travel position:
maximum acceptable travel position the
switch actuator under the effect force
F1.
CL Max.C. travel position L. travel position L.).
C CZ> °
1n o
yO extraction
D iagram non-overlapping slow
action contacts:
Key extraction
Key insertion
C: travel
3SBC343 357C0202
.Safety Limit Switches
Travel and Operating diagrams
PO Free position:
position the switch actuator when no
external force exerted it.
C1 Pre-travel (average travel):
distance between the free position and
the operating position PA.
CP Positive opening travel:
minimum travel the switch actuator, from
the free position, ensure positive opening
operation the normally closed contact
(N.
PA perating position:
position the switch actuator, under the
effect force F1, when the contacts leave
their initial free position.
C2 ver-travel (average travel):
distance between the operating position PA
and the max. travel axim travel):
distance between the free position and
the max.
PP Positive opening position:
position the switch actuator from which
positive opening ensured.
Note: 1-1 pre-travel contact 21-22,
C 1-2 pre-travel contact 13-14.
L Max
