Keyence LV User Manual

1

General Purpose Digital Laser Sensor

LV Series

Instruction Manual

Specifications of the laser diode change depending on the model.
Refer to the tables below.

Laser safety precautions

Sensor head

Wavelength

Maximum output

FDA class

IEC class

650 nm

3 mW

II

2

I

1

785 nm

2.5 mW

LV-H32, H37, H42, H52, H62, H67

H47, H35, H64, H65, H100, H300

LV-H41, H51

Safety consideration

•

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

• The LV series product uses a laser diode as a light source.

Follow the safety precautions below to ensure operator safety:

• Operate the LV Series only according to the procedures described in this instruction
manual.
Otherwise, injury may occur due to exposure to the laser beam.

• Do not disassemble the sensor head.
Laser emission from the LV Series is not automatically stopped if the sensor head is
disassembled. If you disassemble the sensor head for inspection or repair, you may be
exposed to the laser beam. If the LV Series malfunctions, contact KEYENCE
immediately.

•Do not look directly at the laser beam.
Looking directly at the laser beam may result in serious eye injury.

• Protective enclosure
It is recommended that you install a protective enclosure around the sensor head to
prevent any person from getting near the sensor head during operation.

• Protective goggles
It is recommended that you wear protective goggles when using the LV Series.

•Stop laser emissions before cleaning the laser emission port.
Failure to stop the laser emission may expose eyes or skin to the laser beam.

• Check the laser beam path.
To prevent exposure to the laser beam due to specular or diffuse reflection, install a
screen which offers the appropriate reflectance and temperature characteristics to
interrupt the reflected laser beam. Do not install the LV Series in such a way that the
laser beam passes at eye height.

Label location

Warning labels are attached to the sensor head, as shown below.

¡LV-H32

¡LV-H42 ¡LV-H52

¡

Laser CLASS II warning labels(FDA CLASS II)

¡Aperture label

¡Protective housing label

LASER RADIATION

­DO NOT STARE INTO BEAM.
SEMICONDUCTOR LASER
MAXIMUM OUTPUT
PULSE DURATION
CLASS II LASER PRODUCT

650nm

3mW

3.5 s

CAUTIONTION

THIS PRODUCT COMPLIES WITH
21 CFR 1040.10 AND 1040.11

LASER RADIATION

­DO NOT STARE INTO BEAM.
SEMICONDUCTOR LASER
MAXIMUM OUTPUT
PULSE DURATION
CLASS II LASER PRODUCT

650nm

3mW

3.5 s

CAUTIONTION

1-3-14,Higashi-Nakajima,Higashi

-Yodogawa-ku,Osaka,533-8555,JAPAN

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Aperture
label

Aperture

AVOID EXPOSURE

LASER RADIATION IS EMITTED

FROM THIS APERTURE.

CAUTION

LASER RADIATION WHEN OPEN.

DO NOT STARE INTO BEAM.

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Aperture

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label

Protect
housing
label

Aperture

¡IEC CLASS 2

LASERSTRAHLUNG

NICHT IN DEN STRAHL BLICKEN
Wellenlänge

Maximalen Leistung
Impulsdauer

650nm

3mW

3.5µs

LASER KLASSE 2

nach Entwurf DIN EN 60825-1 1998-01

VORS I CH T
Laserstrahlung wenn
Abdeckung geöffnet.
Nicht in den Strahl blicken.

RAYONNEMENT LASER

NE PAS REGARDER DANS LE FAISCEAU

Longueur d´onde èmise
Puissance maximale
Durèe de l´impulsion

650nm

3mW

3.5µs

APPAREIL À LASER DE CLASSE 2

conforme à CEI 60825-1 1998-01

ATTE NTION

Rayonnement laser en cas
d´ouverture.
Ne pas regarder dans le
faisceau.

LASER RADIATION

DO NOT STARE INTO BEAM

Wavelength
Maximum output
Pulse duration

650nm

3mW

3.5µs

CLASS 2 LASER PRODUCT

in conformity to IEC 60825-1 1998-01

CAUTION
Laser radiation when open.
Do not stare into beam.

The FDA warning label has already
been stuck.

LV-H32 only

LV-H32 only

LV-H32 only

Laser ON alarm indicator

The laser ON alarm indicator will start flashing after power is turned on. The lamp will
remain ON for as long as the laser light is emitting. This alarm indicator can be seen even
when wearing protective goggles.

Laser emission stop input (LV-21A/21AP/51M/51MP/11A)

Laser emission can be stopped by short-circuiting
between the purple and blue (GND) wires when LV-21A,
LV-51M or LV-11A used. When LV-21AP or 51MP is used,
short-circuit between the purple and brown (12 to 24 V
DC) wires to stop laser emission.

Safety features





LASER
ON

PH

A
B

BH

MODE SET

%

Laser ON alarm indicator

LV-21A/11A/51M

¡LV-H35/H62/H67 ¡LV-H64/H65

¡LV-H100 (Transmitter side)

¡LV-H300 (Transmitter side)

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label

Aperture

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Aperture
label

Aperture

¡LV-H37/H47

96M0994

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

Aperture
label

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Laser CLASS II warning label

Laser CLASS II warning label

Laser CLASS II warning label

Laser CLASS II
warning label

Aperture

Aperture
label

Aperture

Aperture
label

Laser CLASS II
warning label

•

This is the product for detecting the target object. Do not use it in the safety circuit such as the
human body protection circuit.

