KEYENCE LB-1000W User Manual

96M11353

Instruction
Manual

Laser Displacement Sensors

LB-1000(W) Series

CONTENTS

SAFETY INFORMATION ON LB-1000 SERIES

Safety Information for LB-1000 Series .................................................... 2

Safety Precautions on Laser Product ..................................................... 3

Precautions on Regulations and Standards ............................................ 6

Part Names ............................................................................................. 7

Connections ............................................................................................ 8

Installation ............................................................................................... 9

Setting ................................................................................................... 10

Auto Zero/Output Adjustment ............................................................... 10

Measuring Range vs. Analog Output .................................................... 11

Setting Dip Switch 1 (FUZZY logic control) ........................................... 12

Setting Dip Switch 2 (Interference suppression function) ..................... 13

Setting Dip Switch 3 (Laser power control) ........................................... 14

Setting Dip Switch 4 (AUTO ZERO) ..................................................... 14

Troubleshooting .................................................................................... 15

Hints on Correct Use ............................................................................. 16

Characteristics ...................................................................................... 17

Specifications ........................................................................................ 19

Dimensions ........................................................................................... 21

Warranty ............................................................................................... 23

This manual describes how to install the LB-1000 Series as well as its
operating procedures and precautions. Read this manual carefully for
your safety.

Symbols

The following symbols alert you to important messages. Be sure to read
these messages carefully.

WARNING

CAUTION

Note

Failure to follow instructions may lead to injury.
(electric shock, burn, etc.)

Failure to follow instructions may lead to product
damage.

Provides additional information on proper operation.

General precautions

• At startup and during operation, be sure to monitor the functions and
performance of the LB-1000 series.

• We recommend that you take substantial safety measures to avoid
any damage in the event a problem occurs.

• Do not open or modify the LB-1000 series or use it in any way other
than described in the specifications.

• When the LB-1000 series is used in combination with other instru­ments, functions and performance may be degraded, depending on
operating conditions and the surrounding environment.

• Do not use this product for the purpose to protect a human body or a
part of human body.

• This product is not intended for use as explosion-proof product. Do
not use this product in hazardous location and/or potentially explosive
atmosphere.

2

SAFETY PRECAUTIONS ON LASER PRODUCT

1. Classification

LB-041/ LB-081/ LB-301/

LB-1001(W) LB-1101(W) LB-1201(W)
FDA (CDRH) 21CFR Part 1040.10 Class IIIa IIIb
IEC/EN 60825-1 Class 2M Class 3R Class 3B

2. Labels

FDA (CDRH) Class IIIa FDA (CDRH) Class IIIb
[LB-041/1001(W) [LB-301/1201(W)]
LB-081/1101(W)]

AVOID EXPOSURE

VISIBLE LASER RADIATION IS
EMITTED FROM THIS APERTURE

DANGER

VISIBLE LASER RADIATION AVOID
DIRECT EXPOSURE TO BEAM

SEMICONDUCTOR LASER 670nm
MAXIMUM OUTPUT 3mW
PULSE DURATION 35µSEC
CLASS IIIa LASER PRODUCT

DANGER - Visible laser radiation when open

AVOID DIRECT EXPOSURE TO BEAM

IEC Class 2M [LB-41] IEC Class 3R [LB-81]

IEC Class 3B [LB-301]

AVOID EXPOSURE

INVISIBLE LASER RADIATION IS
EMITTED FROM THIS APERTURE

DANGER

INVISIBLE LASER RADIATION AVOID
DIRECT EXPOSURE TO BEAM

SEMICONDUCTOR LASER 780nm
MAXIMUM OUTPUT 20mW
PULSE DURATION 35µSEC
CLASS IIIb LASER PRODUCT

DANGER - Invisible laser radiation when open

AVOID DIRECT EXPOSURE TO BEAM

3. Labels location

FDA Warning labels are attached to the sensor head as shown below.
When using this product in the countries and/or regions other than
U.S.A., use the IEC warning/explanatory label in the package of this
product. In this case, it can be affixed on the FDA (CDRH) warning label,
which has already been affixed to this product.

