Design and function
© Festo Didactic Conveyor 65
5.6.3 Emergency Stop System
The touch panel is provided with an Emergency Stop mushroom actuator. With a 5 pole cable, the
Emergency Stop mushroom actuator is connected to the power supply XZ1.
The voltage (24VDC) is supplied to the system with the clamp XZ1 from an external power supply unit. As a
permanent positive (24VB), this voltage is then lead into the touch panel with the M12 cable. In the touch
panel, the first NC contact of the Emergency Stop mushroom actuator connects the switched positive
(24VNA) with 24VB. That means, if you press the Emergency Stop mushroom actuator, the 24VNA will be
separated from 24VB as well as all other objects at clamp XZ1 supplied by 24VNA.
The second NC contact of the Emergency Stop mushroom actuator is used as a signal contact for the SPS
and is located on inlet 1.5.
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