PSI5
| PSI5 | |
|---|---|
| Family: | Fieldbus |
| current version: | 2.3 (February 1, 2018) |
| Developer: | PSI5 Steering Committee |
PSI5 ( P eripheral S ensor I nterface 5 ; German “ peripheral sensor interface 5 ”) is a digital interface for sensors .
PSI5 is based on a two-wire line and is used in automotive electronics to connect external sensors to electronic control units. Point-to-point and bus configurations with asynchronous and synchronous communication are supported.
function
PSI5 works according to the principle of the current interface with modulation of a transmission current for data transmission to the supply line. Due to the relatively high signal current of 26 mA and the bit coding in Manchester code , a high level of interference immunity is achieved, which means that the use of an inexpensive, twisted two-wire line for cabling is sufficient. Data words each consist of two start bits, 8 to 24 data bits and a parity bit or 3-bit CRC ( cyclical redundancy check ).
standardization
With the aim of an open standard, PSI5 emerged from existing, proprietary developments by Autoliv , Robert Bosch GmbH and Continental AG . The first joint publication took place at the “Sensor” trade fair in Nuremberg in May 2005. The standardization received further support in the summer of 2006 from Siemens VDO and, since 2007, from Freescale and TRW .
literature
- Werner Zimmermann and Ralf Schmidgall: Bus systems in vehicle technology - protocols, standards and software architecture . Vieweg + Teubner, 5th edition, 2014, ISBN 978-3-6580-2418-5
Web links
- PSI5 website ( Memento from July 5, 2019 in the Internet Archive )
Individual evidence
- ↑ PSI5: Specification