FDA (CDRH)

LB-041 LB-081

AVOID EXPOSURE

VISIBLE LASER RADIATION IS

EMITTED FROM THIS APERTURE

DANGER

VISIBLE LASER RADIATION AVOID

DIRECT EXPOSURE TO BEAM

SEMICONDUCTOR LASER 670nm

MAXIMUM OUTPUT 3mW

PULSE DURATION 35µSEC

CLASS IIIa LASER PRODUCT

LB-301

AVOID EXPOSURE

LB-041

DANGER

AVOID EXPOSURE

VISIBLE LASER RADIATION IS
EMITTED FROM THIS APERTURE

DANGER

VISIBLE LASER RADIATION AVOID
DIRECT EXPOSURE TO BEAM

SEMICONDUCTOR LASER 670nm
MAXIMUM OUTPUT 3mW
PULSE DURATION 35µSEC
CLASS IIIa LASER PRODUCT

DANGER - Visible laser radiation when open

AVOID DIRECT EXPOSURE TO BEAM

AVOID EXPOSURE

DANGER

AVOID EXPOSURE

VISIBLE LASER RADIATION IS

EMITTED FROM THIS APERTURE

DANGER

VISIBLE LASER RADIATION AVOID

DIRECT EXPOSURE TO BEAM

SEMICONDUCTOR LASER 670nm

MAXIMUM OUTPUT 3mW

PULSE DURATION 35µSEC

CLASS IIIa LASER PRODUCT

LB-081

AVOID EXPOSURE

VISIBLE LASER RADIATION IS
EMITTED FROM THIS APERTURE

DANGER

VISIBLE LASER RADIATION AVOID
DIRECT EXPOSURE TO BEAM

SEMICONDUCTOR LASER 670nm
MAXIMUM OUTPUT 3mW
PULSE DURATION 35µSEC
CLASS IIIa LASER PRODUCT

DANGER - Visible laser radiation when open

AVOID DIRECT EXPOSURE TO BEAM

3

SAFETY PRECAUTIONS ON LASER PRODUCT

4. Safety consideration

CAUTION

Use of controls or adjustments or the performance of procedures other
than those specified herein may result in hazardous radiation exposure.

1) Class IIIb/3B laser products

WARNING

Follow the instructions mentioned in this manual. Otherwise, injury to the
human body (eyes and skin) may result.

• Do not directly look at or touch the laser beam and its reflection
from a mirror-like surface.

• Do not direct the beam at other people or into areas where other
people unconnected with the laser work might be present.

• Be careful of the path of the laser beam. Make the laser path as
short as possible and be sure to terminate the laser path with a
diffusion reflector or diffusion absorber with proper reflectance
and thermal characteristics so that the laser beam does not
diffuse. (It is recommended that you install a protective enclo­sure.)

• Install the laser product carefully so that the laser beam is not
unintentionally directed at mirror-like surfaces.

• Install the products so that the path of the laser beam is not as
the same height as that of human eye.

• Wear protective eye goggles appropriate for the laser beam
wavelength.

• Do not disassemble this product. Laser emission from this
product is not automatically stopped when it is disassembled.

• Clean the aperture regularly. In addition, stop the emission of the
laser beam when cleaning.

• MPE (Maximum Permissible Exposure): 1.66mW/cm

• NOHD (Nominal Ocular Hazard Distance): 17.2 m (LB-301) from
the aperture.

2

(LB-301)

2) Class IIIa/3R laser products

WARNING

Follow the instructions mentioned in this manual. Otherwise, injury to the
human body (eyes and skin) may result.

• Do not directly look at or touch the laser beam and its reflection
from a mirror-like surface.

• Do not direct the beam at other people or into areas where other
people unconnected with the laser work might be present.

• Be careful of the path of the laser beam. Make the laser path as
short as possible and be sure to terminate the laser path with a
diffusion reflector or diffusion absorber with proper reflectance
and thermal characteristics so that the laser beam does not
diffuse. (It is recommended that you install a protective enclo­sure.)

• Install the laser product carefully so that the laser beam is not
unintentionally directed at mirror-like surfaces.

• Install the products so that the path of the laser beam is not as
the same height as that of human eye.

• Do not disassemble this product. Laser emission from this
product is not automatically stopped when it is disassembled.

4

SAFETY PRECAUTIONS ON LASER PRODUCT

3) Class 2M laser products

WARNING

Viewing the laser output with certain optical instruments designed for
use at a distance (for example, telescopes and binoculars) may pose an
eye hazard.

Follow the instructions mentioned in this manual. Otherwise, injury to the
human body (eyes and skin) may result.

• Do not stare into the beam.

• Do not direct the beam at other people or into areas where other
people unconnected with the laser work might be present.

• Be careful of the path of the laser beam.

If there is a danger that the operator may be exposed to the laser
beam reflected by specular or diffuse reflection, block the beam by
installing an enclosure with the appropriate reflectance.

• Install the products so that the path of the laser beam is not as
the same height as that of human eye.

• Do not disassemble this product. Laser emission from this
product is not automatically stopped when it is disassembled.

