22
Pneumatic set-up (continued)
Operation sequence (circuit 4)
Operation
sequence
Stylus Solenoid
valve
End of sequence trigger Monitor Variable to
set
1 Cover extend Protected 0 Pressure switch activation Pressure
switch
Time
2 Cover retract Accessible 1 Retract sensor Retract
sensor
1 Cover extend Protected 0 Pressure switch activation Pressure
switch
Time
Bulkhead
V1
APCS with no “air bleed” (circuit 4)