Synchronous Serial Interface (SSI)

The SSI module allows the use of a wide variety of feedback devices using the Synchronous Serial Interface (SSI) standard. Some of the transducers that are available with SSI are magnetostrictive displacement transducers (MDTs), absolute encoders, and laser measuring devices.

SSI has a number of advantages over other transducer interfaces: It offers higher noise immunity, gives absolute positions, and supports a wide variety of transducers. Also, many SSI devices offer high precision with resolutions to 0.5μm.


Current output up to ±200mA is available with the VC2100 or VC2124 converter option (see Motion Control Accessories).

SSI Device Manufacturers

Following is a partial list of manufacturers of transducers with SSI interfaces. See the datasheet for more information.