5. Safety features provided with the LB-1000
series

The LB-1000 series is provided with the following safety features. Make
sure these features function correctly before operating.

1. Laser radiation emission warning

A visible LED informs you that the laser beam is being emitted, or is
about to be emitted, at least 3 second after power is provided to the
controller and the sensor head.

2. Laser emission delay

Laser emission only starts after the LED has been ON for at least 3
seconds, thus decreasing the possibility of laser exposure.

3. Laser emission stop input terminals

Terminals for controlling laser emission are provided on the controller.
You can remotely control laser emission using these terminals.

4. Key-operated switch

Set to the ON position to supply power. You can lock the power switch
using the supplied key; the key can be removed only when the switch
is set to the OFF position.

5. Beam attenuator

A laser beam shield is supplied. This cover is to be attached to the
laser-beam-emitting portion of the sensor head. If an operator must
work in front of the sensor head and there is risk to the eyes from the
laser beam, be sure to attach this cover.

5

SAFETY PRECAUTIONS ON LASER PRODUCT

For use with shield:

Attach the shield to the front surface of the sensor head.

LB-041/LB-081 LB-301

For use without shield:

Place the shield as shown below, and screw in place.

LB-041/LB-081 LB-301

PRECAUTIONS ON REGULATIONS AND STANDARDS

CE Marking

Applicable Models: LB-041/LB-1001W, LB-081/LB-1101W and

Keyence Corporation has confirmed that these products comply with the
essential requirements of the applicable EC Directives, based on the
following specifications. Be sure to consider the following specifications
when using these products in the Member State of European Union.

■ EMC Directive (2004/108/EC)

• Applicable Standard EMI: EN61326-1, Class A

•

The length of the cable connected to the Sensor head or the Control­ler must be less than or equal to 30 m.

Remarks:

These specifications do not give any guarantee that the end-product with
these products incorporated complies with the essential requirements of
EMC Directive. The manufacturer of the end-product is solely responsible
for the compliance on the end-product itself according to EMC Directive.

LB-301/ LB-1201W

EMS: EN61326-1

6

PART NAMES

Controller

5

4

Beam attenuator

LASER ON alarm LED

Sensor head

1
Key-operated

power switch

2

6
7

3

1 Indicators

TIM: Timing indicator
STB: Stability indicator (3-color indicator)
BRIGHT: Excessive light quantity indicator
DARK: Insufficient light quantity indicator
LASER ON: Laser radiation emission warning

2 RESPONSE speed selector switch

Used to select response speed (0.4 ms, 10 ms, or 40 ms)

3 SENS (sensitivity) selector switch

Used to select WHITE, BLACK, or AUTO mode.

4 DIP switches (see p.11)

Used to switch to FUZZY logic control, alternating oscillation circuit,
etc.

5 Output adjustment trimmers

SPAN: Span adjustment
For adjusting output voltage level relative to target displacement.
SHIFT: Zero point adjustment
For shifting output voltage reading to zero.

6 AUTO ZERO key

For resetting the analog output to 0 V (12 mA for current output).

7 Receptacle for sensor head cable

7

CONNECTIONS

LB-1001/1101/1201

CAUTION

Be sure to confirm
the model number.

* GND terminals

4, 0, and B
are connected
internally.

■ Description of terminals

3 Earth ground terminal

5 Alarm output (NPN open-collector)

Outputs if light quantity is insufficient or excessive, or when no target
is present in the operating range.

6 AUTO ZERO input

Connecting this terminal to a GND terminal (4, 0, or B) resets the
analog voltage output to 0 V (12 mA for current output).

9 Analog current output

Current of 4 to 20 mA relative to full measuring range is output.

CAUTION

LB-1001W/1101W/1201W

CAUTION

8

CAUTION

Be sure to confirm
the model number.

* GND terminals

4, 0, and B
are connected
internally.

A Laser emission stop input

Disconnecting this terminal from a GND terminal (4, 0, or B) stops
laser emission. Use this terminal in an emergency to stop laser
emission. (Output will be retained at 12 V.)

C Synchronous (timing) input

Connecting this terminal to a GND terminal (4, 0, or B) permits
timing input. Laser emission will stop, and the analog output value just
prior to timing input will be retained. (DIP switch 2 of the controller
must be set to MAIN.)

D Synchronous (timing) output

When using 2 sensors (for thickness measurement, etc.), use this
terminal to prevent mutual interference. It allows 2 sensors to
alternately emit a laser beam at oscillation output of 30 Hz. (Set DIP
switch 2 of one controller to MAIN, and the other to SUB.)

