SIRIUS, CENTRAL UNIT 3RK3 ADVANCED FOR MODULAR SAFETY SYSTEM 3RK3 4/8 F-DI, 1F-RO, 1 F-DO, 24VDC MONITORING OF ASI SLAVES, CONTROL OF 12 SAFE OUTPUTS ON AS-I BUS PARAMETERIZABLE VIA SW MSS ES WIDTH 45MM SCREW TERMINAL UP TO SIL3 (IEC 61508) UP TO PERFORMANCE LEVEL E (ISO 13849-1) 9 EXPANSION MODULES CONNECTABLE