Overview
What are Touch Screen HMIs?
Touch Screen HMIs (Human-Machine Interfaces) are industrial control devices that allow operators to interact with automated machinery through a graphical user interface. Unlike traditional push-button panels, these units integrate high-resolution displays with touch-sensitive overlays, enabling complex data visualization, alarm management, and real-time parameter adjustments. In modern industrial ecosystems, the HMI serves as the primary gateway for IIoT data collection, often bridging the gap between the PLC (Programmable Logic Controller) and higher-level SCADA or ERP systems.
Main Manufacturers
Palm Parts Solution stocks high-performance touch screen HMIs from the industry’s most reliable manufacturers, ensuring compatibility with virtually any PLC environment:
- Allen-Bradley: Featuring the PanelView Plus and PanelView 800 series.
- Siemens: Including the SIMATIC Comfort, Basic, and Mobile Panels.
- Mitsubishi Electric: Leaders in the GOT2000 and GOT1000 series.
- Schneider Electric: Specializing in the Magelis (now Harmony) STO, STU, and GTO ranges.
- Pro-face: The pioneers of the industrial HMI, including the GP4000 and SP5000 series.
- Weintek: Cost-effective, high-feature units like the cMT and MT8000 series.
- Delta Electronics: Reliable DOP-100 and DOP-W series.
- Additional Stock: Omron (NB/NA series), B&R Industrial Automation (Power Panel), Lenze (v800), and SEW-Eurodrive.
Typical Applications
Touch screen HMIs are utilized across every vertical in industrial automation. Common applications include:
- Automotive Manufacturing: Monitoring robotic cell status and cycle times using high-speed Ethernet communications.
- Food & Beverage: Using IP69K-rated stainless steel HMIs for washdown zones and recipe management.
- Packaging: Interfacing with motion controllers (e.g., Kinetix or SINAMICS) to adjust servo parameters on the fly.
- Water/Wastewater: Remote monitoring and data logging via VPN-enabled screens like the Weintek cMT series.
Selection Guide
When selecting a touch screen HMI, prioritize the following technical specifications:
- Display Size and Resolution: Match the screen size (typically 4.3" to 21") to the complexity of the graphics and the viewing distance of the operator.
- Communication Protocols: Ensure the hardware supports the required physical layers (RJ45, DB9, Terminal Block) and protocols (EtherNet/IP, PROFINET, Modbus TCP/RTU, EtherCAT).
- Environment: Choose resistive touch for glove-heavy environments or capacitive touch for high-clarity, multi-touch requirements. Verify NEMA/IP ratings.
- Processing Power: Higher-end series like the SIMATIC S7-1500 compatible Comfort Panels offer faster screen refresh rates and better handling of historical trending data.
375 products
Frequently asked questions
What is the standard voltage rating for industrial touch screen HMIs?
Standard industrial touch screen HMIs typically operate on 24V DC, which is the industry standard for control panels. However, some larger format panels or older modular units may require 100-240V AC. Always verify the power terminal specifications in the hardware manual to prevent board failure.
What is the difference between Resistive and Capacitive HMI screens?
The primary difference is the interaction method: Resistive screens use pressure and are ideal for operators wearing thick gloves or in environments with moisture/contaminants. Capacitive screens (like smartphones) support multi-touch gestures and offer better clarity but may not respond to standard work gloves unless specifically designed for industrial use.
Can I use a different brand of HMI with my existing PLC?
Yes, most modern HMIs from brands like Weintek or Pro-face feature extensive driver libraries. For example, a Weintek MT8000 series can communicate simultaneously with an Allen-Bradley ControlLogix via EtherNet/IP and a Siemens S7-1200 via PROFINET, acting as a protocol bridge between different manufacturers.
What should I consider when replacing an obsolete HMI panel?
When replacing an obsolete HMI, you must match the physical cutout dimensions, communication ports (RS-232/485 vs. Ethernet), and software compatibility. Many manufacturers, such as Pro-face and Mitsubishi, offer adapter plates to fit newer, smaller screens into older, larger panel cutouts to avoid metalwork.
Are touch screen HMIs waterproof?
Industrial HMIs typically carry an IP65 or IP66 rating on the front face, meaning they are dust-tight and protected against water jets. This allows them to be used in washdown environments provided they are properly gasketed and mounted in an appropriate enclosure.