CONNECTIONS

INSTALLATION

■ Description of DIP switches

RESPONSE

MANUAL

1 2 3 4

DIP

FUZZY SUB AUTO LOCK

MAIN

1 RESPONSE speed mode selector switch

To use the FUZZY logic control circuit, set the switch to FUZZY.

2 Interference suppression function selector switch

To have 2 sensors emit laser beams alternately, set the switch of one
controller to MAIN and the other to SUB.

3 Laser power control selector switch

MAX: Laser emission power is set to maximum.
AUTO: Laser emission power is controlled according to changes in

received light quantity. (Selecting AUTO mode prevents
fluctuations in received light quantity caused by surface
unevenness from affecting target measurement.

4 AUTO ZERO setting lock

LASER

POWER

MAX

ZERO
FREE

Controller

The controller can be mounted to a DIN
rail. When mounting or removing the
controller, pull the claw (bottom center) in
the direction of the arrow. The controller
can also be screw-mounted using the
mounting holes provided.

Sensor head

1. First, tilt the receptacle of the controller

forward, as shown.

2. To attach the connector, gently press

the plug into the receptacle, turn the
plug left or right to locate the engaging
position, then press until you hear a
click.

(Also follow this procedure to connect an
extension cable or sensor head cable to the
receptacle.)

To remove the connector, hold the
connecting sleeve as shown, and pull it
out in the direction of the arrow.

Mounting the sensor head

The sensor head has mounting holes, as
shown in the figure on the right.
Secure the sensor head using M4
screws.

(LB-301 has three mounting holes.)

9

SETTING

AUTO ZERO/OUTPUT ADJUSTMENT

1. Adjust the distance between the sensor head and target and confirm
the position with the LASER ON alarm LED. Set the sensor head so
that the laser emitting surface is parallel to the measuring surface of
the target, then secure it in place. (See figure below.)

Distance between sensor head and target

Out of
measuring
range
(Operating range)

Red Yellow Green Yellow Red

Measuring range

Center

Out of
measuring
range
(Operating range)

LASER ON
alarm LED

When the LED lights green, the target is in the center area of the
measuring range.

LB-041: approx. 40 mm
LB-081: approx. 80 mm
LB-301: approx. 300 mm

2. Adjust orientation of the sensor head (for a moving target).
Be sure to mount the sensor head as shown in the right-hand figure
below to ensure stable measurement.

Example: Step detection

Incorrect

Correct

Example: Eccentricity measurement

Press the AUTO ZERO key to reset the output voltage to zero at the
mounting position.

Example: LB-041

The LED light green.

ZERO Panel meter

Approx.
40 mm

*12 mA for
current output.

V

AUTO ZERO setting is possible from external terminals (connecting the
6 terminal to a GND terminal).
* The AUTO ZERO function can be used when the DIP switch No. 3 of

the controller is set to FREE (top setting).

Output adjustment

If the output voltage value is not in proportion with the target displace­ment, adjust the output voltage using the SPAN adjustment trimmer.

Example: LB-041

40 mm

V V

Change by 2 mm

(To change

-2.010 to -2.000.)

38 mm

Span adjustment

adjustment +0.010.

SPN-ADJ

V

10

Incorrect

Correct

When a sensor is positioned on both sides of a

Note

target for measurement, be sure to adjust the span
of each sensor separately.

MEASURING RANGE VS. ANALOG OUTPUT

OFF

LB-041/LB-1001(W)

LB-081/LB-1101(W)

Spot size (mm)

Alarm output (N.C.)

Spot size (mm)

Alarm output (N.C.)

LB-041

1.1

2.2

35 mm

35 37.5 40 42.5 45

ON
OFF

1.2

2.3

65 mm 30 mm

ON
OFF

1.0

0.9

2.0

10 mm

Measuring range

12

7

6

(20 mA)

5

Analog output voltage (V)

4

3

2

1

(12 mA)

0

-1

Measuring distance (mm)

-2

-3

-4
(4 mA)

-5

-6

-7

1.0

0.9

2.0

Measuring range

12

7

6

(20 m A)

5

Analog output voltage (V)

4

3

2

1

(12 mA)

0

72.5 80 87. 5 9565

-1

Measuring distance (mm)

-2

-3

-4
(4 mA)

-5

-6

-7

LB-301/LB-1201(W)

1.8

Spot size (mm)

Alarm output (N.C.)

