Datasheet

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 kΩ resistor between the white wire and (+)
to avoid a short circuit.