C Pre-travel (average travel):
distance between the free position and
the operating position PA.
PR Release position:
position the itch ctu ato when the
contacts return their initial free position.
PP Positive opening position:
position the switch actuator from which
positive opening ensured.Limit Switches Plastic Metal Casing
Travel and Operation Diagrams
PO Free position:
position the switch actuator when exter
nal force exerted it.
C4 Release travel (average travel):
distance between the release position PRand
the free position PO.
C3 iffe tia tra 1-C (average
travel):
travel difference the switch actuator between
the operating position PAand the release posi
tion PR.).
PA perating position:
position the switch actuator, under the effect
of force F1, when the contacts leave their initial
free position. travel position:
maximum acceptable travel position the
switch actuator under the effect force F1.
L Max. travel position L. travel position L. travel (maximum travel):
distance between the free position POand the
max.
C2 ver-travel (average travel):
distance between the operating position PAand
the max.
CL ax.
ikllll
23
1SBC141157C0202
.
Note: for slow action contacts, 1-1 pre-travel contact 21-22, 1-2 pre-travel contact 13-14.C.
CP ositive opening travel:
minimum travel the switch actuator, from the
free position, ensure positive opening opera
tion the normally closed contact (N