•

This product does not have the explosion-proof construction Do not use it in the inflammable
atmosphere such as atmosphere gas, liquid or dust.

Warning labels

¡DIN Klasse 2

¡IEC (French) CLASS 2

Safety Precautions

5 V DC

Purple

Main circuit

(Short circuit current 1 mA max.)

Blue

Warning

Warning

Warning

When A, which is closer to the amplifier, is ON, the monitor displays
the excess gain of output A. When B is ON, the monitor displays the
excess gain of output B.

2

Amplifier

Part Names

LV-H51/H52

LV-H32

Adjust the beam spot size by
turning the focus ring. After
completing the adjustment, fix by
turning the focus lock screw.

LV-H41/H42

Sensor head

Transmitter

Receiver

Transmitter

Receiver

Focus lock

Focus ring

Slit for sensor head (Option for LV-H41/H42/H47/H51/H52)

If detection becomes unstable (light cannot be "steadily
received" or "steadily interrupted") due to a change in the
surroundings or the target, or for any other reason, readjust
the sensitivity.

Bar Graph LED monitor

(Interlocked with amplifier)

Bar LED monitor (sensor head)

The indicator turns on according
to the difference between the
received light intensity and the
setting value. The current level
of detection stability can be
determined from this difference.

Light is steadily
received

Setting value

Light is steadily
interrupted

+10%

−

-10%−

LV-H37/H47

LV-H300

LV-H100

LV-H35/H62/H67

LV-H64/H65

Transmitter side (T)

Red

Transmitter

Gray cable

Receiver side (R)

Blue

Receiver

Black cable

Transmitter side (T)

Red

Transmitter

Gray cable

Receiver side (R)

Blue

Receiver

Black cable

PH

A
B

BH

MODE SET

%

15%– 10%– 5%–

-5%–

-10%– -15%–

S

M

Bar LED monitor

Displaying excess gain

Calibration indicator

Peak hold display indicator

Output B
indicator

Channel
indicator

Setting monitor

• Displaying
setting values

• Displaying
settings

UP/DOWN
button

• Changing
setting values

• Selecting
between
various settings

Excess gain
indicator

SET button

Set up sensitivity

MODE button

• Switching displays

• Switching channels

• Displaying various settings

Received light intensity monitor

• Displaying received light
intensity

• Displaying excess gain

• Displaying the hold value

Setting

value

Bar LED Monitor

Light is
steadily

received

Light is

irregularly

received

Light is

irregularly

interrupted

Light is
steadily

interrupted

The current value of received light intensity
is displayed relative to the setting value,
within the range -15% to +15%.

Detection is generally stable when the
received light intensity is at least ±10%
different to the setting value, which is
represented by the center bar of the
LED monitor.

NOTENOTE

The illustration shows an example
of a received light intensity of +5%.

Bottom hold
display indicator

Laser ON
alarm
indicator

Output
button

Output A
indicator

Use in accordance with the distance and target.

¡

Attaching the slit

Attach the slit to the transmitter

¡

Removing the slit

Remove the slit by lifting up the
pin on the slit with a
screwdriver.

¡

LV-H41/H42

¡

LV-H51/H52

¡

LV-H47

Transmitter, Receiver



Transmitter, Receiver

Display excess
gain on Bar LED monitor

L

O

C

K

Transmitter

Receiver

Transmitter

Receiver

3

Accessories

Amplifier

Sensor head

LV-H32

LV-H41/H42

LV-H51/H52

Amplifier Mounting bracket

（LV-21A/21AP/51M/51MP/

11A only）

End unit

（LV-22A/22AP/52/52P

only）

Plastic driver

Mounting bracket

Slit (black, gray) Mounting bracket

L

O

C

K

Slit

Mounting bracket
main body
Board nut
M3 x 18 screw:2

Mounting bracket
main body
Board nut
M3 x 18 screw:2

LV-H37

Magnifying glass Mounting bracket

Mounting bracket
main body
Board nut
M3 x 18 screw:2

LV-H62

Reflector Mounting bracket

Mounting bracket
main body
Board nut
M3 x 18 screw:2

LV-H67

Reflector Mounting bracket

Mounting bracket
main body
Board nut
M3 x 18 screw:2

LV-H47

Slit (black, gray) Mounting bracket

Mounting bracket
main body
Board nut
M3 x 18 screw:2

LV-H35

LV-H64/H65

Mounting bracket

Mounting bracket
main body
Board nut
M3 x 18 screw:2

Mounting bracketReflector

Mounting bracket
main body
Board nut
M3 x 18 screw:2

Input/Output Circuit Diagram

¡LV-11A/21A/51M

Blue

Purple(Laser radiation interruption input)

Brown

12 to 24 V DC

5 to 40 V DC

5 to 40 V DC

0 V DC

Pink(External tuning input)*

White

(Control output A)

Black

Main circuit

Overcurrent

protection circuit

Load

Load

(Control output B)

¡LV-22A/52

White

(Control
output A)

Black

5 to 40 V DC

5 to 40 V DC

Main circuit

Overcurrent

protection circuit

Load

Load

(Control
output B)

¡

Laser radiation interruption
(Main unit only)
External tuning input circuit
diagram

¡Analog output circuit

diagram for monitor
(LV-51M/51MP)

(Short circuit current
1 mA max.)

