7

E3JK

Operation

Adjustment

Precautions

Design

Power Reset Time

The Sensor is ready to detect an object within 200 ms after it

is turned ON. If Sensor and load are connected to separate

power supplies, ensure to turn ON the Sensor first.

Wiring Considerations

Connection/Wiring

If the DC transistor output type is used, the sum of load cur-

rents of L-ON output (NO) and D-ON output (NC) should be

within 100 mA. If the sum of load currents exceeds 100 mA,

the load short-circuit protection may be activated. (The load

short-circuit protection is reset by turning OFF the power of

the photoelectric sensor.)

Miscellaneous

Ambient Conditions (Installation Area)

The E3JK will malfunction if installed in the following places.

• Places where the E3JK is exposed to a dusty environment.

• Places where corrosive gases are produced.

• Places where the E3JK is directly exposed to water, oil, or

chemicals.

Item

Through-beam

Retroreflective Models

Diffuse-reflective

Model

E3JK

Swing the receiver and emitter ver-

tically and/or horizontally and set

the adjuster in the center of the

range where the indicator of the re-

ceiver turns ON.

Like the through-beam model, ad-

just the reflector and emitter/re-

ceiver. Since the directional angle

of the emitter/receiver is 1 to 5°, ad-

just the emitter/receiver especially

carefully.

(1) If you have a sensing object as shown in the figure, turn the sensitivity

adjuster clockwise (increase the sensitivity) until the indicator is turned

ON, and define this adjuster position as (A).

(2) Remove the sensing object, turn the sensitivity adjuster clockwise until

the indicator is turned ON by a background object, and define this posi-

tion as (B).

(3) Turn the sensitivity adjuster counterclockwise (decrease the sensitivity)

from (B) until the indicator is turned OFF, and define this position as (C).

(4) The position in the middle of (A) and (C) is the optimum position. If the

indicator is not turned ON by the background object at the maximum

sensitivity, set the adjuster in the middle of (A) and maximum sensitivity.

The sensitivity adjuster may be damaged if an excessive force is applied.

Correct Use

With sensing object

Without sensing object

Operation

Sensitivity

MIN

MAX

Reset

Operation

(C)

(C)

(A)

(A)

Setting

(B)

Sensitivity

MIN

MAX

(A)

Sensitivity

MIN

MAX

E3JK

Emitter

Receiver

Emitter

Receiver