Product Overview

The Siemens 6AV6644-0AC01-2AX1​ is a SIMATIC MP 377 19″ Touch Multi Panel—a high-performance human-machine interface (HMI) that has served as the visual and interactive cornerstone of countless industrial automation systems worldwide. As a member of Siemens’ renowned MP 377 family, the Siemens 6AV6644-0AC01-2AX1​ combines a brilliant 19-inch color TFT display with a responsive analog resistive touchscreen, delivering operators an intuitive, high-resolution window into their process control environment. Running on the Windows CE 5.0 operating system and configurable from WinCC Flexible 2007 (or higher), the Siemens 6AV6644-0AC01-2AX1​ provides a powerful, flexible platform for visualizing process values, acknowledging alarms, managing recipes, and executing complex operator interactions.At the heart of the Siemens 6AV6644-0AC01-2AX1​ lies a stunning 19-inch TFT display rendering 65,536 colors at a crisp 1280×1024 pixel resolution, with a background LED lighting system boasting an MTBF of 50,000 hours at 25 °C. The 12 MB of flash/RAM user memory (12,288 KB) provides ample space for project configuration, screen objects, and process data buffering. With a typical power consumption of just 60 W at 24 V DC (2.5 A rated current), the Siemens 6AV6644-0AC01-2AX1​ delivers exceptional performance per watt, minimizing heat generation and maximizing reliability in continuous-duty applications.Connectivity is where the Siemens 6AV6644-0AC01-2AX1​ truly shines. The panel integrates 1× RS422, 1× RS485, and 2× Industrial Ethernet (RJ45) interfaces, enabling seamless communication with SIMATIC S7-300/400, S7-200, S5, TI 505, SINUMERIK, SIMOTION, and a broad spectrum of third-party controllers including Allen Bradley, Mitsubishi, OMRON, Modicon, and GE-Fanuc. Native protocol support encompasses PROFINET IO, PROFIBUS, MPI, TCP/IP, EtherNet/IP, MODBUS, and Siemens’ Sm@rtService for remote maintenance. Two USB ports, a CF card slot, and a multimedia card slot (up to 128 MB) round out the expansion capabilities of the Siemens 6AV6644-0AC01-2AX1, allowing printer connections, barcode readers, mouse/keyboard input, and mass storage for data archiving.Housed in a robust enclosure measuring 483 mm (W) × 400 mm (H) × 75 mm (D) and weighing 7.7 kg, the Siemens 6AV6644-0AC01-2AX1​ features an IP65-rated front panel (NEMA 4/12 when installed) that withstands harsh industrial environments, while the rear maintains IP20 protection. Certified to CE, cULus, FM Class I Div. 2, and ATEX Zone 22 standards, the Siemens 6AV6644-0AC01-2AX1​ operates reliably across 0 °C to +50 °C ambient temperature with up to 90% relative humidity. Although Siemens has announced P.M490 lifecycle status for the Siemens 6AV6644-0AC01-2AX1​ effective October 1, 2026, the module remains fully supported through Siemens’ Spare Parts Supply service—ensuring that the thousands of MP 377 panels deployed globally continue to receive original manufacturer spare parts for up to ten years after discontinuation, protecting the substantial installed base of this exceptional HMI platform.

Technical Specifications

Main Features and Advantages

Brilliant 19″ High-Resolution TFT DisplayThe Siemens 6AV6644-0AC01-2AX1​ features a premium 19-inch color TFT display rendering 65,536 colors at 1280×1024 pixel resolution—providing operators with an expansive, crystal-clear visualization canvas. The analog resistive touchscreen delivers precise, responsive input even when operated with gloves or stylus, making the Siemens 6AV6644-0AC01-2AX1​ ideal for industrial environments where hygiene or safety considerations preclude bare-finger operation. The LED backlight system achieves an MTBF of 50,000 hours at 25 °C, ensuring years of maintenance-free visual performance.Comprehensive Communication CapabilityWith 1× RS422, 1× RS485, and 2× Industrial Ethernet RJ45 interfaces, the Siemens 6AV6644-0AC01-2AX1​ offers unparalleled connectivity flexibility. Native support for PROFINET IO, PROFIBUS, MPI, TCP/IP, EtherNet/IP, and MODBUS protocols enables seamless integration with virtually any industrial controller—from Siemens SIMATIC S7, S5, and SINUMERIK to third-party PLCs including Allen Bradley, Mitsubishi, OMRON, and Modicon. The dual Ethernet ports allow daisy-chain network topologies without external switches, while Sm@rtService compatibility enables secure remote maintenance and diagnostics.Generous Memory and Storage ExpansionThe Siemens 6AV6644-0AC01-2AX1​ provides 12 MB of flash/RAM user memory (12,288 KB) for project configuration, screen objects, recipes, and process data. For applications requiring additional storage, the panel includes a CF card slot and a multimedia card slot (up to 128 MB), enabling data archiving, project backup, and recipe management on removable media. Two USB host ports further extend storage and peripheral connectivity, allowing operators to connect printers, barcode readers, keyboards, mice, and USB flash drives directly to the Siemens 6AV6644-0AC01-2AX1.Powerful WinCC Flexible Engineering EnvironmentConfigurable from WinCC Flexible Standard Version 2007 or higher—and compatible with WinCC Comfort in the TIA Portal—the Siemens 6AV6644-0AC01-2AX1​ benefits from Siemens’ industry-leading HMI engineering ecosystem. Developers can leverage a rich library of pre-configured screen objects, graphical symbols, trend curves, bar graphs, and text/bitmap elements to rapidly build sophisticated operator interfaces. Support for 16 online languages (with 32 languages per project) makes the Siemens 6AV6644-0AC01-2AX1​ an ideal choice for multinational operations requiring localized operator interfaces.