Blue

Purple or Pink

5 V DC

Main circuit

¡LV-21AP/51MP





Blue

Purple

Brown

12 to 24 V DC

0 V DC

Pink*

White

(Control output A)

Black

Main circuit

Overcurrent

protection circuit

Load

Load

(Control output B)

(Laser radiation interruption input)

(External tuning input)

¡LV-22AP/52P

White

(Control
output A)

Black

12 to 24V DC

Main circuit

Overcurrent

protection circuit

Load

Load

(Control
output B)

LV-21AP/51MP

LV-21A/11A/51M

(Short circuit current
2 mA max.)

Brown

Purple or Pink

12 to 24 V DC

Main circuit

0 V

Main circuit

Protection

circuit

Orange

Blue

Output for
monitor
(1 to 4 V)

LV-H300

LV-H100

Transmitter side (T)

Gray cable

Receiver side (R)

Black cable

Transmitter side (T)

Gray cable

Receiver side (R)

Black cable

* LV-51M (monitor output) only is orange.

* LV-51MP (monitor output) only is orange.

4

Mounting and detaching amplifiers to and from
the DIN rail mounting bracket

Hook the claw on the rear of the amplifier onto the mounting bracket
of the DIN rail, then hook the front claw on the bracket while pressing
the amplifier forward. To detach the amplifier, unhook the front claw
by simultaneously lifting and pushing the amplifier forward.

Mounting Detaching Side mounting

Mounting additional amplifiers

The number of expansion units that can be mounted to the side of
main unit (LV-11A/21A/51M) is as shown below.

Remove the protective cover on the
side of the amplifier.

Mount expansion units one by one to
the DIN rail.

Slide one expansion unit toward the
main unit or other unit. Align the front
claws of the units and push them
together until you hear a click.

Secure the units together by pushing
the end units (included with the
expansion unit) from both sides.

1

2

3

4

* The sticker on the right is included

with the expansion unit. Attach this
sticker near the amplifier.

Mounting Amplifiers

Removethe
protectivecover

Align the claws.

End unit. (incl. with
expansion units)

Main unit

Expansion
units

Up to 14 expansion units can be added.

• When connecting several amplifiers, always use a DIN rail
and end unit.

•

Take care to turn the power off before connecting/disconnecting
amplifiers.

• Do not remove the protective cover from the expansion
connector of the outermost unit.

• Do not detach multiple units from the DIN rail while they are
still connected to each other.

• If several units are connected, check that the ambient
temperature is appropriate. “Specifications” (page 8).

Important

Detaching amplifiers

Take off the end unit.

Slide the expansion units. Remove them one by one from the DIN
rail.

1
2

Process the end of the cable as shown below.

1

To shorten the sensor head cable

Tilt the top in the direction of the arrow on the left side of the top,
then open the connector.

2

Insert the cable with the shield wire bent at 90°, then bend the
shield wire in the direction of the arrow along the groove. Match
the color of the connector to the color of the shield wire.

3

Red

White

Close the connector, and lock it by pushing down the top.

4

Using nippers or a similar tool, trim the wires sticking out from the
connectors.

5

Mounting the reflection type

Insert the connector into the amplifier and lock it with the lever.
Pass the cable underneath the lever and close the dust cover.

1

Mounting the transmission type

Insert the two connectors into the amplifier unit and lock them
with the lever. Insert the transmitter side connector (with gray
cable) into the light gray lever side, and insert the receiver side
connector (with black cable) into the dark gray lever side. Route
the cable underneath the lever and close the dust cover.

1

PH

A
B

BH

M

%

Receiver side
(black cable)

Transmitter side
(gray cable)

Shield wire

Cable
core

90°

10 mm min.

Mounting the Senser Head

Up to 7

LV-22A, LV-52, AP-V42

Up to 14

FS-T2/M2/V12/V22/PS-T2/ES-M2

5

Sensitivity Adjustment

MAX

MIN

Received light
intensity

Setting
value

Time

The setting value is
adjusted to the midpoint
of the difference in
received light intensity
when the target is
absent and present.

Automatic tuning

Pass a target through the optical
axis while pressing the button.

S

1

Confirm that the calibration
indicator (orange LED) and setting
monitor (green LED) are flashing.

2

Release the button.

S

3

PH

A
B

BH

MODE SET

%

Maximum sensitivity setting

For the reflection type sensor, adjust the sensitivity without using
target. For the transmission type sensor, adjust the sensitivity by
using target.

If the setting does not work well, perform the two-point tuning.

Received light
intensity

Setting
value

Time

The setting value is
adjusted to the
midpoint of the
difference in received
light intensity when the
target is absent and
present.

Two-point tuning

With no target in place, press the

button lightly.

S

1

Put a target in place and press the

button again lightly.

S

2

PH

A
B

BH

MODE SET

%

PH

A
B

BH

MODE SET

%

The setting value
is displayed.

PH

A
B

BH

MODE SET

%

The setting value
is displayed.

Received light
intensity

Setting
value

Time

The setting value is
adjusted to turn on the
sensor when the target
arrives at the place
where it should stop.

