Pro-face PFXLM4B01DAC

The Pro-face PFXLM4B01DAC is a high-performance 3.5-inch HMI + Control unit from the LT4000M Modular Series.

The “LT” designation indicates that this is a “Logic Terminal,” meaning it is a hybrid device that combines a Touch Screen HMI with a Built-in PLC (Programmable Logic Controller). Like the GP-4301TM, it uses a modular 22 mm circular mounting system.

1. Display and Visuals

• Screen Size: 3.5-inch.

• Display Type: TFT Color LCD.

• Resolution: $320 \times 240$ pixels (QVGA).

• Colors: 65,536 colors.

• Backlight: White LED with 16 levels of brightness control.

2. Built-in I/O (The “Control” Side)

The PFXLM4B01DAC is a “Digital + Analog” variant, making it capable of controlling hardware directly without an external PLC.

• Digital Inputs: 12 points (24V DC).

• Digital Outputs: 6 points (Transistor, Source type).

• Analog Inputs: 2 points. These are multi-functional and can be configured for:

  • Voltage ($0–10V, -10–10V$).

  • Current ($4–20mA, 0–20mA$).

  • Temperature sensors (Thermocouple or Pt100).

• High-Speed Counters: Supports up to 2 channels (50 kHz) for encoder feedback or high-speed pulses.

3. Modular 22 mm Design

The unit is split into two parts: the Display Module and the Rear Logic Module.

• Easy Installation: Mounts through a standard 22 mm circular hole. You do not need to cut a large rectangular hole in the control panel.

• Separation: The HMI screen is on the front, while all the wiring (Power, I/O, Communication) is handled by the module snapped onto the back.

4. Technical Specifications

5. Key Features

• All-in-One Solution: Reduces panel space and wiring costs by eliminating the need for a separate PLC and communication cable.

• PID Control: Built-in PID instructions allow it to handle temperature or pressure control loops using the integrated analog I/O.

• Remote Monitoring: Supports the Pro-face Remote HMI app, allowing you to view and control the machine logic from a smartphone or tablet.

• Data Logging: Can log process data or alarms directly to a USB flash drive connected to the USB Host port.

Comparison Note:

The PFXLM4B01DAC is the Analog version. If you see a model ending in DDC, that version only has Digital I/O (20 inputs / 10 outputs) and lacks the analog input channels for temperature or voltage.