200 mm

ON

1.4

3.0

1.2

2.5

200 mm

Measuring range

12

7
6

(20 mA)

5
4

Analog output voltage (V)

3

2
1
0

250 300200 350 400

Measuring distance (mm)

-1

-2

-3

-4
(4 mA)

-5

-6

-7

1.0

(12 mA)

2.2

If the target is out of the measuring range:

1.7

Less than 200 mm from the sensor: Analog output is retained at 12 V
when the target is approximately 195 mm away from the sensor.
More than 400 mm from the sensor: Analog output is retained at 12 V
when the target is approximately 405 mm away from the sensor.

11

SETTING DIP SWITCH 1 (FUZZY LOGIC CONTROL)

To use the FUZZY logic control circuit, set DIP switch 1 to FUZZY
(bottom setting).
(The switch is factory-set to MANUAL)

1234

DIP

The FUZZY logic control circuit is used to obtain both stability and high
response speed when measuring a target traveling on a production line.

FUZZY mode is selected using the RESPONSE speed selector switch.

RESPONSE

LO HIGH MID

FUZZY mode settings

• RESPONSE speed selector switch MID
Select for normal measurement. The optimal response speed is given
according to absolute light quantity and changes in distance and light
quantity received.

* The switch should normally be set to MID. Set to HIGH or LO only

when you cannot perform accurate measurement with MID.

• RESPONSE speed selector switch HIGH
Response speed is determined based mainly on changes in distance.
Set to HIGH when positioning for stepped target detection, or
detection of target recesses or projections.

• RESPONSE speed selector switch LO
Response speed is determined based mainly on changes in received
light quantity. When detecting hairline finishes or targets of mottled
material, setting the switch to LO will stabilize the output.

12

SETTING DIP SWITCH 2 (INTERFERENCE SUPPRESSION FUNCTION)

When using 2 sensor heads in close proximity, set the DIP switch of one
controller to MAIN, and that of the other to SUB to suppress interference.
(This can also be used for synchronized measurement.)

DIP 1 2 3 4

Wire as follows. (Upper terminals of controller)

10 11 12 13 14 10 11 12 1413

Set DIP switch 2 to MAIN Set DIP switch 2 to SUB

Example: Step measurement using 2 sensors.

Alternating oscillation frequency and ON/OFF ratio (all models)

Frequency ON/OFF ratio

30Hz 1 : 1

Synchronous
(timing) pulse

AB

ON
OFF

Note

• Controller set to MAIN: Monitor output is retained when the synchro-

nous (timing) pulse is OFF.

Controller set to SUB: Monitor output is retained when the synchro-

nous (timing) pulse is ON.

• Controller set to MAIN: The laser beam is emitted at the rising edge

of the synchronous (timing) pulse, but the
signal is not read for 8 to 10 ms. Effective
measurement occurs only during the last half
of the synchronous (timing) pulse (6 to 8 ms).

Controller set to SUB: The laser beam is emitted at the falling edge

of the synchronous (timing) pulse, but the
signal is not read for 8 to 10 ms. Effective
measurement occurs only during the last half
of the synchronous (timing) pulse (6 to 8 ms).

Synchronous
(timing) pulse (TIM OUT)

Controller set to MAIN
Laser emission

Controller set to MAIN
Data reading

Controller set to SUB
Laser emission

Approx.

6 to 8 ms

Controller set to SUB
Data reading

Approx. 6 to 8 ms

13

SETTING DIP SWITCH 3
(LASER POWER CONTROL)

SETTING DIP SWITCH 4
(AUTO ZERO)

Laser power control

DIP

1234

When the DIP switch is set to AUTO (bottom setting), emitted laser beam
quantity is automatically controlled according to the reflectivity of the
target. The switch is factory-set to MAX.

The AUTO mode is especially effective for measuring metal targets or
targets of a mottled material.

AUTO ZERO setting lock

DIP

1234

DIP switch 4 is factory-set to FREE. In this mode, AUTO ZERO can be
performed by either using the key on the controller panel or short
circuiting the terminals.

To prevent the output voltage from being mistakenly reset to zero, disable
AUTO ZERO by setting the switch to LOCK (bottom setting).

Note:

• The SHIFT adjustment trimmer on the controller panel functions only
when the switch is set to LOCK.

• When AUTO ZERO is used with the DIP switch set to FREE and then
the switch is switched to LOCK, the AUTO ZERO setting becomes
invalid and the AUTO ZERO function is disabled.

Caution:

After DIP switch 4 has been switched between FREE and LOCK, be
sure to turn the power supply OFF once and then ON again.

14

TROUBLESHOOTING

If a problem occurs, first apply the remedy given in the troubleshooting
guide below.
If this does not solve the problem, please contact your nearest distributor
or Keyence office.

Problem Cause Remedy

Analog voltage
does not change.
(Measured value is
not indicated.)

Analog voltage
output fluctuates.

Sensor head is
incorrectly mounted.

Connector of sensor head is
not firmly inserted.

BRIGHT or DARK indicator
is lit.

Filter glass of sensor head
is dirty

Noise is affecting sensor
operation.

There is vibration in feeder
line.

Secure sensor head in range
where LASER ON alarm LED
lights yellow or green.

Fully insert connector to make
proper contact.

Adjust position and orientation of
the sensor head to increase or
decrease the light quantity
received.

Set DIP switch 3 to AUTO
(bottom setting) to control laser
power.

Switch sensitivity selector switch.

Clean using a soft cloth.

Isolate power cable and
connecting cable(s) of sensor
from high-tension lines or power
lines.

Minimize vibration near
measuring position.

Problem Cause Remedy

Resolution
fluctuates greatly.

Measurement is
inaccurate.

When 2 sensors
are used for
thickness
measurement, etc.,
analog output
voltage fluctuates
greatly.

Output voltage value is not
in proportion with target
displacement.

RESPONSE speed selector
switch is set to HIGH
(0.4 ms).

Target is moving.

Extraneous light is affecting
sensor operation.

SPAN adjustment has been
performed for only one
sensor.

Calibrate output voltage using
SPAN adjustment trimmer.

If high response speed is not
required, select lowest possible
response speed.

Set DIP switch 1 to FUZZY and
use FUZZY logic control.

Make sure that extraneous light
does not fall on the light emitting/
receiving lenses of the sensor
head.

Perform SPAN adjustment for
each sensor separately.

15

HINTS ON CORRECT USE

Compatibility

The controller and sensor head of the LB-1000 series have been factory­calibrated in pairs. Therefore, in order to satisfy specifications, be sure to
use a sensor head and controller having the same serial number.

Interference prevention

• Isolate the power cable and connecting cable(s) of the sensor from
high-tension lines or power lines; otherwise the sensor may malfunc­tion or the laser diode may deteriorate or be broken due to noise
interference.

• The sensor head is case-grounded. If noise occurs at the mounting
position of the sensor head, install insulation between the mounting
position and sensor head.

• To prevent radiation noise interference, cover the sensor head with a
metal casing. (Be sure that noise does not enter at the mounting
position of the casing.)

• To prevent radiation noise and inductive noise interference, shield the
cables with metal or use independent metal conduits.

• To avoid a malfunction due to excessive noise interference, be sure to
correctly ground the earth ground terminal.

Operating environment

• Always keep the sensor head free from light-refracting substances
such as water or oil.

• Make sure that extraneous light does not fall on the lenses of the
sensor head.

• When extremely high measurement accuracy is required, install a
cover over the sensor head to prevent light from entering.

• When no target is present, the effect of extraneous light on the sensor
can be ignored by using timing input.

16

CAUTION

CAUTION

CAUTION

AUTO ZERO function lock (DIP switch 4 )

• When DIP switch 4 is set to LOCK (bottom setting), the AUTO ZERO
key on the front panel does not function. Note that when the switch is
set to FREE, the AUTO ZERO function operates but the SHIFT
adjustment trimmers cannot be used to adjust output.

• When AUTO ZERO is used with the DIP switch set to FREE and then
the switch is switched to LOCK, the AUTO ZERO setting becomes
invalid, and the AUTO ZERO function is disabled.

• After switching between FREE and LOCK, turn the power supply OFF
once and then ON again to ensure that the monitor voltage will be
normally output.

Sensor head orientation

When a target consists of differently colored portions or different
materials separated by a border, measurement error may result
depending on the orientation of the sensor head. To minimize measure­ment deviation, install the sensor head parallel to the border line as
shown in the illustration below.

Incorrect Correct

Operating illumination

Although the operating illumination is specified to 2,500 lux max., (LB­301: 4000 lux max.) if possible avoid using the sensor near lighting
equipment that emits light in recurring pulses. If the sensor must be
positioned near such equipment, minimize the effect by using a light
shielding plate.

Note

Note

CHARACTERISTICS (TYPICAL)

■ LB-041/LB-1001(W): 40 mm ± 5 mm

Shift-point adjustment range Span adjustment range

Changes in detection span when target is tilted Changes in detection span when target is tilted

■ LB-081/LB-1101(W): 80 mm ± 15 mm

Shift-point adjustment range Span adjustment range

The shift-point adjustment range shows the range where the output voltage reading can be shifted to zero using the SHIFT adjustment trimmer (oper­ates when DIP switch 4 is set to LOCK). The AUTO ZERO function (operates when DIP switch 4 is set to FREE), allows 0.V resetting at any position
within the measuring range.