Positioning tuning

With no target in place, press the

button lightly (orange LED

lights up).

S

1

Place a target in the position where
it should stop.

2

Press the button for 3 seconds
or more until the calibration
indicator (orange LED) and setting
monitor (green LED) are flashing.

S

3

Differentiation Mode

(page 6)

Setting sensitivity

Output state

Received light intensity monitor

The received light intensity monitor displays the amount of
differentiation. Use hold mode switching with hold display ON.

D.ON

L.ON

N.C. output

N.O. output

N.C. output

N.O. output

UP edge DOWN edge

If you press the button accidentally while performing a
fine adjustment of your setting values, a sensitivity
calibration will start automatically and prevent you from
continuing your fine adjustment until the calibration is
completed. If this happens, press the button again to
cancel the setting and start your fine adjustment again.
The value may not change by 1 digit during fine-tuning
adjustments. This is not a malfunction.

S

S

Note

The values displayed on the calibration LED monitor can be
changed by pressing (to increase sensitivity) or (to decrease
sensitivity). This allows you to fine-tune your setting values.

Fine Adjustment of Setting Values

Selecting Display Modes

The display changes each time the MODE button is pressed.
The received light intensity/excess gain hold display appears only
after peak/bottom hold is selected in the hold mode.

M

Light intensity display

Excess gain

old display

When hold display

is selected

Display Peak

or Bottom

Excess gain display(%)

PH BH

%

PH BH

%

PH BH

%

PH BH

%

Light intensity

hold display

Press this button once.

M

Press this button once.

M

Press this button once.

M

Press this button once.

M

• Setting value display

Displays setting value.

• Received light intensity display

Displays received light intensity.

• Excess gain display

Shows the received light intensity as a percentage of the setting
value (setting value = 100%).
This display cannot be shown when the standard light intensity
display is selected.

The displayed value for excess gain is 0 when the excess
gain is less than 1%.

Note

According to the directions on the
left, press the button for 3
seconds or more.

S

1

Confirm that the calibration
indicator (orange LED) and setting
monitor (green LED) are flashing.

2

Release the button.

S

3

For more information about hold display, refer to "Mode Setting" (p. 6).
You cannot select the excess gain display when the standard light intensity is set.

Quickly press once, to set sensitivity to its maximum value.
Perform fine-tuning adjustments using or , or refer to the
details on hold display below.

S

Reference:

Differentiation Mode Detection (UP/DOWN edge)
Detects only sudden changes in received light intensity within a certain time interval.

• UP edge detection: Output is turned ON when light intensity increases by
more than the setting value within a fixed time interval.

• DOWN edge detection: Output is turned ON when light intensity decreases by
more than the setting value within a fixed time interval.

To achieve stable detection in differentiation mode, changes in received light
intensity resulting from the presence or absence of the target must be greater than
the changes in received light intensity resulting from dust or vibration.

Reflection type

No target

Transmission type

PH

BH

%

A
B

Target is used.

PH

A
B

BH

%

MODE SET

MODE SET

MODE SET

PH

BH

%

A
B

MODE SET

PH

BH

%

A
B

6

If you press the button for three seconds or more when either or is displayed, you can display the values of various settings.
Each setting can be adjusted separately for channel A and channel B.

Received light

intensity

Light intensity

hold display

M

Reference:

When the button is pressed for 3 seconds or more during mode setting, the display returns to the received light intensity display.

M

NOTE

A
B

2.

Selecting power mode

1. Initial display

*LV-51M/52/51MP/52P only

3.

Selecting detection method

• FINE

• TURBO

• SUPER

•

STANDARD 1

•

STANDARD 2

•

DIFFERENTIATION

(UP edge detection)

•

DIFFERENTIATION

(DOWN edge detection)

Set to this mode for detecting
high-speed targets.

Set to this mode for
regular detection work.

Set to this mode when
there is insufficient light.

Set this mode for regular
detection work.

Use this mode to increase
hysteresis.

Detects the UP edge of
received light change.

Detect the DOWN edge
received light change.

4.

Selecting display shift

5.

Selecting hold mode

1-1. Setting the standard

light intensity

1-2. Registering the standard

light intensity

• NO HOLD

Display is not held

Peak value is held
on the display

Set to this mode for
regular detection work.

Use for output OFF
delay

Use for output ON
delay

Use for one-shot output

Minimum value is held
on the display

• PEAK HOLD

• BOTTOM HOLD

•

NO TIMER

•

OFF DELAY

•

ON DELAY

•

ONE SHOT

6.

Selecting timer mode

Selecting no timer

7. Timer setting

Received light
intensity after shift

Amount of shift

PH

A
B

BH

MODE SET

%

2.

Switching power mode:(

for both outputs A and B )

3. Switching detection mode:(Skipped during the

standard light intensity setting is in progress.)

4. Switching display shift

5. Hold mode switching

6. Switching timer mode

7. Timer setting

Min. 1 ms to max. 9999 ms

Select a power mode to use for or .

Select a detection mode to use for or .

Select a hold mode to use for or .

Select a timer mode to use for or .

Set the timer for or .

Be sure to adjust the sensitivity again after switching
POWER mode.

Differentiation Mode Detection (page 5)

Setting values will also shift.

