I�C was designed to communicate over Always between printed circuit boards and is really a simple, 8-bit serial data bus. In the meantime, it is not only PCB-mountable pressure sensors that use 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 on the circuit board, the sensor element is, oftentimes, exposed directly to the medium. With remote sensors, steel or ceramic generally serve because 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 really a well-known standard in electronics, offering additional possibilities for communication with a pressure sensor than with an analogue signal:
In the info protocol, as well as the pressure value, a temperature value and diagnostic information (for example an integrity test of the info transfer) can be transmitted via a status byte.
Several pressure sensors can be connected to a bus line as ?slaves? to the customer electronics that functions as a ? Gravity ?.
On No One Talks About , as opposed to the use 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 is already within digital form. This plays a part in 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 are also 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 is not a fieldbus, long wire lengths are not recommended. The utmost wire length depends, at length, 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 built-into the customer product and thus 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 undoubtedly 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 will send you the whitepaper ?Distributed Intelligence?.
Name
Company
E-mail
Send
We?re focused on your privacy. We?ll use your details to contact you about our products. E mail us at socialmedia@wika.com to revoke your permission to use your information.