The SIMATIC HMI 6AV6881-0AU14-1AA0 is the US-layout n-key rollover keyboard in the 6AV6881 desktop series. Unlike the 2-key INOX variants, this model uses a plastic TKL-105 housing and supports full simultaneous multi-key input via the 10-finger system — making it the right choice when typing speed and multi-key commands matter more than industrial-grade physical protection.

What does n-key rollover mean in an HMI context?

N-key rollover means every key press is registered independently, regardless of how many other keys are held down simultaneously. For an HMI operator, this matters when executing multi-key shortcuts — alarm acknowledgment combinations, screen navigation chords, or data entry sequences that require holding a modifier while pressing several other keys. A 2-key rollover keyboard drops inputs beyond the second simultaneous press; this keyboard registers them all. The 10-finger system designation means even a full two-hand chord will be captured correctly.

When should I choose this plastic model over the INOX variant?

Choose this keyboard when your operator station lives in a clean, climate-controlled control room rather than a shop floor. The plastic TKL-105 housing is lighter, the keyboard costs roughly one-seventh of the INOX equivalent, and you gain n-key rollover — a capability the INOX models trade away for physical robustness. If your environment includes frequent washdowns, vibration, impact risk, or exposure to corrosive agents, the INOX model (1DB0 for US layout, 0DB0 for German) is the appropriate choice.

Frequently Asked Questions

Is this keyboard IP-rated?

Siemens does not publish a formal IP rating for the plastic TKL-105 models. If you require a defined ingress protection rating, the INOX variants in this series offer IP67-rated USB connectors and are built for washdown environments.

What is the difference between 1AA0 and 0AA0?

1AA0 (this model) has US (QWERTY) layout. 0AA0 has German (QWERTZ) layout. Both share the same plastic TKL-105 construction, n-key rollover, and USB interface.