By pressing

once, the received light intensity
display will shift to a value of 0. Also, fine adjustments
of display shift can be done using or .

*To set the shift value to 0, press and
together.

A
B

1-3. Changing the number

of display digits

A
B

1-3. Changing the number of display digits

:(

for both outputs A and B )

PH

A
B

BH

MODE SET

%

PH

A
B

BH

MODE SET

%

PH

A
B

BH

MODE SET

%

PH

A
B

BH

MODE SET

%

PH

A
B

BH

MODE SET

%

PH

A
B

BH

MODE SET

%

PH

A
B

BH

MODE SET

%

PH

A
B

BH

MODE SET

%

PH

A
B

BH

MODE SET

%

PH

A
B

BH

MODE SET

%

PH

A
B

BH

MODE SET

%

PH

A
B

BH

MODE SET

%

PH

A
B

BH

MODE SET

%

PH

A
B

BH

MODE SET

%

PH

A
B

BH

MODE SET

%

PH

A
B

BH

MODE SET

%

PH

A
B

BH

MODE SET

%

PH

A
B

BH

MODE SET

%

PH

A
B

BH

MODE SET

%

PH

A
B

BH

MODE SET

%

PH

A
B

BH

MODE SET

%

PH

A
B

BH

MODE SET

%

PH BH

PH BH

PH BH

PH

A
B

BH

MODE SET

%

M

Press for three seconds or more.

M

Press once lightly.

M

Press once lightly.

M

Press once lightly.

M

Press once lightly.

M

Press once lightly.

M

Press once lightly.

M

Press once lightly.

M

Press once lightly.

M

Press once lightly.

1-1. Setting the standard light intensity

:(

for both

outputs A and B )

1) 2)

State

A-5

Displays the received

light intensity

b-5

Displays the interrupted

light intensity

Receive all light

500

0

Interrupt half light

250 250

Interrupt all light

0

500

1) A: Displays the data in accordance with
the received light intensity

b: Displays the data in accordance with

the interrupted light intensity

2) 5: Standard light intensity is set to 500.

10: Standard light intensity is set to 1000.
20: Standard light intensity is set to 2000.
30: Standard light intensity is set to 3000.

Ex. When the standard light intensity is 500.

The last digit of digital display can be set to
non-display.

To "2. Selecting power mode"

PH

A
B

BH

MODE SET

%

PH

A
B

BH

MODE SET

%

PH

A
B

BH

MODE SET

%

Press the button in the state that no target is set.
When the SET indication flashes quickly, the setting
is completed.

S

Select a standard light intensity by using or .
When you select OFF and press once lightly,
the menu moves to 2.

M

PH

A
B

BH

MODE SET

%

PH

A
B

BH

MODE SET

%

Select a value to be displayed in the digital display
(green) by using or .

Ex. When A-5 is selected in 1-1

PH

A
B

BH

MODE SET

%

A
B

1-2. Registering the standard light intensity

:(

for both outputs A and B )

S

Mode Setting

*It is possible to perform detection work while changing mode settings.

To do this, switch the monitor to display received light intensity.

When the standard light intensity is set, the detection
mode is fixed to "Standard Detection 1"

Note

7

Initializing Settings (Initial Reset)

All settings can be reset to their original values (factory defaults).
This can be done only when the operation button is not locked.

In the state of the received light intensity display, press five
times, while pressing .

1

2

When is displayed on the digital LED monitor, press
once.

(When is pressed here instead of , the monitor returns to
the received light intensity display without being reset)

is displayed on the setting monitor for three seconds and
then is displayed. Initialization is now complete. The
received light intensity display will appear on the monitor again.

3

Power mode*2

Detection methods

Display shift

Hold mode

Timer mode

Timer

Output setting

TURBO

Standard output 1

Shift value: 0

No hold display

No timer

D. ON: 46, L. ON: 50 (52 for LV-H62)

10 ms

Output A / Output B

OFF

Standard light intensity setting*1

PH

A
B

BH

MODE SET

%

PH

A
B

BH

MODE SET

%

Initial settings

PH

A
B

BH

MODE SET

%

PH

A
B

BH

MODE SET

%

*1: LV-51M/52/51MP/52P only
*2: For LV-51M/52/51MP/52P, FINE only

Problem description Countermeasures

Error message

The sensor head is not connected,
sensor is inserted in a wrong
connector, or the sensor head cable
has an open circuit.

Excessive current in output
cable.

Check for an open circuit in the head
cable, and that the sensor is connected
to the correct connector.

Check the load and adjust to
within rated values.

Data error

Perform the initial reset.

Error Messages

If any of the following errors appear on the LED display, check the
amplifier or sensor unit according to the countermeasures listed below.

If an error message other than the above is displayed, contact KEYENCE.

The LV Series can perform two different types of sensitivity settings.

Press or quickly
while holding down .

1

Channel indicator for
set up mode starts
flashing.

2

Release .

3

Selecting Channels

PH

A
B

BH

MODE SET

%

Three types of output modes can be selected.

Selecting Output Mode

PH

A
B

BH

MODE SET

%

Switch

D.ON

(Output ON when light is received)

(Output ON when

light is received)

(Output ON when

light is interrupted)

(Output ON when light is interrupted)

Output B

L.ON

L.ON

D.ON

Output A

Outputswitches

Oneofthetwochannelindicators
willstartflashing.

