Siemens 6AV6644-0AA01-2AX0 SIMATIC MP 377 12″ Touch — 65K Color TFT, WinCE 5.0, PROFINET + PROFIBUS-DP

Product Overview

The 6AV6644-0AA01-2AX0 is Siemens' SIMATIC MP 377 12″ Touch Multi Panel, the Windows CE 5.0-based color-touch HMI that succeeded the MP 370 family and served as Siemens' flagship 12″ panel in the WinCC flexible era (2007–2015). Equipped with a 12.1″ TFT displaying 65,536 colors at 800 × 600 (SVGA) and an analog-resistive touch overlay, the 6AV6644-0AA01-2AX0 targets mid-to-high complexity visualization on SIMATIC S7-300, S7-400, S7-1200, S7-1500, M7, S5, TI 505, WinAC, SINUMERIK, and SIMOTION platforms. Where the earlier MP 370 12″ was limited to MPI/PROFIBUS-DP and RS232, the 6AV6644-0AA01-2AX0 adds dual RJ45 Industrial Ethernet ports with native PROFINET IO, EtherNet/IP, and Modbus TCP — a pivotal upgrade for plants migrating from PROFIBUS-only to mixed PROFINET/PROFIBUS backbones without replacing the HMI layer. Internally, the panel carries 12,288 KB (12 MB) Flash/RAM user memory plus a matching 12,288 KB option partition (24 MB total), alongside a CF card slot and an MMC/SD slot (≤128 MB) for recipe/alarm archival and project cloning. Configuration is handled in WinCC flexible 2007 or later (2008 SP2/SP3), with support for up to 32 languages, VBScript fragments, Sm@rtServer remote access, and cross-platform third-party drivers (Allen-Bradley DF1/DF485, Mitsubishi FX, Omron, Modicon Modbus, etc.). Power is 24 V DC at 1.5 A (≈36 W), the front bezel is IP65 / NEMA 4 / NEMA 12, and the backlight MTBF is ~50,000 hours at 25 °C. Although Siemens blocked new deliveries from 01.01.2015 (spare-part channel only, eventually superseded by TP1200/1500 Comfort under TIA Portal), the 6AV6644-0AA01-2AX0 remains a high-demand like-for-like spare where re-qualifying a validated WinCC flexible project on TIA Portal is commercially or regulatorily unjustifiable — especially in pharma, food, and batch-process cells carrying 10–15 year old MP 370/MP 377 footprints.

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Technical Specifications

Parameter Name	Parameter Value
Product Model	6AV6644-0AA01-2AX0
Manufacturer	Siemens AG
Product Type	Multi Panel HMI / 12″ Touch Operator Interface
Series	SIMATIC MP 377
Display Type	TFT color, 65,536 colors
Screen Size	12.1″ diagonal (246 × 184.5 mm viewable)
Resolution	800 × 600 pixels (SVGA)
Touch Technology	Analog resistive (USB mouse/keyboard/barcode supported)
Operating System	Windows CE 5.0
User Memory	12,288 KB Flash/RAM + 12,288 KB option memory
Supply Voltage	24 V DC (20.4 – 28.8 V range)
Rated Current	1.5 A
Power Consumption	~36 W
Interfaces	1× RS422, 1× RS485, 2× Ethernet RJ45 (PROFINET), 2× USB host, 1× CF slot, 1× MMC/SD slot (≤128 MB)
Supported Protocols	PROFINET IO, PROFIBUS DP, MPI, TCP/IP, EtherNet/IP, Modbus (RTU/TCP), Sm@rtServer
Real-Time Clock	Hardware RTC, battery-backed, synchronizable
Front / Rear Protection	IP65 / NEMA 4 / NEMA 12 (front, installed) ; IP20 (rear)
Operating Temperature	0 °C to +50 °C (max ±35° tilt without forced ventilation)
Storage Temperature	–20 °C to +60 °C
Humidity	≤85 % RH (non-condensing)
Housing Front (W × H)	335 × 275 mm
Mounting Cut-Out (W × H)	310 × 248 mm
Device Depth (excl. front panel)	72 mm
Weight	~3.8 kg
Configuration Software	WinCC flexible 2007 / 2008 SP2+ (TIA Portal indirect; requires migration)
Certifications	CE, cULus, FM Class I Div. 2, C-Tick
Lifecycle Status	Blocked for new delivery (01.01.2015), spare-part only; succeeded by TP1200 Comfort

Main Features and Advantages

Dual Ethernet with native PROFINET IO — the MP 377’s defining leap over MP 370.

The 6AV6644-0AA01-2AX0 carries two RJ45 Industrial Ethernet ports that can operate concurrently: one ties to a S7-1200/1500 PROFINET controller at 100 Mbps while the second lands on a plant-wide TCP/IP or EtherNet/IP segment for SCADA uplink, Sm@rtServer remote viewer, or printer. This dual-homing eliminates the PCI-CP1613/CP343 workaround that MP 370 users endured. For mixed-vendor cells, the MPU also speaks EtherNet/IP and Modbus TCP on the same RJ45 pair, so an Allen-Bradley CompactLogix or a Modbus-TCP power-meter can sit on the same cable plant as the S7-400 — a flexibility the MP 370 12″ simply lacked.

65,536-color TFT and responsive resistive touch in a proven cut-out.

Where MP 370 topped out at 256 colors, the 6AV6644-0AA01-2AX0 renders 16-bit color, making gradient-filled process graphics, photo-realistic machine mockups, and color-coded alarm states visibly cleaner on a 12.1″ SVGA canvas. The 4-wire analog-resistive digitizer tolerates gloved operation and survives the industrial key-press cycle count typical of polyester-faced overlays. Critically, the cut-out (310 × 248 mm) is mechanically compatible with MP 370 12″ Touch and MP 277 10″ Touch apertures, so a 6AV6644-0AA01-2AX0 drops into a cabinet door originally machined for its predecessor without re-cutting — only the 72 mm rear depth (vs. MP370’s ~85 mm) needs verification, and in practice the MP377 is shallower, which relieves rear clearance.

24 MB effective memory + dual removable-storage slots.

12,288 KB base plus 12,288 KB option gives 24 MB of Flash/RAM for screens, alarms (2000+ each), recipes, and trend archives — double the MP 370’s footprint. The CF card slot and MMC/SD slot (≤128 MB) allow bulk archival of batch logs, alarm CSVs, and project clones without a PC. For validated pharma skids, this means the 6AV6644-0AA01-2AX0 can dump a 30-day batch-alarm set to CF at shift change, then the QA clerk pulls the card — no network share, no audit trail gap.

Broad multi-vendor driver set and Sm@rtServer.

Beyond Siemens S7, the panel’s WinCE 5.0 runtime includes drivers for S5, TI 505, WinAC, SINUMERIK, SIMOTION, Allen-Bradley (DF1 & DF485), Mitsubishi FX, Omron (LINK/Multilink), and Modicon Modbus. Sm@rtServer (license-activatable) pushes the 6AV6644-0AA01-2AX0 screen to a remote PC or tablet over the plant LAN, useful for centralized supervision of scattered machines without a full SCADA layer.

Engineering continuity where TIA migration is a non-starter.

Plants sitting on WinCC flexible 2008 projects — especially validated pharma/food lines — often reject a forced move to TIA Portal/WinCC Unified because every screen object, alarm class, and recipe mapping would need rework and re-validation. The 6AV6644-0AA01-2AX0 keeps the .hmi file alive: open, verify tags, download over Ethernet or CF, done. Even S7-1200/1500 can be reached natively over PROFINET, so the PLC side can modernize while the HMI stays on the proven runtime.