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Electronic Design

Freescale MRAM Picked For Siemens HMI

Siemens’ Industry Automation Division has incorporated the Freescale Semiconductor 4-Mbit MRAM device into Siemens’ Simatic Multipanel MP 277 and MP 377 human-machine interface (HMI). Siemens performed extensive qualification testing before choosing Freescale’s magnetoresistive RAM for the HMI targeting industrial automation systems.

The device provides an easy-to-use, non-volatile memory (NVM) that maintains software-programmable logic controller (SoftPLC) process data for the HMI platforms without battery backup. The user-programmable SoftPLC option enables the implementation of a comprehensive, expandable machine-control system in a small form-factor that helps reduce overall system cost. The multi-panels allow the integration of several automation tasks on a single platform using the SoftPLC.

“Freescale’s MRAM device provides the non-volatility, performance, and reliability that we need to add user-programmable features to our mid- and high-end display products for the industrial automation market,” said Ingmar Binder, project manager for HMI R&D at Siemens Industry Automation Div.

The Simatic multi-panel HMI series includes extensive connectivity options and a non-volatile alarm buffer that does not require an additional backup battery in the event of an unexpected power loss. The touch screens and keyboards enable the multi-panels to be used for precise, efficient operator control and monitoring.


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