Adjusting Sensitivity via External Signals (External Tuning)

Lock the operation button

1

Connect the pink cable to a switch or PLC.

2

Making a short circuit between the pink cable and blue cable has
the same effect as pressing .

3

Brown

Blue

+V

0V

Pink

Brown

Pink

Blue

+V

0V

PH

A
B

BH

MODE SET

%

LV-21A/11A LV-21AP

The operation button can be locked to prevent anyone accidentally
touching the operation button and changing settings.

This is the function of the LV-11A/21A/21AP. You cannot use this
function with LV-51M/51MP.

When Key Lock is on, all settings except selecting display, selecting
output and display settings remain disabled until Key Lock is released.

Press or for three seconds or more while pressing .

will start flashing on the display.

Turning on Key Lock

Releasing Key Lock

Press or for three seconds or more while pressing .

will start flashing on the display.

Key Lock

SMS

S

The value for the timer is only effective when timer mode is
set to a setting other than “NO TIMER (OFF).”

Note

Minimum input time is 20 ms.

Note

The operation button must be locked to perform external
tuning.

Important

While tuning sensitivity or setting modes such as power
mode, it is not possible to select channels.

Note

M

M

M

M

S

8

Caution on usage of QL (LV-20A only)

Interruption of Laser Radiation

A short circuit between the purple and blue conductors will cause
laser radiation to be interrupted (min. input time: 20 ms).

(Short circuit current 1 mA max.)

5 V DC

Main circuit

Purple

Brown

12-24 V DC

Main circuit

(Short circuit current 2 mA max.)

Purple

Brown

LV-11A/21A/51M

LV-21AP/51MP

Mutual Interference Suppression

The LV Series is equipped with a mutual interference suppression
function. Please note, however, that this mutual interference suppression
function will not work when two main units are used together.

(1)

For use with FS-R0 as main unit. If you wish to use the QL-R01 as the main unit, contact KEYENCE.

(2)

No control output cable for LV-20A

(3)

The power for LV-20A/22A/22AP/52/52AP is supplied from the main unit.

(4)

With additional units connected, the allowable ambient temperature range varies as follows.

2 to 5 units connected: -10 to +50°C (14 to 122°F)
6 to 7 units connected: -10 to +45°C (14 to 113°F)
To connect additional units they must be mounted on a DIN rail (metal DIN rail). Make sure that output current is 20 mA. max.

Note also that the expansion unit cannot be used as it is.

Model

Supported senser head

FDA class

IEC class(JIS)

class 2 class 2class 1

Main unit

Main unit/expansion unit

Response time

FINE: 80

µ

s

TURBO: 500 µs

SUPER: 4 ms

280 µs to 4.7 ms(1)

FINE: 500 µs

TURBO: 2 ms

SUPER: 8 ms

FINE : 80 µs

TURBO: 500 µs

SUPER: 4 ms

Operation mode LIGHT-ON/DARK-ON (switch selectable)

Output display x 2, Digital LED monitor (light intensity monitor, setting monitor), Bar LED monitor, Laser ON alarm indicator

Indicators

Detection modes

Timer function

Laser emission stop input

External tuning input

Analog output for monitor

Protection circuit

1 to 4 V voltage output, 1 to 4 V across load resistance of at least 20 kΩ for FINE indication 0 to 3000 (LV-51M/51MP only)

Reverse-polarity protection, overcurrent protection, surge absorber

DC 12 to 24V ±10% max., Ripple (P–P) 10% max.

(3)

1.5 W (12 V:125 mA, 24 V:62.5 mA)

Control output

(2)

STANDARD 1, STANDARD 2, UP edge, DOWN edge, separate settings for ch A/B

(Except the mode in which the standard light intensity setting is in progress)

OFF DELAY/ON DELAY/ONE SHOT, separate settings for ch A/B, timer 1 to 9999 ms variable

Non-voltage input, stop during laser radiation, input time: at least 20 ms.(Main unit only)

Non-voltage input, input time: at least 20 ms (LV-51M/51MP do not support this item)

NPN output

PNP output

NPN output

PNP output

Rating

Power voltage

Power consumption

(current consumption)

Environmental

resistance

Ambient temperature

Relative humidity

Vibration resistance

-10 to +55 °C (14 to 131 °F), No freezing

(4)

35 to 85%, No condensation

10 to 55 Hz, 1.5 mm double-amplitude in X, Y, and Z direction: 2 hours per axis

Materials Main body & cover: Polycarbonate

Weight (incl. 2-m cable)

NPN open-collector x 2 ch, max. 100 mA (40 V max.), residual voltage 1 max.

PNP open-collector x 2 ch, max. 100 mA (30 V max.), residual voltage 1 max.

LV-21A

LV-21AP

LV-22A

LV-22AP

LV-20A

_

Main unit

Expansion unit (1 line) Expansion unit (0 line)

LV-11A

_

LV-H41/H51 LV-H100/H300

LV-51M

LV-51MP

LV-52

Approx. 120 g Approx. 75 g Approx. 35 g Approx. 120 g Approx. 120 g

Approx. 75 g

LV-52P

Main unit

Expansion unit (1 line)

LV-H32/H35/H37/H42/H47/H52/H62/H64/H65/H67

class

class class

Specifications

Amplifier

When additional sensor head units are installed, mutual
interference suppression allows the units to be positioned
close together. The number of units with which mutual
interference suppression will work depends on the selected
power mode.