17

CHARACTERISTICS (TYPICAL)

■ LB-301/LB-1201(W): 300 mm ± 100 mm

Shift-point adjustment range Span adjustment range

Changes in detection span when target is tilted

The shift-point adjustment range shows the range where the output
voltage reading can be shifted to zero using the SHIFT adjustment
trimmer (operates when DIP switch 4 is set to LOCK). The AUTO
ZERO function (operates when DIP switch 4 is set to FREE), allows 0.V
resetting at any position within the measuring range.

18

■ Frequency characteristic

Common to LB-1001(W), LB-1101(W), and LB-1201(W)
RESPONSE speed selector switch set to HIGH

Analog output
voltage (dB)

0

-10

-20

-30

915 Hz (-3dB)

100 1 K
Frequency (Hz)

RESPONSE speed selector switch set to MID

Analog output
voltage (dB)

0

-10

-20

-30

36 Hz (-3dB)

10 100

Frequency (Hz)

RESPONSE speed selector switch set to LO

■ Interference range*

a

XY

b

XY

LB-041 40 mm 20 mm 40 mm
LB-081 50 mm 30 mm 80 mm
LB-301 200 mm 180 mm 290 mm

* Use of the interference suppression function enables close mounting

of 2 sensors. Since sensors “X” and “Y” alternately emit a laser beam
at 30 Hz, interference does not occur. (Target: white paper)

c

XY

SPECIFICATIONS

Type High resolution Standard Long range
Model Sensor head LB-041 LB-081 LB-301

Reference distance 40 mm 80 mm 300 mm
Measuring range ±5 mm ±15 mm ±100 mm
Light source Visible red semiconductor laser

Output 3.0 mW (FDA), 2.0 mW (IEC) 3.0 mW (FDA), 2.5 mW (IEC) 20 mW (FDA), 15 mW (IEC)
Pulse duration 35 µs
Wavelength 670 nm 785 nm
Laser FDA (CDRH) 21CFR Part 1040.10 Class IIIa Class IIIb

Class IEC/EN 60825-1 Class 2M Class 3R Class 3B
Spot diameter (with white paper) 1 x 2 mm (at reference distance)
Linearity 0.25% of F.S. 0.4% of F.S.
Resolution (at LO mode) 2 µm 8 µm 50 µm
Output Analog voltage ±5 V (1 mm/V) ±5 V (3 mm/V) ±5 V (20 mm/V)

Adjustment range Zero-point ±0.35 V max.

Response frequency (-3 dB) 915 Hz (HIGH), 36 Hz (MID), 9 Hz (LO)
Sensitivity WHITE, BLACK and AUTO (switch selectable)
Other functions AUTO ZERO, Response speed selectable, Fuzzy logic control, Interference suppression
Temperature Sensor head 0.02% of F.S./°C
fluctuation Controller 0.02% of F.S./°C
Ambient light
Ambient Sensor head 0 to +45°C (32 to 113°F)
temperature Controller 0 to +50°C (32 to 122°F), No condensation
Relative humidity 35 to 85%, No condensation
Power supply 100 to 240 VAC ±10% 50/60 Hz
Power consumption Approx. 15 VA
Vibration resistance 10 to 55 Hz, 1.5 mm double amplitude in X, Y, and Z directions, 2 hours respectively
Material Sensor head Aluminum die-cast

Weight Sensor head Approx. 170 g Approx. 250 g

1. Every measuring point within measuring range can be shifted to zero with the AUTO ZERO
function.

2. Incandescent/fluorescent lamps
The LB-1000 series controller and sensor head are calibrated as a pair. Therefore, to satisfy
specifications, combine units having the same serial number.

Controller LB-1001 LB-1101 LB-1201

Invisible infrared semiconductor laser

1.2 x 2.5 mm (at reference distance)

Impedance 100 Ω
Analog current 4 to 20 mA (350 Ω max.)
Alarm NPN open-collector: 100 mA (40 V) max. (N.C.) Residual voltage: 1 V max.

Span ±4% max.

2.

Controller Polycarbonate

Controller Approx. 530 g

2,500 lux max. 4,000 lux max.

1.

Option

Extension cable

The sensor head cable can be extended up to 40 m.

