KEYENCE LB-70W User Manual

96M11273

Instruction
Manual

Laser Displacement Sensors

LB-70(W) Series

CONTENTS

WARNING

CAUTION

SAFETY INFORMATION FOR LB-70 SERIES

Safety Information for LB-70 Series ........................................................ 2

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

Precautions on Regulations and Standards............................................ 5

Part Names ............................................................................................. 6

Connections ............................................................................................ 7

Installation ............................................................................................... 8

Adjustment .............................................................................................. 9

Troubleshooting .................................................................................... 11

Hints on Correct Use............................................................................. 12

Characteristics ...................................................................................... 13

Specifications ........................................................................................ 15

Dimensions ........................................................................................... 17

Warranty ............................................................................................... 19

This manual describes how to install the LB-70 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.

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

Failure to follow instructions may lead to product
damage.

Note

Provides additional information on proper operation.

General precautions

• At startup and during operation, be sure to monitor the functions and
performance of the LB-70 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-70 series or use it in any way other than
described in the specifications.

• When the LB-70 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 a hazardous location and/or potentially
explosive atmosphere.

2

SAFETY PRECAUTIONS ON LASER PRODUCT

1. Classification

LB-11(W) LB-12(W)

FDA (CDRH) 21CFR Part 1040.10 Laser Class IIIb
IEC/EN 60825-1

Laser Class 3R Laser Class 1

2. Labels

FDA (CDRH) Class IIIb
[LB-11(W)]

IEC Class 3R [LB-11(W)]

FDA (CDRH) Class IIIb
[LB-12(W)]

3. Labels location

FDA Warning labels are attached to the sensor head as shown below.
When using LB-11(W) in the countries and/or regions other than U.S.A.,
use the IEC warning/explanatory label in the package of LB-11(W). In
this case, it can be affixed on the FDA (CDRH) warning label, which has
already been affixed to LB-11(W).

LB-11(W)
FDA (CDRH)

LB-12(W)
FDA (CDRH)

AVOID EXPOSURE

LASER RADIATION IS EMITTED

FROM THIS APERTURE

INVISIBLE LASER RADIATION AVOID

DIRECT EXPOSURE TO BEAM

SEMICONDUCTOR LASER 780nm

MAXIMUM OUTPUT 3mW
PULSE DURATION 15µs

CLASS IIIb LASER PRODUCT

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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.

Class IIIb/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.

• 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.

Class 1 Laser Product

WARNING

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 disassemble this product. Laser emission from this

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product is not automatically stopped when it is disassembled.

5. Safety features provided with the LB-70
series.

The LB-70 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.

SAFETY PRECAUTIONS ON LASER PRODUCT
For use with shield:

Attach the shielding cover to the front surface of the light source lens
and secure it using the supplied screw.

Beam attenuator

Aperture

[The above figure shows the appearance
of the LB-12(W).]

Laser radiation emission warning

For use without shield:

Secure the shielding cover to the screw hole on the rear of the sensor
head using the supplied screw.

Beam attenuator

Laser radiation emission warning

PRECAUTIONS ON REGULATIONS AND STANDARDS

CE Marking

Applicable Models: LB-11W/LB-70W and LB-12W/LB-72W

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

EMS: EN61326-1

•

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.

Aperture

[The above figure shows the appearance
of the LB-12(W).]

5

PART NAMES

Sensor head

LB-11(W) (Long-range)
LB-12(W)(High-resolution)

LASER ON alarm/
STABILITY LED
indicator

• indicates the
measuring range by
changing colors.

• indicates, by
changing colors,
when the light
quantity exceeds or
falls below a specific
limit . (See p.4.)

Sensor cable
(length: 2 m)

Made of high-tension
copper wire that retains
high flexibility.
[LB-11(W)]

Connector

Laser-emitting
portion

Laser beam
shield cover

(See p.4.)

Controller

LB-70(W)(long-range)
LB-72(W)(high-resolution)

O-ADJ adjuster trimmer

Adjusts the reference
voltage (zero point of the
analog output voltage) to
any point within the
measuring range.

SPAN adjuster trimmer

Adjusts the inclination of the
output voltage curve.

Sensitivity selector switch

In addition to BLACK or
WHITE settings, there is an
automatic gain circuit that
increases the sensitivity by
reducing the effect of the
color and material of
objects.

Response speed
selector switch

Selects one of three
response speeds:

0.15 ms, 2 ms and 60 ms [LB-72(W)],

0.7 ms, 20 ms, and 500 ms [LB-70(W)].

STABILITY LED
indicator

Indicates the measuring
range by changing colors.
Indicates, by changing
colors, when the light
quantity exceeds or falls
below a specific limit.

LASER ON alarm LED
indicator (See p.4.)

Key-operated switch
(see p.4.)

Laser emission
remote control
terminals

(See p.4.)

I/O cable (length: 2 m)

(The above figure shows the appearance of the LB-72(W).)

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