3. Installation
3-15
Festo P.BE-SPC11-SYS-ASI-EN en 0203NH
3.2.1 Pneumatic emergency stop circuit
In order to put th e system into a defined state in the event of
a fault, you will require a pneumatic emergency stop circuit.
From the types of circuits listed below, select the one which
best suits the design and operating characteristics of your
system.
S Drive pressureless during emergency stop.
S The moveable mass is clamped firmly during emergency
stop.
S The moveable mass moves at reduced speed into the left
or right-hand end position during emergency stop.
Please note
If the operating voltage supply for the SPC11 is switched
off, the proportional directional control valve type MPYE-...
will move to the mechanical mid-position. Due to the asym-
metrical voltage-pressure curve of the proportional direc-
tional control valve when the supply pressure is switched
on, the slide can mo ve slowly into one of the end positions.
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