The Advantech WOP-204K is a compact 4.3-inch WQVGA (480×272) resistive touch screen HMI operator terminal, powered by an ARM9™ 32‑bit RISC processor with 64 MB SDRAM and 128 MB NAND Flash storage. Designed for the automation market particularly packaging, label slitting, and food & beverage applications, it supports operations involving PLCs, thermal controllers, inverters and sensors. The unit bundles Advantech's HMINavi software, providing object‑oriented visualization, 500+ industrial PLC communication drivers, and MQTT cloud uplink capability—all while maintaining an IP66‑rated front panel suitable for washdown environments. Three serial ports (RS‑232, RS‑422/485, RS‑485), Ethernet, and dual USB ports allow flexible connectivity with legacy and modern automation systems without requiring additional protocol converters. The 118.5 × 92.5 mm panel cutout and slim 31.3 mm depth make the WOP-204K suitable for space‑constrained control enclosures and retrofits.

Seamless PLC Connectivity — 500+ Protocols Without Additional Hardware

• 500+ Built‑in PLC Communication Drivers: The WOP-204K can connect to over 90% of global PLC devices without external protocol gateways. Supported protocols include Modbus RTU/TCP, Siemens S7 series, Mitsubishi MELSEC, Omron, Allen-Bradley and over 500 other market brands—meaning the panel integrates directly with virtually any existing PLC installation in the field.
• Data Exchanger Function: The data exchanger function can exchange a variety of PLC data formats across different protocols simultaneously. For example, the WOP-204K can read process values from a Modbus RTU temperature controller, write setpoints to a Siemens S7 PLC, and publish both datasets to an MQTT broker—all from a single configuration and without writing any script code.
• MQTT Protocol for OT & IT Integration: The latest MQTT uplink communication protocol makes it easy to achieve OT & IT integration. Users can turn legacy machinery into intelligent machinery while having all important data and backups managed by cloud services.
• Comprehensive Communication Ports: COM1 (RS‑232), COM2 (RS‑422/485), COM3 (RS‑485)—all via 5‑pin screw terminal—plus Ethernet RJ45 10/100, USB Client, and USB Host. This covers the full spectrum from legacy serial devices to modern networked automation architectures.

Free HMINavi Designer — No License Fees, Rapid Application Porting

• Cost‑Free Development Tool: HMINavi Designer is supported free on Windows 10, and HMINavi Runtime data downloads are supported through Serial, Ethernet, and USB port without requiring additional licensing fees per deployed panel. Over 50 screen objects can be used for all types of HMI visualizations.
• Rapid Application Porting Across Display Sizes: One application can be switched to different LCD sizes in seconds—from the 4.3‑inch WOP-204K up to 15‑inch models in the WOP-200K series. This means an integrator can develop a single HMI project for a compact entry‑level machine and deploy it across the entire product line without rewriting the application for each screen size.
• Built‑in Data Logger and Recipe Handling: The controller includes a data logger with trend display (up to 16 different data sources per display), support for data collection, alarm monitoring, recipe handling, and operation logging. No limitation on the number of tags for the internal I/O points—suitable for complex machinery with hundreds of monitored parameters.
• Landscape and Portrait Mode: Supports operation in both landscape and portrait mode, enabling flexible mounting in variously oriented control panels.

Industrial-Grade Design for Harsh Environments

• IP66-Rated Front Panel: The front panel is rated IP66—dust tight and water jet resistant—making it suitable for food & beverage, packaging, and pharmaceutical washdown environments where equipment must withstand regular cleaning with low‑pressure water jets.
• Wide Operating Temperature Range: The WOP-204K operates reliably from -10 °C to 60 °C, with conformal coating motherboards that increase lifecycle by 80%. Combined with vibration protection (5~500 Hz, X,Y,Z direction, 1Grms), it is suitable for un‑air‑conditioned factory floors and vibration‑prone machinery.
• Reliable RTOS Platform: The HMI RTOS operating system provides deterministic, predictable performance compared to general‑purpose operating systems. Combined with isolation power input design and low 10 W power consumption, it reduces security issues and operates reliably on 24 V DC industrial power buses.
• Compact Form Factor: 129 × 103 × 31.3 mm, weighing only 0.23 kg. The panel cutout is 118.5 × 92.5 mm. The slim depth makes it particularly suitable for shallow control cabinets, operator consoles, and embedded machine panels where depth behind the panel is limited.
• Global Certifications: Complies with CE, FCC, UL61010, and RoHS. Backed by Advantech's 2‑year warranty.

Applications

• Packaging machinery: blister pack machines, shrink‑wrap tunnels, cartoning and case‑packing lines
• Label slitting and converting equipment: operator interface for setup, speed control, and batch monitoring
• Food & beverage processing: IP66 washdown‑rated panels for ovens, fryers, pasteurizers, and clean‑in‑place systems
• Compact control panels: space‑saving HMI for conveyors, small presses, injection molding auxiliary equipment, and motor control centers
• Retrofit and modernization: replacement of obsolete text‑only operator panels with a full‑color touchscreen interface without changing the existing PLC infrastructure
• Any industrial automation application requiring a compact, low‑cost resistive touch HMI with wide PLC compatibility