Model Cable length
LB-C2 2 m

LB-C3 3 m
LB-C8 8 m

19

SPECIFICATIONS

Type High resolution Standard Long range
Model Sensor head LB-041 LB-081 LB-301

Reference distance 40 mm 80 mm 300 mm
Measuring range ±5 mm ±15 mm ±100 mm
Light source Visible red semiconductor laser

Output 3.0 mW (FDA), 2.0 mW (IEC) 3.0 mW (FDA), 2.5 mW (IEC) 20 mW (FDA), 15 mW (IEC)
Pulse duration 35 µs
Wavelength 670 nm 785 nm
Laser FDA (CDRH) 21CFR Part 1040.10 Class IIIa Class IIIb

Class IEC/EN 60825-1 Class 2M Class 3R Class 3B
Spot diameter (with white paper) 1 x 2 mm (at reference distance)
Linearity 0.25% of F.S. 0.4% of F.S.
Resolution (at LO mode) 2 µm 8 µm 50 µm
Output Analog voltage ±5 V (1 mm/V) ±5 V (3 mm/V) ±5 V (20 mm/V)

Adjustment range Zero-point ±0.35 V max.

Response frequency (-3 dB) 915 Hz (HIGH), 36 Hz (MID), 9 Hz (LO)
Sensitivity WHITE, BLACK and AUTO (switch selectable)
Other functions AUTO ZERO, Response speed selectable, Fuzzy logic control, Interference suppression
Temperature Sensor head 0.02% of F.S./°C
fluctuation Controller 0.02% of F.S./°C
Ambient light
Ambient Sensor head 0 to +45°C (32 to 113°F)
temperature Controller 0 to +50°C (32 to 122°F), No condensation
Relative humidity 35 to 85%, No condensation
Power supply 24 VDC ± 10%, Ripple (P-P): 10% max.
Current consumption (Max.) Approx. 320 mA Approx. 350 mA
Vibration resistance 10 to 55 Hz, 1.5 mm double amplitude in X, Y, and Z directions, 2 hours respectively
Material Sensor head Aluminum die-cast

Weight Sensor head Approx. 170 g Approx. 250 g

1. Every measuring point within measuring range can be shifted to zero with the AUTO ZERO
function.

2. Incandescent/fluorescent lamps
The LB-1000 series controller and sensor head are calibrated as a pair. Therefore, to satisfy
specifications, combine units having the same serial number.

Controller LB-1001W LB-1101W LB-1201W

Invisible infrared semiconductor laser

1.2 x 2.5 mm (at reference distance)

Impedance 100 Ω
Analog current 4 to 20 mA (350 Ω max.)
Alarm NPN open-collector: 100 mA (40 V) max. (N.C.) Residual voltage: 1 V max.

Span ±4% max.

2.

Controller Polycarbonate

Controller Approx. 500 g

2,500 lux max. 4,000 lux max.

1.

Option

Extension cable

The sensor head cable can be extended up to 40 m.

Model Cable length
LB-C2 2 m

LB-C3 3 m
LB-C8 8 m

20

DIMENSIONS

Unit: mm

Sensor head

LB-041/LB-081

Data in ( ) applies to LB-081.
All other dimension are the
same for both models.

62

4

2 x φ 4.5
mounting hole

LASER ON
alarm LED

(65 to 95)

35 to 45

54

56

28° (18°)

Reference position

13

52 60

Controller

LB-301

φ 7

52 60

4

3 x φ 4.5
mounting hole

φ 15

43

190

28

14

φ

15

43

φ 7

4

190

25

LASER ON
alarm LED

56

200 to 400

12.5

85

77

4

38.5

9°

15.5

LB-1001(W)/LB-1101(W)/
LB-1201(W)

21

22

WARRANTIES AND DISCLAIMERS

(1) KEYENCE warrants the Products to be free of defects in materials and workmanship for a period of one (1) year from the date of shipment. If any models

or samples were shown to Buyer, such models or samples were used merely to illustrate the general type and quality of the Products and not to
represent that the Products would necessarily conform to said models or samples. Any Products found to be defective must be shipped to KEYENCE
with all shipping costs paid by Buyer or offered to KEYENCE for inspection and examination. Upon examination by KEYENCE, KEYENCE, at its sole
option, will refund the purchase price of, or repair or replace at no charge any Products found to be defective. This warranty does not apply to any defects
resulting from any action of Buyer, including but not limited to improper installation, improper interfacing, improper repair, unauthorized modification,
misapplication and mishandling, such as exposure to excessive current, heat, coldness, moisture, vibration or outdoors air. Components which wear are
not warranted.

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E 1110-2

23

Copyright (c) 2010 KEYENCE CORPORATION. All rights reserved. 1422E 1110-2a 96M11353 Printed in Japan