MM‑20MR‑6MT‑350B‑FX‑A/B 3.5″ Industrial HMI Touch Panel

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3.5″ 320×240 TFT industrial HMI panel, USB interface, IP65 front, CE‑certified – compact and durable for machine control.

Product Overview
The MM‑20MR‑6MT‑350B‑FX series offers 3.5″ TFT touch‑screen HMIs designed for industrial automation. Both variants (FX‑A and FX‑B) support 320×240 resolution, USB communication and feature a CE‑certified, IP65-rated front panel. With compact black housing, these panels connect easily to host systems via USB and withstand harsh environments thanks to sealed front and robust construction. FX‑A includes integrated PLC-type IO (12 opto inputs, 6 transistor outputs, 8 relay outputs), while FX‑B focuses on interface-only functionality.

How to Use

  1. Mount unit into panel cutout (~99 × 78 mm).
  2. Supply DC24 V power (approx. 75 W for FX‑A).
  3. Use Mini USB to program/upload interface logic or screens.
  4. Connect to host device via USB communication.
  5. Clean front panel regularly when used in dusty or wet environments.
  6. Safety: Ensure power off before wiring IO; FX‑A’s IO lines are functional automation signals.

Related Videos
No specific YouTube videos found for the MM‑20MR‑6MT‑350B series, but search “YK‑HMI 3.5 inch HMI programming” or “YKHMI FX HMI installation” on YouTube for setup and UI examples.

Frequently Asked Questions (FAQ)

  1. Which models are supported?
    • MM‑20MR‑6MT‑350B‑FX‑A and FX‑B.
  2. What is the screen size and resolution?
    • 3.5″ TFT display at 320×240 pixels.
  3. Power requirements?
    • DC 24 V, around 75 W (FX‑A includes IO).
  4. Communication interface?
    • USB—mini USB for programming; internal TTL port also supported.
  5. Is it waterproof?
    • Front panel rated IP65.
  6. What’s the difference between FX‑A and FX‑B?
    • FX‑A includes integrated IO (12 inputs, 6 transistor outputs, 8 relays); FX‑B is display/programming only.
  7. Certifications?
    • CE certified.
  8. Cutout dimensions?
    • Approx. 99 mm × 78 mm.
  9. Warranty or lead time?
    • Typically 18 months warranty; standard lead time ~7 days for small orders.
  10. Can it integrate with other PLCs?
    • Compatible with Mitsubishi FX protocols and other supported systems.

User Review Summary
Few reviews available online. On eBay, used FX‑A models listed at ~$144 USD with positive feedback on prompt delivery and accurate description. No direct pros‑cons feedback published, but packaging and seller communication praised.

Comparison with Competing Products
• Compared to larger YKHMI models (e.g. MM‑20MR‑6MT‑430A or 4.3″ versions), the 3.5″ size is more compact but offers lower resolution.
• FX‑A model includes built‑in PLC‑style IO (making it an all‑in‑one unit), unlike FX‑B and typical generic HMIs which require external controllers.

Technical Specifications
Model numbers: MM‑20MR‑6MT‑350B‑FX‑A, FX‑B
Display: 3.5‑inch TFT touch, 320×240 pixels
Power: DC 24 V, consumption approx. 75 W (FX‑A includes IO)
Communication: USB mini (programming), internal TTL port
IO (FX‑A only): 12 opto‑coupler inputs, 6 transistor outputs, 8 relay outputs
Front panel: IP65, CE certified
Cutout size: ~99 × 78 mm
Housing: Black industrial enclosure

Brand or Manufacturer Info
YKHMI (Shenzhen Zhongda Youkong / Shengda Electric) specializes in industrial integrated HMI‑PLC devices. Products like MM‑20MR series offer compact automation panels with optional built‑in IO. The brand is based in Guangdong, China, with focus on CE‑compliant cost‑effective factory automation devices.

Purchase Recommendations
YKHMI: https://www.ykhmi.store/mm-20mr-6mt-2/

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