Sirius Safety Switch Device Basic Unit Advanced Series with a time delay of 0.5-30 seconds. Relay release circuits: 2 without delay, 2 with delay. Us = 24 V DC, screw connection. The Sirius 3SK1 safety switch device is designed for autonomous safety applications. The Advanced 3SK112 basic units offer versatile applications thanks to their multifunctionality and flexible expansion options. They create an innovative system landscape that can implement complex safety functions with a variety of sensors and outputs. With device connectors, the number of inputs and safe outputs can be reliably and easily expanded without wiring effort between devices. Drives up to 3 kW can be directly integrated into the 3SK system using the fail-safe motor starters Sirius 3SK11 via device connectors. All components have worldwide approvals, making them ideal for global use and export. The devices are available with relay or semiconductor outputs, either without delay or with delay, each with various time ranges, and consistently with screw or spring-loaded connections (Push-In). Extensive accessories such as sealing covers, mounting brackets for wall installation, and coding pins facilitate handling. Input and output expansions as well as a separate power supply can be used via device connectors without additional wiring effort. The 3SK safety switch devices replace the proven 3TK28 series. Safety is a Sirius business.