Datasheet

8 sensing.honeywell.com
MICRO SWITCH Heavy-Duty Limit Switch, Stainless Steel (LS2 Series)
ELECTROMECHANICAL SWITCHES
Definitions below explain the meaning of
operating characteristics. Characteristics
shown in tables were chosen as most
significant. They are taken at normal
room temperature and humidity. These
may vary as temperature and humidity
conditions differ. Sketches show how
characteristics are measured for in-line
plunger actuation, rotary actuation, and
includes bar chart description.
Linear dimensions for in-line actuation
are from top of plunger to a reference
line, usually the center of the mounting
holes. Rotary actuated HDLS limit
switches have the characteristics in
degrees of angular rotation.
Differential Travel (D.T.) – Plunger
or actuator travel from point where
contacts ‘‘snap-over’’ to point where they
‘‘snapback.’’
Free Position (F.P.) – Position of switch
plunger or actuator when no external
force is applied (other than gravity).
Full Overtravel Force – Force required
to attain full overtravel of actuator.
Operating Position (O.P.) – Position of
switch plunger or actuator at which point
contacts snap from normal to operated
position. Note that in the case of flexible
or adjustable actuators, the operating
position is measured from the end of the
lever or its maximum length. Location of
operating position measurement shown
on mounting dimension drawings.
Operating Force (O.F.) – Amount
of force applied to switch plunger or
actuator to cause contact ‘‘snap-over.’’
Note in the case of adjustable actuators,
the force is measured from the maximum
length position of the lever.
Overtravel (O.T.) – Plunger or actuator
travel safely available beyond operating
position.
Pretravel (P.T.) – Distance or angle
traveled in moving plunger or actuator
from free position to operating position.
Release Force (R.F.) – Amount of force
still applied to switch plunger or actuator
at moment contacts snap from operated
position to unoperated position.
Total Travel (T.T.) – Distance from
actuator free position to overtravel limit
position.
NC
NO
NO
NC
Bar Chart Description (Inline and Rotary)
> Actuation
< Release
R.T.
O.T.
O.P.
T.T.
D.T.
F.P.
NC = Normally closed contact(s)
NO = Normally open contact (s)
contact closed
contact open
P.T.