I�C was made to communicate over Lick between printed circuit boards and is a simple, 8-bit serial data bus. In the meantime, it isn’t only PCB-mountable pressure sensors that utilize the I�C signal for data transfer, but also pressure sensors remote from customer electronics.
Remote sensors will often have the benefit of being less sensitive to contaminated or aggressive media and having the capacity to measure directly at the procedure. In the case of sensors mounted directly on the circuit board, the sensor element is, oftentimes, exposed right to the medium. With remote sensors, steel or ceramic generally serve as the wetted surface.
I�C circuit
The I�C bus, alongside the two supply lines, requires only two further lines:
SCL (serial clock line)
SDA (serial data line)
Additional possibilities through I�C
The I�C bus is a well-known standard in electronics, offering additional possibilities for communication with a pressure sensor than having an analogue signal:
In the info protocol, in addition to the pressure value, a temperature value and diagnostic information (for instance an integrity test of the info transfer) could be transmitted via a status byte.
Several pressure sensors can be linked to a bus line as ?slaves? to the customer electronics that functions as a ?master?.
On the client side, in contrast to the application of pressure sensors with analogue signals, the analogue-to-digital conversion of the pressure value for further signal processing is unnecessary because the pressure value has already been within digital form. This contributes to faster and easier signal processing.
The electronics for communication could be built with standard components readily available on the market.
Often, I�C signal pressure sensors may also be optimised to take less energy, making them perfect for battery-powered applications. In the WIKA portfolio, for example, this pertains to the MPR-1 pressure sensor module.
Boundary conditions with the use of I�C
Since I�C isn’t a fieldbus, long wire lengths are not recommended. The utmost wire length depends, in detail, on the operating environment and the corresponding disturbing influences. I�C communication is most beneficial used in projects where in fact the pressure sensor or the pressure sensor module is integrated into the customer product and therefore protected against external influences. It should also be noted that with any digitally processed signal, the response time because of discrete-time sampling will undoubtedly be somewhat slower than for an analogue, continuous signal.
Note
Your contact person will be happy to assist you to with any further questions on digital interfaces.
Distributed Intelligence
Distributed Intelligence on the integration of pressure sensors into hydraulic systems
Fill below form and we’ll send you the whitepaper ?Distributed Intelligence?.
Name
Company
E-mail
Send
We?re committed to your privacy. We?ll use your information to get hold of you about our services and products. E mail us at socialmedia@wika.com to revoke your permission to use your information.