SIRIUS 3SK1 Standard Safety Relay The safety relays of the Standard series can be configured as stand alone devices or as an expandable solution with conventional wiring technology. The focus of the Standard series is on: single devices for simple safety applications, output side expansion by means of expansion units and external wiring. No expansion is possible on the input side. Applications Emergency Off / Emergency Stop monitoring Monitoring of protective doors with electromechanical position switches, solid state position switches, or solenoid switches Monitoring of contact free protection equipment, e.g. light arrays / light barriers, or laser scanners 3SK1111 Standard basic unit instantaneous (with relay outputs) The SIRIUS 3SK1111 is a two-channel safety relay for EMERGENCY OFF and EMERGENCY STOP equipment in accordance with EN 60204-1. The unit is equipped with a positively driven relay and monitors itself during every ON/OFF cycle. The safety relay has three enabling circuits (safety related circuits) as NO circuits and a signalling circuit (non-safety related circuit, NC contact). On the front of the 3SK1111 basic unit there is a slide switch for function setting and two LEDs for displaying the operating states. 2 sensor inputs (channels 1 and 2) 1 input for feedback circuit and START button 3 enabling circuits (safety related circuits, NO contacts) 1 signalling circuit (non-safety related circuit, NC contact) 2 LEDs for displaying the operating states Slide switch for function setting Single channel or two channel connection Cross circuit detection between sensor channels 1 and 2 Enclosure width 22.5 mm Removable terminals 3SK1112 Standard basic unit instantaneous (with solid-state outputs) The SIRIUS 3SK1112 safety relay has two safety related solid state sa...