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Verfügbare Sprachen
Verfügbare Sprachen
Photoelectric Sensors
Laser retroreflective Sensor BOS 21M-..-LR10-..
No. 831 770 E • Edition 0503
Laser retroreflective sensor
BOS 21M-PA-LR10-S4 (PNP)
BOS 21M-NA-LR10-S4 (NPN)
BOS 21M-PA-LR10-S4S (PNP)
BOS 21M-NA-LR10-S4S (NPN)
Safety Advisory
Laser protection regulations: The transmitter
and the laser light barrier comply with laser
protection class II in accordance with DIN EN
60825-1/94. Therefore no additional protective
measures are necessary for operation.
These Photoelectric Sensors are not suited for
safety related applications.
The CE-Marking means that our products
conform to the requirements of the EC Guidelines
89/336/EWG (EMC) and the EMC Statute.
Testing in our EMC Laboratory, which is accredited by
DATech for Testing of Electromagnetic Compatibility, has
shown that these Balluff products satisfy the EMC
requirements of the following Generic Standards:
− EN 50 081-2 (Emission) and
− EN 50 082-2 (Noise Immunity)
Display and operating elements
Yellow LED:
Output function indicator: The yellow LED ON indicates
that the output is active.
Green LED:
Power on indicator: The green LED indicates that the
sensor is operating and the laser is active.
Potentiometer
Used to set the receiver sensitivity and range.
Caution! Do not turn the potentiometer beyond the 270°
mechanical stop.
1 Yellow LED: Output function
indicator
2 Green LED: Power on indicator
3 Potentiometer: Sensitivity setting
Fig. 1: Controls
Connections
1 10...30 V DC
2 Output
3 0 V
4 Output
Fig. 2: M12 connector
3
Installation
There are three ways to attach the sensor:
1. Using two screws (M4) and washers through the
housing mounting holes.
2. Using a mounting bracket (available separately).
3. Using special clamps (available separately) and the
dovetail housing profile.
The operating distance is measured from the front surface
of the sensor optics.
The M12 connector can be oriented at four different
ratchet positions of 0°, 90°, 180° or 270°.
Fig. 3: Dimensions
Settings
Standard detection
1. Position the sensor and reflector opposite each other at
the desired distance.
2. Turn the sensitivity potentiometer to maximum (greatest
range).
3. Determine the on- and off switch point of the output
(yellow LED): Move the sensor in all directions so that
the yellow LED comes on and goes out again.
4. Mount the sensor in the middle of the points defined.
Optimum operation is obtained when the green LED is
on to indicate reliable function.
Fine detection in order to detect very small targets
1. First perform the standard setting (see above).
2. Then turn the sensitivity potentiometer counterclock-
wise until the yellow LED turns on. The reflector will no
longer be detected.
3. Turn slowly the potentiometer again clockwise until the
yellow LED turns OFF. The reflector will be detected
again. Now even very small objects can be detected.
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