Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 6AV6644-0AA01-2AX0 |
| Manufacturer | Siemens |
| Product Type | HMI Multipanel, Touch Only (SIMATIC MP 377 12″) |
| Display | 12.1″ TFT color, 800 × 600 px, 65,536 colors |
| Touch Type | Analog resistive |
| Operating System | Windows CE 5.0 |
| User Memory | 12 MB (flash/RAM), project + data |
| Interfaces | 1 × RS422, 1 × RS485, 2 × Ethernet (RJ45), 2 × USB, 1 × CF slot, 1 × SD/MMC slot (≤128 MB) |
| Protocols | MPI, PROFIBUS DP, TCP/IP, Sm@rtServer/Sm@rtService, MODBUS (via Flexible drivers) |
| Supply Voltage | 24 V DC, 1.5 A rated, 36 W |
| Backlight MTBF | ~50,000 h @ 25 °C |
| Protection | IP65 / NEMA 4 / NEMA 12 front (installed), IP20 rear |
| Certifications | CE, cULus, FM Class I Div. 2, EX Zone 22, C-Tick |
| Dimensions (W × H × D) | Approx. 310 × 332 × 126 mm |
| Weight | Approx. 2.5 kg |
| Lifecycle Status | Discontinued for new orders (Oct. 2014); spare-part availability via aftermarket |
Main Features and Advantages
The 6AV6644-0AA01-2AX0 holds its ground in legacy cabinets because it combines a generously sized 12.1″ TFT with a port density that newer Basic-line panels can’t match at the same price tier. The two RJ45 Ethernet ports are a standout—unlike entry panels that give you one Ethernet and call it done, the 6AV6644-0AA01-2AX0 lets you land the S7-300/400 connection on one port and a cell-network router or remote-access gateway on the other, or simply daisy-chain a second HMI, all while keeping MPI/PROFIBUS on the serial side for mixed-protocol cabinets. RS422 and RS485 alongside the Ethernet pair mean printer, barcode scanner, weigh-scale, or a third-party drive can all terminate on the same panel without external protocol gateways.
Software-wise, the 6AV6644-0AA01-2AX0 is a WinCC Flexible 2007+ native device. For maintenance teams that still have Flexible licenses and project archives, this is a feature not a bug—there is no TIA Portal retargeting headache unless you choose to migrate. The 12 MB user memory was generous for its era (compare: MP 277 12″ had 6 MB), allowing larger tag counts, longer alarm buffers, and embedded bitmap/recipe data without resorting to external data blocks. Sm@rtServer is included at the firmware level, so remote VNC viewing from a desktop or tablet—subject to Flexible license tier—comes native, a capability plants lean on heavily for multi-site support contracts.
Durability specifications also favor the 6AV6644-0AA01-2AX0 in tougher environments. The analog resistive touch tolerates gloved operation, the 50,000-hour backlight MTBF @25°C translates to several years even in warmer cabinets, and the NEMA 4 / NEMA 12 / EX Zone 22 certification bundle puts the panel into oil & gas skids, chemical batch cells, and grain-handling auxiliaries where a non-hazardous-rated HMI wouldn’t pass the HAZOP. The 2.5 kg mass and 310×332 mm bezel mean cutout dimensions are established and cloneable across the MP 377 family, simplifying spare rotation.
The honest caveat: the 6AV6644-0AA01-2AX0 is WinCE 5.0, not WinCE 6.0 (the Comfort line), and definitely not the Windows Embedded Compact 7 / Unified stack. USB stick formatting, browser objects, and scripting reach are all Flexible-era. For new designs Siemens points to TP1200 Comfort or MTP1200 Unified; for existing MP 377 lines, keeping 6AV6644-0AA01-2AX0 on the spare crib is the economical call.
Application Field
The 6AV6644-0AA01-2AX0 is found wherever a 12″ touch HMI with MPI/PROFIBUS + Ethernet dual personality was specified before TIA Portal became default—automotive body-shop cell panels, powertrain test stands, extrusion line main consoles, pharmaceutical batch-skid local HMI, food & beverage filler/capper stations, packaging OEM main panels, and chemical dosing skids in EX Zone 22–adjacent areas. In steel and aluminum processing, the 6AV6644-0AA01-2AX0 often serves as the operator window onto a S7-400 in a rolling-mill aux cell, where 12″ is enough for a simplified P&ID, alarm bar, and recipe recall without crowding the bay.
Machine builders standardized the 6AV6644-0AA01-2AX0 on mid-to-large OEM machinery (strappers, stretch-wrappers, palletizers, CNC loader/unloader cells) because the cutout is reusable across the MP 377 family—a builder could spec 12″ for the main station and 9.6″ for satellite stations using the same gasket/mount logic. Retrofit projects upgrading S5→S7-300 often carried the 6AV6644-0AA01-2AX0 forward because Flexible could still talk S5 via the right drivers, delaying a full HMI rewrite by a decade.
Remote-access scenarios are another sweet spot. With Sm@rtServer enabled, the 6AV6644-0AA01-2AX0 becomes a VNC server onto the Flexible runtime—OEMs with multi-plant service contracts use this to shadow operator screens from a central support desk, and the twin Ethernet ports keep the VNC traffic on a separate NIC from the PLC link. For any plant still running WinCC Flexible as the HMI authority, the 6AV6644-0AA01-2AX0 remains the correct spare-form-factor answer until a deliberate migration budget is approved.
Related Products
- 6AV6644-0BA01-2AX0 – MP 377 12″ Key+Touch Multipanel, hybrid sibling to the touch-only 6AV6644-0AA01-2AX0 when physical keys are preferred.
- 6AV6645-0AA01-2AX0 – MP 377 9.6″ Touch, smaller sibling in the same MP 377 family, often paired with the 12″ on multi-station machines.
- 6AV6646-0AA01-2AX0 – MP 377 15″ Touch, next step up when 12″ is too cramped for P&ID + alarm + trend.
- 6AV6647-0AA01-2AX0 – MP 377 19″ Touch, largest MP 377, panel-shop main-console grade.
- 6AV2124-0MC01-0AX0 – TP1200 Comfort 12″ widescreen, the direct TIA Portal–era successor direction for 6AV6644-0AA01-2AX0 (cutout differs; project retarget required).
- 6AV2128-3MB06-0AX1 – TP1200 Comfort 2nd gen, refined successor with updated internals vs. the -2124 line.
- 6AV2127-0GB06-0AX0 – KTP1200 Basic, lower-cost 12″ alternative when Comfort features exceed scope and Flexible→TIA migration is already underway.
- 6ES7315-2EH14-0AB0 – S7-315-2 PN/DP, the most common S7-300 partner CPU for 6AV6644-0AA01-2AX0 over MPI/PROFIBUS + Ethernet.
