Devices that self power and can keep transmitting for decades. Self meshing.
The Pressac Sensing V3 1 Channel CT Clamp is designed to measure and report the AC current flowing in a single channel. Powered from the measured conductor, the measured current in the channel is reported every 30 seconds using the industry standard, wireless EnOcean® protocol. With a maximum measurable current of 60A the Pressac Sensing V3 1 Channel CT Clamp is easily installed with no disturbance to the measured conductor.
• Simply clip around any single core cable
• Requires no batteries or wiring
• Requires no interruption to the power supply
• Transmits electrical current value (Amperes) wirelessly using EnOcean® technology
The Wireless Relay Receiver Module allows lights and fans to be controlled by AD HOC Battery-free Wireless Light Switches, remotes and sensors (each sold separately). It is an in-line relay that is wired between the light fixture and power source and helps simplify advanced wireless lighting control. Relay receivers learn” the addresses of transmitting switches or sensors. Once programmed (using a simple single-button programming procedure), the receivers respond to ON/OFF commands sent by transmitters stored in memory. This module can be linked with up to 30 wireless transmitters.
Seebeck effect = thermal gradient energy produces electrical
Peltier effect = electrical current across a conductor junction produces cooling / heating.
How it works
When DC voltage is applied to the module, the positive and negative charge carriers in the pellet array absorb heat energy from one substrate surface and release it to the substrate at the opposite side. The surface where heat energy is absorbed becomes cold; the opposite surface where heat energy is released, becomes hot. Reversing the polarity will result in reversed hot and cold sides.
Additional Applications not related to EnOcean – Peltier Modules for Compact, Precise, suitable for sealed units since they are not dependent on air, high reliability. Suitable for medical and other challenging environments.
Understanding and Using Peltier Modules for Thermal Management
Peltier Application Note
When applied is based on AES128.
Unlike with wired control systems – information and control commands now flow freely over the air and are subject to external monitoring and potentially even malicious external commands. Strong security mechanisms are therefore required to mitigate these threats in sensitive applications.
The EnOcean standard 868 MHz sensor modules integrate these state-of-the-art data encryption mechanisms to meet the requirements of specific applications such as monitoring or alert sensor systems. These enhanced security mechanisms can optionally be activated to prevent different types of attacks, including replay and eavesdropping attacks or forging of messages. Shipped in standard mode, the encrypted data transmission can be activated by simply pressing the learn button for ten seconds. If needed, the security mode can be deactivated by pressing and holding the learn button again. Also a receiver that decodes encrypted telegrams can still process standard telegrams enabling OEMs to effortlessly include enhanced data security in their existing EnOcean-based portfolio.
One fundamental problem with both content protection and content authentication is that using the same input data (plain text) with the same key always yields the same encrypted data and same signature. In order to prevent this type of attack, either the data or the key must continuously change to ensure that identical input data does not create The mechanism used by the transmitter to change data or key must be known to the r ceiver in order to correctly decrypt and authenticate received data telegrams. One common approach is to use the secret key together wit to generate a dynamic key.
1. Feature: content protection – implemented with: data encryption
2. Feature: content authentication – implemented with: CMAC – cipher based message authentication
3. Feature: dynamic content modification – implemented with: RLC – rolling code