The Siemens 6AV6640-0BA11-0AX0 is a SIMATIC HMI OP 73micro keypad-operated operator panel developed for local visualization and control of SIMATIC S7-200 machines. Its 3-inch LCD STN display provides 160 × 48-pixel resolution and two display colors, while eight system keys and four freely configurable soft keys support compact operator tasks. The 6AV6640-0BA11-0AX0 operates at 24 V DC over a 20.4–28.8 V DC range, uses approximately 80 mA typically, provides 128 KB of working memory, and supports IP65 front protection when correctly mounted.

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