A Human Machine Interface, or HMI, typically includes a number of components required to signal and control the state of industrial automation equipment. These interface products can range from a basic LED status indicator to a 20-inch TFT panel with a touchscreen interface.
Unsurprisingly, HMI applications require mechanical robustness and resistance to water, dust, moisture, a wide range of temperatures and, in some environments, secure communication with Ingress Protection (IP) ratings up to IP65, IP67 and IP68.
We at Atmel offer a versatile and extensive portfolio of devices that can be used to design various aspects of a human machine interface.
“For example, our unique capacitive QTouch technology, SAM9 microprocessors and CryptoAuthentication devices enable designers to meet the above-mentioned requirements and more with an optimized BOM,” an Atmel engineering rep told Bits & Pieces.
“Plus, Atmel tech supports high source and sink output IO capabilities up to 60mA for direct drive of LEDs, with high-speed PWM units enabling LED dimming and screen back-lighting. And due to its superior field penetration, our touch technology operates through 6mm thick, non-conductive surfaces.”
The engineering rep also noted that the optimized signal-to-noise ratio of the Atmel QMatrix touch technology helps make the design immune to water, moisture, or dust – enabling operators to use gloves. In addition, Atmel’s capacitive touch tech eases design of full hermetic or sealed products, while power efficiency works to minimize heat dissipation.
“It should also be noted that Atmel’s touch spread spectrum frequency implementation helps designers meet electro-magnetic emission requirements,” the engineering rep continued. “And that is why our industrial microprocessor product portfolio with integrated LCD, combined with the our QTouch technology, are the ideal candidates for an engineer’s next control panel design. On the security side, Atmel’s CryptoAuthentication family of hardware security devices provides cost effective solutions for authenticated and encrypted communications between HMI and industrial equipment.”
Specific examples of Atmel tech powering HMI devices? Well, LED indicators and mechanical switches are a leading HMI for industrial applications – with Atmel’s AVR and AT91SAM microcontrollers offering a variety of benefits. Similarly, Atmel’s capacitive touch technology for HMI helps protect industrial interface modules, while increasing design flexibility and enhancing UI look and feel. Meanwhile, Atmel’s industrial control panels with LCD Displays provides HMI operators with an efficient, flexible way to monitor and control increasingly complex automated processes, with hardware security products protecting firmware integrity from tampering to assure continuous and reliable performance.
“Atmel HMI solutions help reduce board space and enable a lower BOM, simply because they do not require a separate LCD controller chip, or an external resistive touchscreen chip, with standard DDR2 external memory providing lower cost and longer availability,” the engineering rep added.
“Last, but certainly not least, Atmel solutions also provide high performance with high-speed communication and are available with ready-to-use software support. Of course, an evaluation kit is available for each Atmel SAM9 with free Linux distribution and Microsoft Windows Embedded CE BSP.”
Interested in learning more about Atmel’s tech portfolio for powering HMI devices? A complete device breakdown is available here.