The S-Dias Safety Module SSI 021 from Sigmatek can safely evaluate two SSI absolute encoders. According to the manufacturer, the dual-channel design ensures the safe recording and processing of position values on the SSI interfaces in accordance with SIL 3 or SIL CL 3 in accordance with EN 62061 and PL e, Cat. 4 in accordance with EN ISO 13849. The connection of two SSI encoders to the common clock enables, among other things, the reading of several sensors, for example from position measuring systems, at a specific point in time. The clock frequency can be set using software so that the transmission can be adapted to the cable lengths. The number of data bits can also be configured via the software. The safety module can be used to implement safety functions for skew, speed, direction and ramps, for example.