I�C was designed to communicate over short distances between printed circuit boards and is a simple, 8-bit serial data bus. In Ass Kicking , it is not only PCB-mountable pressure sensors that utilize the I�C signal for data transfer, but also pressure sensors remote from customer electronics.
Remote sensors usually have the advantage of being less sensitive to contaminated or aggressive media and to be able to measure directly at the process. In the case of sensors mounted on the circuit board, the sensor element is, oftentimes, exposed directly to the medium. With remote sensors, steel or ceramic generally serve as the wetted surface.
I�C Loathsome 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 really a well-known standard in electronics, offering additional possibilities for communication with a pressure sensor than with an analogue signal:
In the data protocol, in addition to the pressure value, a temperature value and diagnostic information (for example an integrity test of the data transfer) can be transmitted via a status byte.
Several pressure sensors can be linked to a bus line as ?slaves? to the client electronics that functions as a ?master?.
On the customer side, as opposed to the utilization of pressure sensors with analogue signals, the analogue-to-digital conversion of the pressure value for further signal processing is unnecessary since 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 easily 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 instance, this applies to the MPR-1 pressure sensor module.
Boundary conditions by using I�C
Since I�C is not a fieldbus, long wire lengths aren’t recommended. The maximum wire length depends, in detail, on the operating environment and the corresponding disturbing influences. I�C communication is most beneficial used in projects where the pressure sensor or the pressure sensor module is built-into the customer product and therefore protected against external influences. It will also be noted that with any digitally processed signal, the response time because of discrete-time sampling will be somewhat slower than for an analogue, continuous signal.
Note
Your contact person will be happy to assist you to with any more 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 details to get hold of you about our services and products. E mail us at socialmedia@wika.com to revoke your permission to utilize your information.