The open source BiSS interface (bidirectional/serial/synchronous) is based on a protocol which implements a real time interface.
It enables a secure serial digital communication between controller, sensor and actuator.
It is used in industrial applications which require transfer rates, safety, flexibility and a minimized implementation effort.
The BiSS interface has roots in SSI and a simplified INTERBUS.
The proprietary standards, Hiperface and EnDat are competing solutions.