Synchronous Serial Interface (SSI)
The synchronous serial interface is a digital interface for absolute position and rotary measuring systems. It enables position and angular information to be transmitted digitally, absolutely and without bus overhead. As a result, it is especially well-suited for applications in which reliability and signal robustness are required in an industrial environment.
Transmission is synchronous to the request of the controller, and one bit of the position value to be output is transferred with each clock pulse.
The clock/data signals are transferred differentially via an RS 422 interface. Data formats are binary or Gray-encoded with a 24 or 25-bit position resolution.
Sensors with SSI interface: