Allen-Bradley Capacitive Label Sensor Installation Instructions
Allen-Bradley Capacitive Label Sensor is a reliable and versatile sensor designed for sensing and counting labels on a web. It's capable of consistently detecting various label types, including clear labels on clear or opaque backing, and opaque labels on clear or opaque backing. This sensor can count up to 50,000 labels per minute with registration error less than 0.01 inch.
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Description
The Rockwell Automation 45LFM–CMBA1–D5 Label Sensor
is an innovative electronic sensor used to sense and/or count
labels. A signal is generated as the edge of the label passes
through the sensor. It can be configured to sense the leading
or trailing edge.
Features
Consistently senses the presence of most labels on a web
Clear labels on clear backing
Clear labels on opaque backing
Opaque labels on clear backing
Opaque labels on opaque backing
Count 50,000 labels per minute with registration error less
than 0.01 inch
Heavy-duty metal housing
Ideal for label counting and label registering applications
Specifications
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Mounting the Sensor
Mount the sensor perpendicular to the web so the web
passes through the sensor gap. The back of the web should
contact the mounting plate. Labels must pass under sensing
area marked [––SENSOR––]. Small labels (38.1mm (1.5in))
must be centered under the sensing area.
Electrical Connections
ATTENTION: Unused wires must be
insulated from contact with other
objects. All power must be off when
installing the sensor. DC ground is
connected to sensor body.
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Power
Sensor can be powered with 11–30V DC but optimum
performance is obtained with 24V DC. The negative side of
the power supply is grounded to the sensor body.
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Outputs
The NPN and PNP outputs are open-collector outputs. The
NPN output can sink up to 150mA and the PNP output can
source up to 150mA. Outputs are short circuit protected by
self-resetting internal fuses. These fuses will activate if the
outputs are connected directly to ground or power. Repeated
shorting will eventually cause the sensor to fail.
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The PNP POWER IN voltage must be connected to a supply
voltage and must not exceed +Vin (+30V DC).
Output Polarity
Output polarity determines whether the output signal will go low or high on the label edge.
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Wiring Table
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7 <6
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9**=7 = * >: ,
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Power
Sensor can be powered with 11–30V DC but optimum
performance is obtained with 24V DC. The negative side of
the power supply is grounded to the sensor body.
7 ,
8 !
Outputs
The NPN and PNP outputs are open-collector outputs. The
NPN output can sink up to 150mA and the PNP output can
source up to 150mA. Outputs are short circuit protected by
self-resetting internal fuses. These fuses will activate if the
outputs are connected directly to ground or power. Repeated
shorting will eventually cause the sensor to fail.
9**
*
9**
*
6+
7 *
7 !
The PNP POWER IN voltage must be connected to a supply
voltage and must not exceed +Vin (+30V DC).
Output Polarity
Output polarity determines whether the output signal will go low or high on the label edge.
9**:12 3 :*(:: 1(*(,!
Wiring Table
*& 1 4 15 6 7* &/
;
,
7 <6
<*
9**= * <0
9**=7 = * >: ,
9** =?*7 ?
3
Adjusting Gain and Zero
These sensors are extremely stable and should not require adjustment after the initial setup. Adjustment will only be required
for significant changes in label shape or thickness, or changes in power supply voltage.
1. Remove all material from sensor.
2. Center GAIN ADJUST
Turn GAIN ADJUST four
(4) turns counter clockwise.
Turn GAIN ADJUST two
(2) turns clockwise.
3. Set ZERO ADJUST
Set ZERO ADJUST to the
point where the ZERO light
starts to come on.
4. Set GAIN ADJUST
Insert material into sensor.
While moving labels through
the sensor, Set GAIN ADJUST
to the point where the EDGE
light starts to flash. Then
continue turning 1/2 turn
clockwise.
5. Sensor is now ready for use.
How GAIN and ZERO adjustments affect the 45LFM–CMBA1–D5
The 45LFM–CMBA1–D5 is a dual capacitor type sensor.
Labels pass or move in the direction from C1 to C2 or vise
versa. The common plate of both capacitors is the base plate
that makes up the c-frame of the sensor. The electronics in
the sensor measure the difference between C1 and C2,
analog voltage = C1 – C2, which makes this sensor a
differential type sensor.
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When common material, web and label, is under both plates
C1 = C2 and the internal analog signal is 0 Volts. Also when
nothing is place in the sensor C1 = C2. When you press on
the BASE PLATE of 45LFM–CMBA1–D5 sensor and change
the gap of the sensor C1, for the most part, = C2. As material,
web and labels, pass through the sensor, it is the fact that the
gap of the label goes under C1 first that causes the analog
voltage to increase. Once the gap of the label is between C1
and C2 and common material is again under both capacitors,
the analog voltage returns to 0V. As the gap of the label
passes under C2, the analog voltage decreases. As common
material returns under both capacitors the analog voltage
returns to 0V. This 0V is the internal supply voltage and is not
the 0V supplying the power to the sensor.
