Siemens 6AV6642-0DC01-1AX1 OP 177B DP – 5.7" Blue-Mode STN HMI, Touch + 32 Keys, MPI/PROFIBUS DP

Siemens 6AV6642-0DC01-1AX1 OP 177B DP – 5.7″ Blue-Mode STN HMI, Touch + 32 Keys, MPI/PROFIBUS DP

Product Overview

The 6AV6642-0DC01-1AX1 is a Siemens SIMATIC OP 177B DP, a 5.7-inch Blue-Mode STN HMI panel that occupies the mid-duty tier of Siemens' 177-series operator devices, sitting between the entry-level TP 177micro and the larger OP/TP 270/277 generation. Unlike the TP 177micro which is touch-only, the 6AV6642-0DC01-1AX1 adopts a hybrid control philosophy — analog resistive touch overlay paired with a 32-key membrane keyboard (26 keys LED-backlit, plus system keys and numeric/hex input capability), giving operators both direct tactile function access and graphical interaction on a single 5.7" face. The display is a 4-blue-level STN panel at 320 × 240 resolution, lit by a CCFL backlight rated at 50,000 hours at 25 °C. Internally, the 6AV6642-0DC01-1AX1 runs on an ARM 200 MHz processor with 2 MB of Flash/RAM allocated for user project data, executing under Windows CE and configured through WinCC Flexible 2005 or 2008 (also compatible with the Micro HSP package for S7-200-oriented builds). Connectivity centers on a native MPI/PROFIBUS DP port at up to 12 Mbps — the "DP" suffix — alongside RS422, RS485, one USB host, and an optional RS232. From E-stand 016 onward, a combined MMC/SD card slot is activated when paired with WinCC Flexible 2008 SP1, adding removable recipe and data-log mobility. The front bezel carries IP65 / NEMA 4x / NEMA 12 when properly mounted, with certifications spanning CE, GL, ABS, BV, DNV, LRS, FM Class I Div. 2, UL, CSA, cULus, and EX Zones 2 & 22. In the Siemens HMI lineage, the 6AV6642-0DC01-1AX1 has been superseded by the MP 177 / KTP generation, but it remains a heavily specified MRO spare for plants that standardized on OP 177B during the mid-2000s S7-200 / S7-300 expansion wave. Its hybrid touch-plus-keys layout and Blue-Mode STN economy make it a pragmatic retain-in-service choice where a color TFT upgrade would trigger unnecessary re-qualification, and where the 32 programmable keys still match the original panel cutout and operator muscle memory.

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Technical Specifications

Parameter Name	Parameter Value
Product Model	6AV6642-0DC01-1AX1
Manufacturer	Siemens
Product Type	HMI Operator Panel (OP 177B DP)
Display Type	5.7″ STN, Blue-Mode (4 blue levels)
Resolution	320 × 240 pixels
Touch Type	Analog resistive
Function Keys	32 (membrane), 26 with LED; plus system keys, numeric/hex input
Processor	ARM, 200 MHz
User Memory	2 MB Flash/RAM
Power Supply	24 V DC
Rated Current	0.24 A
Inrush I²t	0.5 A²·s
Backlight MTBF (25°C)	~50,000 h (CCFL)
Interfaces	MPI/PROFIBUS DP (≤12 Mbps), 1× RS422, 1× RS485, 1× USB, optional RS232
Card Slot	Combined MMC/SD (from E-stand 016 + WinCC Flex 2008 SP1)
Front Protection	IP65, NEMA 4x, NEMA 12
Configurable With	WinCC Flexible 2005 / 2008 (Micro HSP supported)
Hazardous Area	EX Zone 2, EX Zone 22, FM Class I Div. 2

Main Features and Advantages

Hybrid touch-plus-keys for dual interaction modes

The signature of the 6AV6642-0DC01-1AX1 is the 32-key membrane array — 26 keys carry dual-color LEDs programmable from WinCC Flexible, enabling dynamic “standby / active / fault” indication per key. System keys (acknowledge, menu navigation) and a numeric/hex input layer round out the keyboard. Overlaying this is the analog resistive touch on the 5.7″ STN, so the same screen can show alarm banners and trend strips while dedicated keys handle mode-select, start/stop, or recipe-advance without diving through screen hierarchies. For gloved operators on plant floors — bottling lines, extrusion cells, pump skids — this hybrid layout often beats pure-touch panels because critical actions have a physical detent.

Blue-Mode STN: legibility without TFT cost

The 6AV6642-0DC01-1AX1 uses a 4-blue-level STN rather than a color TFT. While this sounds dated, Blue-Mode STN has specific merits in legacy-retention: it reads cleanly under strong overhead factory lighting where TFT viewing angles can wash out, and the monochrome-blue palette forces HMI designers toward high-contrast, standards-compliant screen layouts (white tags on dark blue, reverse-video alarms) that remain readable at distance. For machines where the HMI primarily shows tag values, alarm lists, recipe step counters, and small trend strips, the 320×240 canvas is sufficient, and the 50,000-hour CCFL backlight (significantly shorter than Comfort-series LED but adequate for single-shift duty) keeps life-cycle cost low.

Connectivity breadth in a small footprint

Despite the 5.7″ size, the 6AV6642-0DC01-1AX1 carries a surprisingly rich bus set: MPI/PROFIBUS DP at 12 Mbps for direct coupling to S7-300/S7-400 racks or S7-200 PPI-over-MPI setups; RS422 and RS485 for third-party drives, weigh scales, or barcode readers; USB host for mouse/keyboard/service stick; and optional RS232. The MMC/SD combo slot (E-stand 016+) accepts Siemens MMC or standard SD for recipe transfer and project backup — a meaningful upgrade over earlier OP/TP generations that relied solely on transfer cables. The 6AV6642-0DC01-1AX1 thus fits both greenfield S7-200 micro-plants and retrofit insertions onto S7-300 MPI backbones without external protocol gateways.

Certification depth for regulated sites

Few 5.7″ panels carry the certification portfolio of the 6AV6642-0DC01-1AX1: marine (GL, ABS, BV, DNV, LRS), North American (UL, CSA, cULus), hazardous area (FM Class I Div. 2, EX Zone 2/22), and NEMA 4x washdown front. This makes the panel defensible in food & beverage, water treatment, marine deck machinery, and batch-pharma skids where a “basic” HMI wouldn’t pass spec review. The IP65 front with NEMA 4x rating holds up behind a proper gasket in spray-zone cutouts.

Engineering continuity

Because the 6AV6642-0DC01-1AX1 configures in WinCC Flexible 2005/2008 (including the Micro HSP path), plants that still run PG stations with WinCC Flexible can maintain, clone, and redeploy OP 177B projects without buying TIA Portal licenses. WinCC Flexible projects also migrate upward to Comfort/Unified with manageable rework when the plant eventually modernizes. The 2 MB user memory supports ~250 screens, 500 alarms (80-char each, 8 process values/alarm, 128-entry ring buffer non-battery-backed), 20 fields/screen, 500 text objects, 5 online languages — sufficient for a standalone machine HMI without sprawling P&ID needs.