* Total (main unit plus expansion units)

Note

This function is available only with the main unit.
Even when expansion units (LV-22A/22AP/52/52P) are
connected, laser radiation stops only from the main unit.

Note

• When you want to monitor the received light intensity in a PLC
using the KEYENCE QL-R01, note that the indication will be
limited in the range of 0 to 4095, and that the threshold value
that can be written in LV using the QL-R01 is up to 4095
(common to all of FINE, TURBO and SUPER TURBO).

• Monitoring of the received light intensity and writing of the
threshold value using QL-R01 are possible in the LV-20A only.

• Up to eight expansion units can be mounted on the QL-R01
provided all the expansion units are the LV-20A. Refer to
"Mounting additional amplifier" (page 4) and the instruction
manual for the QL-R01.

• LV requires two QL channels because a single LV unit has two
output channels.

• Restrictions due to compliance with EMC Directive:
When linking four LVs or more to the QL-R01, install a ferrite
core to the root of the QL-R01 cable.

Important

No. of units free

FINE

Not possible

TURBO

2 *

SUPERPower mode

4 *

9

Specifications

Materials

Model

Light source

Supported amplifier unit

FDA class

IEC class(JIS)

LV-H32 LV-H35 LV-H37 LV-H42 LV-H47 LV-H52

Visible red semiconductor laser, Wavelength: 650 nm, 3 mW max.

LV-21A / 22A / 20A / 21AP / 22AP

class II

class 2

Laser ON alarm indicator: green LED, Lebel indicator: green x 2, red x 1 (lebel indicator displays excess gain from 90 to 110%)

Incandescent light: 10,000 lux max. Sunlight: 20,000 lux max.

-10 to +55˚C (14 to 131˚F), No freezing

35 to 85%, No condensation

10 to 55 Hz, 1.5 mm double amplitude in X, Y and Z directions: 2 hours per direction

30 to 250 mm

30 to 500 mm

30 to 1000 mm

150 mm

300 mm

70±15 mm 55 to 85 mm

600 mm

250 mm

(Slit black: 150 mm)

(Slit gray: 100 mm)

15 to 120 mm

(Slit: 20 to 60 mm)

15 to 180 mm

(Slit: 20 to 80 mm)

approx. 55 gapprox. 45 g

500 mm

(Slit black: 300 mm)

(Slit gray: 200 mm)

1000 mm

(Slit black: 600 mm)

(Slit gray: 400 mm)

Detection distance max. 300 mm
Spot diameter: 0.8 mm max.

approx. ø2 mm

approx. ø50 µm

(distance 70 mm)

approx. 21 mm

(distance 70 mm)

Detection distance

35 mm

Area width: approx. 25 mm

(Slit: approx.9 mm)

Detection distance 150 mm

Area width: approx. 37mm

(Slit black:

approx. 19 mm)

(Slit gray:

approx. 7 mm)

Thickness: 1 mm max.

Detection
distance

Beam spot
shape

Environmental
resistance

FINE

TURBO

SUPER

Ambient
illumination

Ambient
temperature

Relative
humidity

Vibration
resistance

Indicator

Weight (incl. 2-m cable)

15 to 240 mm

(Slit: 20 to 100 mm)

Case

Accessories

Glass-reinforced resin

Lens (cover)

Transmitter: Acrylic

Receiver: Polyalylate

Transmitter: Glass

Receiver: Polyalylate

Acrylic

Polyalylate

Accessories

Polyalylate

Transmitter: Glass

Receiver: Polyalylate

_

Model

Light source

Supported amplifier unit

FDA class

IEC z )

LV-H62 LV-H67 LV-H64 LV-H65 LV-H41 LV-H51 LV-H100 LV-H300

Visible red semiconductor laser, Wavelength: 650 nm, 3 mW max.

LV-21A / 22A / 20A / 21AP / 22AP

classII

class2

LV-11A

classI

class1

Invisible infrared semiconductor laser

Wavelength: 785 nm, 2.5 mW max.

LV-51M / 52 / 51MP / 52P

classII

class2

Visible red semiconductor laser,

Wavelength: 650 nm, 3 mW max.

Incandescent light; 10,000 lux max. Sunlight: 20,000 lux max.

