Delta CS64A User Manual
CS64A
Color Sensors
010627a
(Address updated)
Contents
1. Specifications ............................................................................... 4
2. Introduction ................................................................................. 5
3. Mounting the CS64A................................................................... 7
4. Wiring the CS64A ..................................................................... 10
5. Adjustment................................................................................. 11
6. Sample Quick Test..................................................................... 12
7. Threshold Setting ...................................................................... 13
8. Characteristics ........................................................................... 13
1.1 Ordering Information................................................................. 4
2.1 Primary Features........................................................................ 6
3.1 Moving Line Applications......................................................... 8
3.2 Fixed Applications..................................................................... 8
8.1 Temperature............................................................................. 13
8.2 Edge Effects............................................................................. 14
8.3 Angle of CS64A to Material.................................................... 14
8.4 Distance Performance.............................................................. 14
8.5 General Information ................................................................ 14
9. Recalibration.............................................................................. 15
10. Maintenance............................................................................... 15
11. Frequently Asked Questions..................................................... 16
12. Troubleshooting......................................................................... 20
13. Support....................................................................................... 20
14. Repairs........................................................................................ 20
15. Warranty.................................................................................... 21
Although great effort has been taken to ensure the accuracy of the information in
this document, Delta Computer Systems, Inc. cannot accept responsibility for
problems resulting from errors or omissions in this document. The information
in this document is subject to change without notice.
Neither Delta Computer Systems, Inc. nor anyone else involved in the creation,
production, delivery, or support of this product shall be liable for any direct,
indirect, or consequential injuries or damages arising out of the use, the results of
use, or inability to use this product.
Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001 Delta Computer Systems, Inc.
Printed in USA
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3
1. Specifications
Model
Sensor-to-Object
Standoff Distance
Sensor-to-Object
Sensing Range
Sensing Area
Response Time
Output Update Rate
Analog Outputs
Color 1
Color 2
Color 3
Color 4
Calibration
At Standoff
Distance
Ratio Variation with
Sensing Distance
Temperature
Stability
Supply Voltage
Current
Consumption
Enclosure
Environment
CS64A-00
1.75 to 2.0” (4550mm) optimum
1.25” (32mm): 1.25 to
2.5” sensor-to-object
0.35” (9mm) square @
1.75” (45mm)
CS64A-02
4.75 to 5.0” (120125mm) optimum
1.25” (32mm): 4.25 to
5.0 sensor-to-object
0.7” (18mm) square @
4.75” (120mm)
CS64A-04-BNR
3.75 to 4.0” (95-100mm)
optimum
2.75” (70mm): 3.0 to
5.75 sensor-to-object
0.48” (12mm) square @
3.75” (95mm)
62us to read all 4 colors 47us to read all 3 colors
< 1 millisecond
Four, 0 to 10V at 5mA max Three, 0-10V, 5mA max
470nm Blue 470nm Blue
880nm Near-Infrared 880nm Near-Infrared
660nm Red 660nm Red
570nm Green N/A
9.5V and 100% ratios (Red/NIR, Blue/NIR, and
Green/NIR) with >99% diffuse reflection
9.5V and 100% ratios
(Red/NIR, Blue/NIR)
1.75” (45mm) 4.75” (120mm) 3.75” (95mm)
0.6% max per 0.25” (6mm) change in sensor-to-object distance (<2% max
over sensing range)
Ratios 0.1%/C typical
+24VDC ±5%
100mA maximum
Dust tight; 6.0 x 5.3 x 1.3” (153 x 135 x 33mm) excluding strain relief;1.25
lb (2.75 kg)
+10 to +40C operating; -25 to +85C storage; 0 to 90% humidity, noncondensing
1.1 Ordering Information
CS64A-00 1.75 to 2.0 inch (45 to 50mm) nominal standoff distance
CS64A-02 4.75 to 5.0 inch (120 to 125mm) nominal standoff distance
CS64A-04-BNR 3.00 to 5.75 inch (75 to 145mm) working distance, Blue, NIR, and Red
Other color sensors are available with standoff distances to 6", update rates to 50
microseconds as well as other color combinations and options. Contact Delta or your
local Delta color sensor distributor for more information, or visit our web page at
www.deltacompsys.com.
6/27/2001 DELTA Computer Systems, Inc. (360) 254-8688
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Introduction
The CS64A color sensor contains a light generation system to illuminate the object to be
sensed, and a light receiving system to read the diffuse reflected light from the object.
