is certified for CE, UL Listed, RoHS, GOST, DNV-GL, ATEX, and IECEx, ensuring suitability for deployment in various industrial environments worldwide.

Installation and Configuration

The PFXLM4301TADDC is designed for panel mounting with a 22 mm slim depth, allowing installation in shallow enclosures. Cut the panel opening according to specifications, insert the unit, and secure with the provided mounting clamps. Connect DC power (24 VDC) to the power terminals, and wire I/O devices to the removable 3.5 mm pitch terminal blocks. Application development is performed using GP-Pro EX software, which supports screen creation, logic programming, device communication configuration, and project download over USB or Ethernet. The software includes simulation capabilities for offline testing.

Maintenance and Reliability

Routine maintenance is limited to cleaning the touch screen surface with a soft, lint-free cloth. The white LED backlight has a rated lifetime that typically exceeds the operational life of the equipment under normal usage. The unit has no internal battery for application storage, so no battery replacement is required. Power consumption is 10W or less, minimizing heat generation.

Conclusion

The Pro-face PFXLM4301TADDC provides a space-efficient solution combining HMI and PLC capabilities in a single unit. With 5.7-inch TFT color display, 20 inputs and 10 outputs, high-speed I/O channels, and robust environmental protection, the LT-4301M series addresses the requirements of small to medium machine applications where panel space, component count, and installation simplicity are design priorities.