EE-SPW321(-A)/421(-A)
Compact, Thin-profile
Photomicrosensor with Special
Amplifier
H
Slim amplifier with NPN output for easy
handling and mounting
H
Operation indicator allows monitoring from
the amplifier housing or sensor head
H
Simple wiring with a 3-conductor cable
H
Light modulation effectively reduces
external light interference
Ordering Information
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PHOTOMICROSENSORS
Sensing method
Sensing distance
Sensing object
Output configuration Part number
Slot
30 cm
Opaque: 2 mm dia. min.
Dark-ON
EE-SPW321
EE-SPW321-A
Light-ON
EE-SPW421
EE-SPW421-A
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SENSING DISTANCE WITH APERTURE*
Size of aperture
Sensing distance
Sensing object
0.5 x 3 mm
10 cm
Opaque: 0.5 mm dia. min.
1 x 3 mm
20 cm
Opaque: 1 mm dia. min.
*Four apertures comprised of 2 different widths are provided with sensor unit.
Specifications
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RATINGS
Supply voltage
12 VDC -10% to 24 VDC +10%
Current consumption
30 mA max.
Sensing distance*
30 cm
Standard reference object**
Opaque: 2 mm dia. min.
Directional angle
10 to 40
Response time
1 ms max. for both detection and reset
Control output
Load current: 100 mA (residual voltage: 1 V max.)
Light source
GaAs infrared LED (pulse modulated) with a peak wavelength of 940 nm
Operation indicator
Light-ON (red LEDs on sensor and amplifier)
Connecting method
Pre--wired with 2 m cable
*Refer to Receiver Output vs. Sensing Distance Characteristics in Engineering Data.
**An object as minute as 0.5 mm dia. can be sensed when an aperture is attached to the sensor.
EE-SPW321(-A)/421(-A)
EE-SPW321(-A)/421(-A)
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Aperture Size
Aperture
Size L
Size H
Slit A
0.5 mm
3 mm
Slit B
1 mm
3 mm
Slit C
3 mm
0.5 mm
Slit D
3 mm
1 mm
Precautions
Refer to the Technical Information section for general
precautions.
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OPTICAL AXIS ADJUSTMENT
Move the light source head and the receiver vertically and
horizontally to obtain a proper angular range in which the
operation indicator turns ON. Then fix both of the heads securely.
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MOUNTING
The main body and both heads must be fitted to a warping-free
mount using the attached screws with a torque of 5.5 kg
cm or
below.
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APERTURES
Four kinds of reticles are included with the sensor as follows:
(A) 0.5 mm by 3 mm, horizontal slit
(B) 1 mm by 3 mm, horizontal slit
(C) 3 mm by 0.5 mm, vertical slit
(D) 3 mm by 1 mm, vertical slit
Use the reticles when the detected surface of object is smaller
than 2 mm in width, or when mutual interference must be
reduced. Select a pair of reticles the same size according to the
above conditions.
Attach the selected reticles on the lens of the light source head
and receiver head respectively.
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CONNECTIONS
Routing the wire of the photomicrosensor in close proximity to
high potential power lines may result in malfunction or damage
because of inductive effects. Be sure to route the sensor wires
separate from the power lines or through a separate conduit.
For extending the sensor wires, use a cable greater than AWG
22 in diameter and shorter than 100 m. As impedance of the
extended cable increases, the supply voltage applied to the
sensor terminal will decrease, and the low level output voltage at
the cable end will increase. For this reason, consider the voltage
fluctuation when extending the sensor cable.
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POWER SOURCE
When using a commercially available switching regulator, be sure
to ground the FG (Frame Ground) and G (Ground) terminals;
otherwise, faulty operation of the sensor may be caused by the
switching noise.
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EFFECT OF ELECTRICAL NOISE
The sensor output may be affected by noise from switching
regulators or the other instruments. In this case, place a 0.47
F
capacitor between the 0 V terminal and the frame.
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MATERIALS OF SENSOR HOUSING
The main body and the heads are made of ABS resin. The lens
sections of the both heads are made of acrylic resin. They may
be dissolved by organic solvent and strong acidic substances.
Excessive forces (hitting by hammer, or the like) should not be
applied to the product because they may damage its
water-resistance ability.
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WATER RESISTANCE
The photomicrosensor does not have a complete water-resistant
construction. The water-resistant level of the product is IP64
(IEC529). Therefore, do not use or store it in water or in rainfall.
Cat. No. GC A PMS-1 09/02 Specifications subj ect to c hange without notice. Printed i n U.S.A.
OMRON ELECTRONICS LLC
One East Commerce Drive
Schaumburg, IL 60173
NOTE: DIMENSIONS SHOWN ARE IN MILLIMETERS. To convert millimeters to inches divide by 25.4.
1-800-55-OMRON
OMRON CANADA, INC.
885 Milner Avenue
416-286-6465
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OMRON ON--LINE
Global -- http://www.omron.com
USA -- http://www.omron.com/oei
Canada -- http://www.omron.com/oci
Toronto, Ontario M1B 5V8
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