LSC5A datasheet(10/38 Pages) HONEYWELL

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MICRO SWITCH Heavy-Duty Limit Switch, HDLS 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 and rotary actuation.

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.

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

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