1. Summary of components
1-34
Festo P .BE-MPA-EN en 1108e
1.5.1 Manual override (MO)
The manual override (MO) enables the valve to be actuated
when not electrically activated or energised. You only need to
switch on the compressed air supply.
Y ou should use the manual o verride mainly when
commissioning the pneumatic system in order to check the
function and operation of the valve or the valve-actuator
combination.
Non-detenting actuation The valve is activated by pushing the manual override.
After the MO is released, the valve automatically switches by
spring force back into the neutral position.
Detenting actuation The switching position can be engaged by turning the
manual override cloc kwise. The manual override remains
actuated until it is reset by hand.
Operation of the manual override is described in Chapter 4.3.
The basic logic functions of the manual override can be
changed by mounting a corresponding MO-cover cap:
Cover cap, non-detenting This cover cap prevents engaging of the MO. The manual
override can then only be actuated in a non-detenting way.
Cover cap, concealed This cover cap completely covers the MO, which is thus
secured against undesired actuation.
Mounting of the MO cover caps is described in Chapter 4.4.
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