User Manual

2
Mount the sensor on a mounting plate 3mm or less thick.
1 Use the enclosed nut and toothed lock washer for mounting. The
tightening torque should be 0.6N·m or less. (For EX-32: 1N·m or less.)
2 When tightening the nut, hold the sensor with your hand or an end
wrench, for example. Do not tighten the sensor itself!
NPN output type
 For the thru-beam type, the receiver incorporates the output.
PNP output type
 For the thru-beam type, the receiver incorporates the output.
 The slit mask is only available for the thru-beam type sensor.
The optional slit mask (OS-EX30-1) helps the sensor detect small objects.
The accuracy of the position being sensed is also increased. However, the
sensing range is reduced.
Mounting method
 The tightening torque should be 0.6N·m or less.
1 Insert the sensor into the mounting plate.
2 Fit the washer and spacers enclosed with the slit mask.
 The number of spacers required depends on the thickness of the
mounting plate.
3 Mount the slit mask. Make sure that the tightening torque is 0.6N·m or
less.
 For thru-beam type sensors, the P suffix engraved on the sensor
denotes the emitter, e.g.. EX-P; D denotes the receiver, e.g.
EX-D-.
3 EX-33
In the “dark” condition, place an object to be
sensed and turn the sensitivity adjuster clock-
wise until the sensor output just turns ON.
Then turn the adjuster counterclockwise to
find point B where the sensor just turns OFF.
EX-32
In the “dark” condition, turn the sensitivity
adjuster clockwise until the sensor output
turns ON.
*1
Turn it back slowly to confirm point B, where
the sensor output just turns OFF.
*1
If the sensor output does not turn ON even
when the sensitivity adjuster is turned fully
clockwise, point B is the position at MAX.
4 The position exactly between points A and B
is the optimum sensing position.
*1
Remember, this only applies if the operation mode is Light-ON.
4 MOUNTING
5 I/O CIRCUIT DIAGRAMS
Step
Sensitivity
adjuster
Description
MAX
MAX
3mm
+
-
±10%
Sensor circuit
Internal circuit
Users' circuit
(Blue) 0V
(Black) Output (Note)
50mA max.
Load
Color code
(Brown) +V
12 to 24V DC
+
-
±10%
Color code
(Brown) +V
12 to 24V DC
50mA max.
(Black) Output (Note)
(Blue) 0V
Sensor circuit
Internal circuit
Users' circuit
Load
6 SLIT MASK
Mounting plate thickness No. of spacers
3mm 0
2mm 1
1mm 2
7 MODELS, ORDERING INFORMATION
Mounting plate
Slit mask
Spacer
Washer
Sensor
EX-3
-
1: Thru-beam type
2: Diffuse reflective type
3: Thru-beam type / Operation mode type
Nil: NPN output type
PN: PNP output type
Nil: operation mode type
(Only EX-33□)
A: Light-ON type
B: Dark-ON type