4

Miniature Photoelectric Sensors

Operation

Sensitivity adjustment

E3H2-T4

The emitter of the E3H2-T4 allows an adjustment of the emitted

amount of light by turning the potentiometer. Turn the potentiom-

eter clockwise for increasing the amount of emitted light and

counter-clockwise for decreasing the amount of emitted light.

E3H2-R2

a) standard mode

To teach the retro-reflective model E3H2-R, place the sensor

with the lens facing the reflector. Press the teach button for 2-

5 seconds. For remote teach connect the white wire (Pin 2) for

2-5 seconds to common (-).

The threshold is now set to 50% of the received light level.

b) high sensitivity mode (e.g. for semi-transparent models)

To teach the retro-reflective model E3H2-R in high sensitivity

mode, place the sensor with the lens facing the reflector.

Press the teach button for >8 seconds. For remote teach con-

nect the white wire (Pin 2) for >8 seconds to common (-).

The threshold is now set just below the received light level.

If the teaching was successful the LED should no longer be flash-

ing and a state change occurs when the light is interrupted.

E3H2-DS30

a) standard mode

To teach the diffuse-reflective model E3H2-DS30, place the

object in front of the sensor at the required sensing distance.

Press the teach button for 2-5 seconds. For remote teach

connect the white wire (Pin 2) for 2-5 seconds to common (-).

The threshold is now set to 50% of the received light level.

When the object is removed, a state change at the sensor

should occur. If this is not the case the high sensitivity mode

may be required.

b) high sensitivity mode

To teach the diffuse-reflective model E3H2-DS30 in high sen-

sitivity mode, place the object in front of the sensor at the

required sensing distance. Press the teach button for

>8 seconds. For remote teach connect the white wire (Pin 2)

for >8 seconds to common (-).

The threshold is now set just below the received light level.

When the object is removed, a state change at the sensor

should occur and the LED should no longer be flashing.

For E3H2-T2 and E3H2-DS10 the sensitivity setting is fixed.

Operation mode selection

The light-on / dark-on operation mode can be selected by wire

(except for E3H2-T2). The white wire (Pin 2) can be connected to

plus (+), common (-) or left open (not connected) for the default

setting.

a) E3H2-T4 Receiver

Default setting (wire left open):DARK-ON

Connected to plus (+):

LIGHT-ON

Connected to common (-):

DARK-ON

b) E3H2-R2

Default setting (wire left open):DARK-ON

Connected to plus (+):

LIGHT-ON

Connected to common (-):

TEACH*1

c) E3H2-DS30

Default setting (wire left open):LIGHT-ON

Connected to plus (+):

DARK-ON

Connected to common (-):

TEACH*1

d) E3H2-DS10

Default setting (wire left open):LIGHT-ON

Connected to plus (+):

DARK-ON

Connected to common (-):

LIGHT-ON

For E3H2-T2 the operation mode is fixed and models with light-

on and dark-on operation are available.

*1

In case the remote teach operation is required when the white wire is con-

nected to plus (+), add a 2.2 k

 resistor between the white wire and (+)

to avoid a short circuit.