212

Sealed Snap Action Switch

D2VW

Precautions

Be sure to read the precautions and information common to all Snap Action and Detection Switches, contained in the Technical User’s Guide,

“Snap Action Switches, Technical Information” for correct use.

■ Correct Use

Operations

Make sure that the switching object is perfectly separated from the

actuator when the switch is not operated and the actuator is pressed

appropriately by the switching object when the switch is operated.

The switch should be set so that its stroke will be within the rated OT

when the switch is operated.

With the pin plunger models, set the switch so that the plunger can

be actuated from directly above. Since the plunger is covered with a

rubber cap, applying a force from lateral directions may cause

damage to the plunger or reduction in the sealing capability.

Handling

Handle the switch carefully so as not to break the sealing rubber of

the plunger.

Using Microloads

Using a model for ordinary loads to switch microloads may result in

faulty operation. Instead, use the models that are designed for

microloads and that operate in the following range;

However, even when using microload models within the operating

range shown above, if inrush current or inductive voltage spikes

occur when the contact is opened or closed, then contact wear may

increase and so decrease the service life. Therefore, insert a contact

protection circuit where necessary.

■ Cautions

Degree of Protection

The D2VW was tested under water and passed the following water-

tightness test, which however, does not mean that the D2VW can be

used in the water.

JIS C0929 (rules for testing the watertightness of electrical devices

and materials), class 7 (watertightness test). Refer to the following

illustration for the test method at OMRON.

Note: The object to be tested is left in the water for 30 minutes on con-

dition that the distance between the surface of the water and

the top of the object be 15 cm minimum and the distance be-

tween the surface of the water and the bottom of the object be

1 m minimum.

Protection Against Chemicals

Prevent the switch from coming into contact with oil and chemicals.

Otherwise, damage to or deterioration of the switch materials may

occur.

Correct

Incorrect

Incorrect

Operating range

for micro load

models D2VW-01

Operating

range for

general-load

models

D2VW-05

Current (mA)

Inoperable

range

30

24

12

5

0

1

10

100

1,000

0.16mA

100mA

100mA 160mA

26mA

1mA