The light generation system consists of four sets of light emitting diode (LED) light
sources—a total of 28 LEDs. The CS64A determines color by turning on just one set of
LEDs (one color) at a time and analyzing the light captured by it’s precision silicon
photodiode.
The CS64A color sensor reads four different wavelengths--Blue, Near-infrared (NIR),
Red, and Green. Reflected energy in each of the color ranges appears as a 0-10V signal
on the corresponding four analog outputs, making the CS64A compatible with any PLC,
PC, or system having 0-10V analog inputs.
Using the ratios of Red/NIR, Blue/NIR and Green/NIR, it is possible to distinguish
between a wide range of colors. Very similar colors typically have a 10% difference in at
least one ratio, while some colors may have ratio differences 70% or more.
The CS64A was developed specifically for on-line color sensing applications, including:
• Distinguish between objects to ensure the correct color object is being processed on
your automated production line, such as vehicle headliners, door and body panels,
and seats
• Sort objects by color
• Monitor color variations of materials during manufacture such as carpets and ceramic
tile
• Detect presence of metal coatings or wood varnish
• Monitor color quality of granular foods such as sugar
• Detect paint marks where bar coding is impractical
• Detect over- or under-cooked baked goods
The diffuse LED lighting and large sensing area make the CS64A relatively immune to
material grain direction and similar variations. The CS64A-00's long standoff distance of
1.75 to 2" and sensor-to-target distance variation tolerance of 1.25 to 2.5" are important
benefits in many applications as well. The CS64A-02 has an extended standoff distance
of 4.75-5.00” while the CS64A-04-BNR has a very wide working range of 2.75” (3.00 to
5.75” sensor-to-object).
Each of the CS64A’s four 0-10V analog outputs has an adjustment potentiometer and an
indicator LED. The indicator LEDs come on when the output reaches about 2 volts and
the indicator LED intensity increase with amplitude.
The high-intensity LEDs in the CS64A’s lighting system have a typical life of 100,000
hours. (Actual intensity is 64 times higher than it appears since the LEDs are pulsed at a
low duty cycle).
The intensity of all LEDs varies with temperature due to the properties of the
semiconductor materials used. The CS64A sensors use feedback circuitry to maintain
amplitudes over a wide range of temperature and to compensate for light loss due to
normal LED aging. This feedback along with the long life of the LEDs, greatly reduces
the need for recalibration.
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1.2 Primary Features
• Superior color detection on a wide range
of materials
• Versatile analog outputs allow unlimited
sorting and show data trends
• Long sensing range and standoff distance
• Four color ranges are sensed—from blue
to near-infrared
• Near-infrared differentiates between
materials such as leather, vinyl, and cloth
• Robust LED lighting system—no light
bulbs to burn out
• Feedback compensation for LED aging
• Fast, one millisecond update rate
For more information on Delta’s growing lines of color sensors, motion controllers, and
other industrial products, visit our web site at:
www.deltacompsys.com
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2. Mounting the CS64A
In general, the sensing area should be as dark as possible (especially if small differences
in color are to be detected). Any light that is in the sensing area that is not generated by
the CS64A is a source of error. The Blue and Green colors are more sensitive to
extraneous light than are the Red and NIR colors since these LEDs are less intense.
Small amounts of constant light can sometimes be tolerated, but bright pulsing lights
(such as fluorescent) and sunlight should never be allowed to shine into the sensing area.
Direct sunlight can also cause overheating (or damage if it shines through the lens).
The CS64A-00 should be mounted such that the bottom is 1.75 to 2 inches from the
average target object position. The sensing range will be +-1/2 inch allowing for sensor
to object movement. (See
Specifications for standoff
and range for other models).
The CS64A’s lighting system
is much more intense than it
appears because of the low
duty cycle of its light emitting
diodes (LEDs). However, in
most applications it is
desirable to keep extraneous
light out of the sensing area.
This area includes not only
the area that is directly read
by the sensor (0.35” square
for the CS64A-00), but also
the immediate surrounding
surfaces since light will
reflect into the direct sensing
area. The optimum type of
light block depends on the
application and the
environment.
If it is possible that the
CS64A could be bumped hard
enough to cause damage, it
should be mounted such that
it is protected. To minimize
electrical noise, the CS64A
enclosure should be
grounded.
If the sensor is used in a wet
or corrosive area, order the
OEM package. This package
allows the CS64A to be
mounted inside a NEMA 4X
enclosure. For convenience, a window kit is also available.
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