S-DIAS Safety SSI Absolute Value Encoder Article Number and Miscellaneous Article number Dimensions Standard The S-DIAS Safety SSI absolute value encoder module SSI 021 provides the values of two absolute value encoders, the Safety CPU as well as the non-Safe CPU (standard PLC). Since hardware version 2.0 rotary encoders are supported. The 2-channel Safety function is implemented by processing the position values in the so-called Safety core (two micro controllers with cross communication). The safety-related component of the module meets the requirements for SIL3 in accordance with EN / IEC 62061 and PL e, cat. 4 in accordance with EN ISO 13849-1/-2 (with two-channel use). CE, CULUS, TÜV Austria EG type-tested Environmental Conditions Storage temperature Environmental temperature -20 ... +85 °C 0 ... +55 °C 0 … +60 °C starting with HW version 3.10 Humidity Installation altitude above sea level 0-95 %, non-condensing 0-2000 m without derating > 2000 m with derating of the maximum environmental temperature by 0.5 °C per 100 m Operating conditions EMC resistance SSI Encoder Specifications Encoder Pollution degree 2 in accordance with 61000-6-7:2015 (Generic standards - Immunity requirements for equipment intended to perform functions in safety-related systems (functional safety) at industrial locations) in accordance with EN 61000-6-2:2007 (industrial area) (increased requirements in accordance with IEC 62061) in accordance with EN 61000-6-4:2007 (industrial area) Vibration resistance absolute encoder with RS422 interface Shock resistance Data transfer speed Protection type Encoder resolution Coding Encoder power supply binary/gray +24 V supply, maximum 300 mA internal voltage monitor +24 V (+20 %/-15 %) Electrical Requirements Voltage supply from Safety bus Current consumption on the Safety bus (+12 V supply) Voltage supply from S-DIAS bus Current consumption on the S-DIAS bus (+24 V supply)