Datasheet
FIBER
SENSORS
LASER
SENSORS
PHOTO-
ELECTRIC
SENSORS
MICRO
PHOTO-
ELECTRIC
SENSORS
AREA
SENSORS
SAFETY
COMPONENTS
PRESSURE
SENSORS
INDUCTIVE
PROXIMITY
SENSORS
PARTICULAR
USE
SENSORS
SENSOR
OPTIONS
WIRE-
SAVING
SYSTEMS
MEASURE-
MENT
SENSORS
STATIC
CONTROL
DEVICES
LASER
MARKERS
PHOTO-
ELECTRIC
SENSORS
Selection
Guide
Amplifier
Built-in
EX-10
CX-400
EX-20
EX-30
EX-40
EQ-30
EQ-500
MQ-W
RX-LS200
RX
CY
PX-2
RT-610
Amplifier-
separated
Power Supply
Built-in
NX5
VF
SU-7 / SH
SS-A5 / SH
Other
Products
EX-20
Amplifi er
Built-in
Ultra-compact Photoelectric Sensor EX-20 SERIES
274
SPECIFICATIONS
Notes: 1) Where measurement conditions have not been specifi ed precisely, the conditions used were an
ambient temperature of +23 °C
+73.4 °F.
2) Model Nos. having the suffi x “-PN” are PNP output type.
3)
Either Light-ON or Dark-ON can be selected by the operation mode switch (located on the receiver).
4) The sensing range and the sensing object of the retrorefl ective type sensor are specifi ed for the
RF-200 refl ector. Further, the sensing range is the possible setting range for the refl ector. The
sensor can detect an object less than 30 mm
1.181 in away. However, if the refl ector is set
100 mm
3.937 in or less away, the sensing object should be opaque.
5) In case of using this product at a sensing range of 50 mm
1.969 in or less, take care that the
sensitivity adjustment range becomes extremely narrow.
6) Make sure to confi rm detection with an actual sensor before use.
Sensor ReflectorReflector
Actual sensing range
of the sensor
Setting range
of the reflector
Reflector cannot
be placed
in this range
30 mm 1.181 in
200 mm 7.874 in
Type
Thru-beam Retrorefl ective
Diffuse refl ective
Convergent refl ective
Narrow-view refl ective
Diffused beam type
Small spot beam type
Long distance spot beam type
Front sensing Side sensing Side sensing Side sensing Front sensing Side sensing Side sensing
Model No.
(Note 2)
Light-ON EX-21A(-PN)
EX-23(-PN)
(Note 3)
EX-29A(-PN) EX-22A(-PN) EX-24A(-PN) EX-26A(-PN) EX-28A(-PN)
Item Dark-ON EX-21B(-PN) EX-29B(-PN) EX-22B(-PN) EX-24B(-PN) EX-26B(-PN) EX-28B(-PN)
Sensing range
1 m
3.281 ft
2 m
6.562 ft
30 to 200 mm
1.181 to 7.874 in
(Note 4)
5 to 160 mm 0.197
to 6.299 in
(Note 5)
with white non-glossy
paper (200 × 200 mm)
(7.874 × 7.874 in)
2 to 25 mm 0.079 to
0.984 in
(Conv. point: 10
mm
0.394 in) with white
non-glossy paper (50 × 50
mm)
(1.969 × 1.969 in)
6 to 14 mm 0.236 to 0.551 in
(Conv. point: 10 mm
0.394 in) with white
non-glossy paper (50 × 50 mm
1.969 ×
1.969 in
), spot diameter ø1 mm ø0.039 in
with setting distance 10 mm
0.394 in
45 to 115 mm 1.772 to 4.528 in
with white non-glossy paper (100
× 100 mm
3.937 × 3.937 in), spot
diameter ø5 mm
ø0.197 in with
setting distance 80 mm
3.150 in
Sensing object
Min. ø2.6 mm ø0.102 in
opaque object
Setting distance
between emitter and
receiver: 1 m
3.281 ft
Min. ø3 mm ø0.118 in
opaque object
Setting distance
between emitter and
receiver: 2 m
6.562 ft
ø15 mm ø0.591 in or
more opaque or tran
slucent object
(Note 4, 6)
Opaque,
translucent or
transparent
object
(Note 6)
Min. ø0.1 mm
ø0.004 in
copper wire
Setting distance:
10 mm
0.394 in
Min. ø0.1 mm
ø0.004 in
copper wire
Setting distance:
10 mm
0.394 in
Opaque, translucent or
transparent object (Note 6)
Min. ø1 mm ø0.039 in
copper wire at setting
distance 80 mm
