New architecture for energy-autonomous sensors

18 November 2008

EnOcean launched its Dolphin system architecture at electronica 2008

Designed to enable energy-autonomous actuators, bidirectional communication of sensors and innovative routing concepts to create the foundations for a variety of new products and applications, Dolphin allows on-demand matching and continuous optimisation of central system features such as energy budget, peripheral functionalities and wireless communication.

The length of wireless telegrams, for example, is minimised dynamically to the data content for transmission, and in programming only those software function blocks actually needed by the user are saved to memory. EnOcean technology is already being used to wirelessly link hundreds of thousands of energy-autonomous sensors in buildings worldwide. The Dolphin architecture was developed to enable non-proprietary systems to match the increasing demands of very different applications, and grow in their functionality together with the demands of such applications. The launch of the Dolphin platform marks an entry into new industrial control and automation systems, an expansion of existing applications to save energy, to enhance comfort, convenience and security, for access control and consumption data metering in building services. Dolphin system architecture, through its modularity, is ideally suited for future demands such as encryption or meshNet routing.

New EnOcean modules based on the Dolphin system architecture enable bidirectional communication of energy-autonomous sensors. The bidirectional plug&play TCM 300 transceiver module for EnOcean wireless systems has half the standby power requirement compared to its predecessor (2.5 to 3.3 V, receiving approximately 30 mA and transmitting approximately 15 mA) cutting the costs for the power supply and reducing power consumption by around 50%.

Compared to its forerunner STM 110, the 10bit A/D converter produces greater measuring accuracy and four times the resolution for sensors. An optional repeater function, activated by a pin, reduces the number of system components needed and simplifies start-up. The mini operating system and new API enable straightforward programming of applications. Parameters can be changed using software updates during installation or in operation.

The STM 300 is the bidirectional EnOcean module for energy-autonomous device applications. The STM 300 differs from the TCM 300 through its extensive energy management of miniature converters which harvest energy from differences in temperature, rotation, light or vibration. Central parts of the integrated circuit are the ultra-low-power wake-up, threshold switch and voltage limiter. Like its predecessor, the STM 110, the STM 300 has a number of basic plug&play operating functions removing the need to program STM before start-up. These functions are three analog inputs, four digital inputs, configurable wake and presence cycles and wake-up pins.

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