Safety Relay 3SK1121-1AB40

SIRIUS 3SK1 Advanced Safety Relay - Configurable
The safety relays of the Advanced series comprise basic devices and input and output expansions. The Advanced devices can be connected by means of a 3ZY12 device connector. When configuring the system, it must be ensured that input expansions are always mounted on the left, and output expansions (3SK121) on the right of the basic unit. For control supply voltages of 110-240 Vac/dc, the Advanced series can be supplied with the necessary 24 Vdc voltage from the 3SK1230 power supply (which must be positioned on the extreme left in the system). The focus of the Advanced relay series is on: single devices that can be flexibly parameterized, expandability using 3ZY12 device connector on both input and output side and basic units with time-delayed enabling circuits / outputs.

• 4-way DIP switch for function setting (parameterization)
• Set / Reset button
• 4 LEDs for status and function display
• 2 sensor inputs (channels 1 and 2)
• 1 input (cascading circuit)
• 1 input (Start pushbutton circuit)
• NO contact/NC contact evaluation via external jumper
• Connection interface
• Removable terminals

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