SIRIUS safety relays with relay enable circuits featuring positively-driven NO and NC contacts in pairs make a real difference to safety. If one of the contacts welds, then the other contact is used to shut down the circuit. A positively-driven feedback signal contact (NC contact) detects the fault of the defective NO contact. Expansion units are available to increase the number of enable circuits. The 3TK2834 press control unit as safety-relevant evaluation unit is used for 2-hand operator consoles in press control systems.
The series of safety relays with relay enable circuits has been expanded with the new 3TK2826. The DIP switches on the front facilitate configuration of up to 8 parameters. LEDs next to the switches clearly indicate the set state at all times.