3.150 in
Hysteresis
–
15 % or less of operation distance [50 × 50 mm 1.969 × 1.969 in (EX-22□: 200 × 200 mm
7.874 × 7.874 in, EX-28□: 100 × 100 mm 3.937 × 3.937 in) (with white non-glossy paper)]
Repeatability
(perpendicular to sensing axis)
0.05 mm
0.002 in or less
0.5 mm
0.020 in or less
0.3 mm
0.012 in or less
0.1 mm 0.004 in or less
(Setting distance: 10 mm 0.394 in)
0.05 mm 0.002 in or less
(Setting distance: 10 mm 0.394 in)
0.3 mm
0.012 in or less
Supply voltage 12 to 24 V DC ± 10 % Ripple P-P 10 % or less
Current consumption
Emitter: 10 mA or less, Receiver: 15 mA or less
20 mA or less
Output
<NPN output type>
NPN open-collector transistor
Maximum sink current: 50 mA
Applied voltage: 30 V DC or less (between output and 0 V)
Residual voltage: 1 V or less (at 50 mA sink current)
0.4 V or less (at 16 mA sink current)
•
•
•
<PNP output type>
PNP open-collector transistor
Maximum source current: 50 mA
Applied voltage: 30 V DC or less (between output and +V)
Residual voltage: 1 V or less (at 50 mA source current)
0.4 V or less (at 16 mA source current)
•
•
•
Utilization category DC-12 or DC-13
Short-circuit protection Incorporated
Response time 0.5 ms or less
Operation indicator
Orange LED (lights up when the output is ON) (thru-beam type: located on the receiver)
Stability indicator
Green LED (lights up under stable light received condition
or stable dark condition), located on the receiver
Green LED (lights up under stable light received condition or stable dark condition)
Sensitivity adjuster
–
Continuously variable adjuster,
located on the emitter
Continuously variable adjuster
–
Continuously variable adjuster
Operation mode switch
–
Located on the receiver
–
Environmental resistance
Pollution degree 3 (Industrial environment)
Protection IP67 (IEC) (Refer to p.984 for details of standards.)
Ambient temperature –25 to +55 °C
–13 to +131 °F (No dew condensation or icing allowed), Storage: –30 to +70 °C –22 to +158 °F
Ambient humidity 35 to 85 % RH, Storage: 35 to 85 % RH
Ambient illuminance Incandescent light: 3,000 ℓx at the light-receiving face
EMC EN 60947-5-2
Voltage withstandability
1,000 V AC for one min. between all supply terminals connected together and enclosure
Insulation resistance 20 MΩ, or more, with 250 V DC megger between all supply terminals connected together and enclosure
Vibration resistance 10 to 500 Hz frequency, 3 mm
0.118 in amplitude (20 G max.) in X, Y and Z directions for two hours each
Shock resistance 500 m/s
2
acceleration (50 G approx.) in X, Y and Z directions for three times each
Emitting element Red LED (modulated)
Peak emission wavelength 640 nm 0.025 mil 650 nm 0.026 mil 680 nm 0.027 mil 680 nm 0.027 mil 680 nm 0.027 mil 650 nm 0.026 mil 650 nm 0.026 mil
Material Enclosure: Polyethylene terephthalate, Lens: Polyalylate
Cable 0.1 mm
2
3-core (thru-beam type sensor emitter: 2-core) cabtyre cable, 2 m 6.562 ft long
Cable extension Extension up to total 50 m
164.042 ft is possible with 0.3 mm
2
, or more, cable (thru-beam type: both emitter and receiver).
Weight
Net weight (each emitter and receiver): 20 g approx.
Gross weight: 60 g approx.
Net weight: 20 g approx., Gross weight: 45 g approx.
Accessories
–
Adjusting screwdriver:
1 pc.
RF-200 (Refl ector): 1 pc.
Adjusting screwdriver: 1 pc.
Adjusting screwdriver:
1 pc.
–
Adjusting screwdriver: 1 pc.