/:*= *
Adjusting Gain and Zero
These sensors are extremely stable and should not require adjustment after the initial setup. Adjustment will only be required
for significant changes in label shape or thickness, or changes in power supply voltage.
1. Remove all material from sensor.
2. Center GAIN ADJUST
Turn GAIN ADJUST four
(4) turns counter clockwise.
Turn GAIN ADJUST two
(2) turns clockwise.
3. Set ZERO ADJUST
Set ZERO ADJUST to the
point where the ZERO light
starts to come on.
4. Set GAIN ADJUST
Insert material into sensor.
While moving labels through
the sensor, Set GAIN ADJUST
to the point where the EDGE
light starts to flash. Then
continue turning 1/2 turn
clockwise.
5. Sensor is now ready for use.
How GAIN and ZERO adjustments affect the 45LFM–CMBA1–D5
The 45LFM–CMBA1–D5 is a dual capacitor type sensor.
Labels pass or move in the direction from C1 to C2 or vise
versa. The common plate of both capacitors is the base plate
that makes up the c-frame of the sensor. The electronics in
the sensor measure the difference between C1 and C2,
analog voltage = C1 – C2, which makes this sensor a
differential type sensor.
<1
, 4/@8 @< 8
When common material, web and label, is under both plates
C1 = C2 and the internal analog signal is 0 Volts. Also when
nothing is place in the sensor C1 = C2. When you press on
the BASE PLATE of 45LFM–CMBA1–D5 sensor and change
the gap of the sensor C1, for the most part, = C2. As material,
web and labels, pass through the sensor, it is the fact that the
gap of the label goes under C1 first that causes the analog
voltage to increase. Once the gap of the label is between C1
and C2 and common material is again under both capacitors,
the analog voltage returns to 0V. As the gap of the label
passes under C2, the analog voltage decreases. As common
material returns under both capacitors the analog voltage
returns to 0V. This 0V is the internal supply voltage and is not
the 0V supplying the power to the sensor.
/:*= *
4
The gain adjustment is required in order to be sure the analog
voltage goes beyond two trip points. The first trip point is a
positive voltage point and turns the output on when the
analog voltage exceeds the trip voltage. While the second trip
point is a negative voltage point and turns the output off when
the analog voltage goes below the negative trip voltage.
Things that affect gain are: size of labels, both thickness and
width, and power supply voltage. Powering the sensor with
12V requires increased gain than when powering the sensor
with 24V. Thinner labels also require more gain for proper
detection. Too much gain can cause the sensor to pick up
certain types of ink on the label and cause false detection.
Output Polarity and Signal Waveforms
Output polarity is effected by the direction of label movement. Waveforms shown are for label movement shown in diagram.
Reversing label direction will invert waveforms.
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Dimensions—mm (inches)
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Publication 75009–193–01(A)
January 2003
Printed in USA
PHOTOSWITCH is a registered trademark of
Rockwell Automation.
The gain adjustment is required in order to be sure the analog
voltage goes beyond two trip points. The first trip point is a
positive voltage point and turns the output on when the
analog voltage exceeds the trip voltage. While the second trip
point is a negative voltage point and turns the output off when
the analog voltage goes below the negative trip voltage.
Things that affect gain are: size of labels, both thickness and
width, and power supply voltage. Powering the sensor with
12V requires increased gain than when powering the sensor
with 24V. Thinner labels also require more gain for proper
detection. Too much gain can cause the sensor to pick up
certain types of ink on the label and cause false detection.
Output Polarity and Signal Waveforms
Output polarity is effected by the direction of label movement. Waveforms shown are for label movement shown in diagram.
Reversing label direction will invert waveforms.
9** 9**
?*
7
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7
Dimensions—mm (inches)
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Publication 75009–193–01(A)
January 2003
Printed in USA
PHOTOSWITCH is a registered trademark of
Rockwell Automation.
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Key Features
- Label Counting
- Label Registration
- High Speed
- Various Label Types
- Heavy-Duty Construction
Related manuals
Frequently Answers and Questions
What kind of labels can this sensor detect?
It can detect clear labels on clear or opaque backing, opaque labels on clear or opaque backing, and labels on any other material that doesn't obstruct the sensor's signal.
How accurate is the label registration?
It has a registration accuracy of 0.025mm (0.01in).
What is the maximum speed of the sensor?
It can count up to 50,000 labels per minute.
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