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Ultra-compact Photoelectric Sensor EX-20 Ver.2

Specifications

Specifications

Type Thru-beam Retroreflective Diffuse reflective
Front sensing Side 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)
Dark-ON EX-21B
(-PN)		 EX-29B
(-PN)		 EX-22B
(-PN)
CE marking directive compliance EMC Directive, RoHS Directive
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 x 200 mm)
(7.874 x 7.874 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 translucent object
(Note 4, 6)		 Opaque,
translucent or
transparent
object
(Note 6)
Hysteresis - 15 % or less of operation distance [200 x 200 mm 7.874 x 7.874 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
Supply voltage 12 to 24 V DC ± 10 % Ripple P-P 10 % or less
Current consumption Emitter: 10 mA or less, Receiver: 10 mA or less 13 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: 2 V or less (at 50 mA sink current)
1 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: 2 V or less (at 50 mA source current)
1 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
Operation mode switch - Located on the receiver -
Pollution degree 3 (Industrial environment)
Protection IP67 (IEC)
Ambient temperature -25 to +55 ℃ -13 to +131 ℉
(No dew condensation or icing allowed),
Storage: -30 to +70 ℃ -22 to +158 ℉
Ambient humidity 35 to 85 % RH, Storage: 35 to 85 % RH
Ambient illuminance Incandescent light: 3,000 lx or less at the light-receiving face
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 double amplitude (20 G max.) in X, Y and Z directions for two hours each
Shock resistance 500 m/s2 acceleration (50 G approx.) in X, Y and Z directions 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
Material Enclosure: Polyarylate, Lens: Polyarylate
Cable 0.1 mm2 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 mm2, 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 (Reflector): 1 pc.
Adjusting screwdriver: 1 pc.		 Adjusting screwdriver:
1 pc.
Type Convergent reflective Narrow-view reflective
Diffused beam type Small spot beam type Long distance spot beam type
Front sensing Side sensing Side sensing
Model No.
(Note 2)		 Light-ON EX-24A(-PN) EX-26A(-PN) EX-28A(-PN)
Dark-ON EX-24B(-PN) EX-26B(-PN) EX-28B(-PN)
Sensing range 2 to 25 mm 0.079 to 0.984 in (Conv. point: 10 mm 0.394 in) with white non-glossy paper (50 x 50 mm) (1.969 x 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 x 50 mm 1.969 x 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 x 100 mm 3.937 x 3.937 in), spot diameter ø5 mm ø0.197 in with setting distance 80 mm 3.150 in
Sensing object 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 x 50 mm 1.969 x 1.969 in (EX-28□: 100 x 100 mm 3.937 x 3.937 in) (with white non-glossy paper)]
Repeatability
(perpendicular to sensing axis)		 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 13 mA or less 15 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: 2 V or less (at 50 mA sink current)
1 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: 2 V or less (at 50 mA source current)
1 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)
Stability indicator Green LED
(lights up under stable light received condition or stable dark condition)
Sensitivity adjuster - Continuously variable adjuster
Operation mode switch -
Pollution degree 3 (Industrial environment)
Protection IP67 (IEC)
Ambient temperature -25 to +55 ℃ -13 to +131 ℉
(No dew condensation or icing allowed),
Storage: -30 to +70 ℃ -22 to +158 ℉
Ambient humidity 35 to 85 % RH, Storage: 35 to 85 % RH
Ambient illuminance Incandescent light: 3,000 lx or less at the light-receiving face
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 double amplitude (20 G max.) in X, Y and Z directions for two hours each
Shock resistance 500 m/s2 acceleration (50 G approx.) in X, Y and Z directions three times each
Emitting element Red LED (modulated)
  Peak emission wavelength 680 nm 0.027 mil 650 nm 0.026 mil 650 nm 0.026 mil
Material Enclosure: Polyarylate, Lens: Polyarylate
Cable 0.1 mm2 3-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 mm2, or more, cable.
Weight Net weight: 20 g approx., Gross weight: 45 g approx.
Accessories - Adjusting screwdriver: 1 pc.

Notes:
1) Where measurement conditions have not been specified precisely, the conditions used were an ambient temperature of +23 ℃ +73.4 ℉.
2) Model Nos. having the suffix "-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 retroreflective type sensor are specified for the RF-200 reflector. Further, the sensing range is the possible setting range for the reflector. The sensor can detect an object less than 30 mm 1.181 in away. However, if the reflector 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 confirm detection with an actual sensor before use.

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