The safety foot pedal FE-FS2-SU1ASDU1/SU1ASDU1-U use safety switches.
The two foot pedals have 3 positions, with a pressure point, to control dangerous movements (for instance get down of a press brake ect ). Each pedal has 2 working contacts ( 1NC+1NO) to drive the movement and one safety switch (1 positive opening NC contact and 1 NO contact) to stop the movement.
Pressing the foot pedal, till the pressure point, allows the changeover of the 2 working contacts. Once the pressure point is got over, the 2 working contacts return to their first position and the positive opening safety contact is activated in order to initiate immediately the dangerous movement. Thus a redundant information for the safety circuit is available. A restart of the machine is only possible after releasing the foot switch.