-10 to +55˚C (14 to 131˚F), No freezing

10 to 55 Hz, 1.5 mm double amplitude in X, Y and Z directions: 2 hours per direction

30 to 250 mm

30 to 500 mm

30 to 1000 mm

20 m

30 m

250 mm

(Slit black: 150 mm)

(Slit gray: 100 mm)

15 to 120 mm

(Slit: 20 to 60 mm)

15

to

180 mm

(Slit: 20 to 80 mm)

15

to

240 mm

(Slit: 20 to 100 mm)

2000 mm

(Detection width

10 mm)

2000 mm

(Detection width

30 mm)

Approx. 100 gApprox. 80 gApprox. 55 g

500 mm

(Slit black: 300 mm)

(Slit gray: 200 mm)

1000 mm

(Slit black: 600 mm)

(Slit gray: 400 mm)

100 mm

(When OP-51428 is

used: 150 mm)
10 to 150 mm

(When OP-51428 is

used: 10 to 250 mm)

100 to 200 mm

(When OP-51428 is

used: 150 to 350 mm)

100 to 500 mm

(When OP-51428 is

used: 100 to 700 mm)

200 to 850 mm

(When OP-51428 is

used: 300 to 1100 mm)

400 to 1200 mm

(When OP-51428 is

used: 600 to 1500 mm)

30m

(When OP-51428 is

used: 50 m)

approx. ø1.5 mm

(Distance 1 m

max)

Area width: 40 mm
(Distance 300 mm)

Area width: 50 mm
(Distance 100 mm)

Area width

approx. 12 mm

Area width

approx. 32 mm

Detection distance 35 mm

Area width: approx.

25 mm(Slit: approx. 9 mm)

<Typical>

20 m

approx.10x3 cm

30 m

approx.15x4 cm

Detection distance150 mm
Area width: approx. 38 mm
(Slit black: approx.19 mm)

(Slit gray: approx.7 mm)
Thickness: 1.3 mm max.

Detection
distance

Beam spot shape

FINE

TURBO

SUPER

Ambient
illumination

Ambient
temperatture

Vibration
resistance

Indicator

Weight(incl. 2-m cable)

Materials

Case Glass-reinforced resin

Lens (cover)

Acrylic PolyalylateNorbornene resin Transmitter: Glass, Receiver: Polyalylate

Accessories Reflector: Acrylic, Polycarbonate Slit: Polyacetal -

Approx. 45 g

Laser ON alarm indicator, Power indicator*: green LED, Lebel indicator: green x 2, red x 1 (lebel indicator displays excess gain from 90 to 110%)

* The power indicator is installed only in the receiver of the LV-H100/H300.

Environmental
resistance

Sensor head specifications1

Sensor head specifications 2

10

Hints on Correct Use

･

To extend the ampliffiler cable length, use a cable that has a cros­sectional area of at last aa 0.3 mm

2

. Limit the length of cable
extensions to 100 m. (For further information on connecting several
units contact KEYENCE)

･

Placing the amplifier cable together in the same conduit with power
lines or high voltage lines may cause detection errors due to
interference or sensor damage. For this reason, always isolate the
amplifier cable from these lines.

･

If using a commercial switching regulator, make sure to ground
both the frame ground terminal and ground terminal.

･

Do not use the LV Series outdoors, or in any location where
extraneous light can directly enter the light receiving surface.

･

At the maximum sensitivity setting, detection distance may vary
somewhat due to slight differences in the characteristics of indi­vidual units.

･

Improper wiring may cause the amplifier to become hot or alter
sensitivity. (Input/Output Circuit Diagram: page 7)

･

Do not use connectors for sensor head-to-amplifier connections
more than 100 times.

･

Displayed values may vary due to surrounding conditions (e.g.
temperature changes, dust)

Cautions on using the LV-H62/H67

･

Use FINE mode when there are any white or mirror-surfaced objects
near the sensor head.

･

When the output is unstable in standard 1 mode (Std),

change the detection mode to standard 2 (Std2).

Reflector

･

The values on the received light intensity display may vary depend­ing on the surface condition of the reflector.

•Use the exclusive bracket (optional LV-B101, LV-B102, LV-B301,
LV-B302) to mount the sensor. Adjust the light axis of the transmitter
and receiver in both the vertical and horizontal directions without
any target in the detection area. Then, mount the sensor while
maximizing the value displayed on the amplifier. (Adjust the light
axis so that the transmitter beam is at the center of the receiver
block)

•When mounting the sensor, mount the transmitter and receiver so
that their sides on which the indicator is mounted face the same
direction.

WARRANTIES (MUST ACCOMPANY THE PRODUCTS): KEYENCE,
at its sole option, will refund, repair or replace at no charge any
defective Products within 1year from the date of shipment. Unless
stated otherwise herein, the Products should not be used internally in
humans, for human transportation, as safety devices or fail-safe
systems. EXCEPT FOR THE FOREGOING, ALL EXPRESS, IMPLIED
AND STATUTORY WARRANTIES, INCLUDING WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NON-INFRINGEMENT OF PROPRIETARY RIGHTS, ARE EXPRESSLY
DISCLAIMED. KEYENCE SHALL NOT BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, CONSEQUENTIAL OR OTHER DAMAGES,
EVEN IF DAMAGES RESULT FROM THE USE OF THE PRODUCTS
IN ACCORDANCE WITH ANY SUGGESTIONS OR INFORMATION
PROVIDED BY KEYENCE. In some jurisdictions, some of the
foregoing warranty disclaimers or damage limitations may not apply.

Warranties

Cautions on Usage the LV-H100/H300

The side on which the indicator is mounted The side on which the indicator is mounted

The side on which the indicator is mounted

The side on which the indicator is mounted

KEYENCE CORPORATION

1-3-14, Higashi-Nakajima, Higashi-Yodogawa-ku,
Osaka, 533-8555, Japan
Phone: [phone] Fax: [phone]

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KEYENCE CORPORATION, 2003

0053-1 Printed in Japan

Specifications are subject to change without notice.