Keyence FS-V21RP, FS-V21, FS-V21R, FS-V21X, FS-V21G User Manual

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Fiber insertion sign

Max. 100mA

0 VDC

12 to 24 VDC

Control output

Brown

Blue

Black

Load

5 to 40 VDC

Photoelectric

sensor main circuit

Overcurrent

protection circuit

96M0746

3. Mounting Unit

DUAL DIGITAL FIBER
SENSOR

FS-V21/21G/21R(P)/21X

Instruction Manual

1. Safety Precautions

WARNING

• This product is used to detect targets. Do not apply the product to
safety circuits for human protection.

• This product is not of explosion-proof construction. Do not use the
products in places with flammable gas, liquid, or dust.

• This product is a sensor of DC power supply type. Do not apply AC
power. The product may explode or burn if 100 VAC or a higher volt­age is applied.

● DIN Track Mounting

1) As shown in the illustration, engage
the claw on the lower side of the
unit and the DIN rail, press the unit
in the direction shown by arrow ➀,
and move down the unit in the di­rection shown by arrow ➁.

2) When dismounting the unit, press
the unit in the direction shown by
arrow ➀ and move up the unit in
the direction shown by arrow ➂.

● Using Mounting Bracket (accessory)

• Attach the unit to the mounting
bracket, mount them together, and
secure them with two M3 screws
as shown in the illustration.

4. Connecting Fiber Unit

1) Open the dust cover in the di­rection shown by arrow ➀.

2) Move down the fiber lock lever
in the direction shown by arrow
➁.

3) Insert a fiber unit into the fiber
insertion holes to a length of the
fiber insertion sign (i.e., approxi­mately 14 mm).

4) Move up and return the fiber
lock lever in the direction shown
by the arrow ➃.

Check that all the accessories are ready before use.

• Accessories

Instruction manual (x 1) Mounting bracket (x 1)

2. Part Names

Operation indicator*

Digital monitor

Preset value (PV)
green indicator

Current value (CV)
red indicator

Dust cover

Fiber lock lever

Set button

Manual button

Mode button

Expansion
protective cover

Expansion

connector

Output selector

Cable

Note:If a thin fiber unit is used, an adapter provided with the thin fiber unit

will be required.
Unless the right adapter is connected, the thin fiber unit will not
detect targets correctly.

Cable outer dia. Adapter Appearance

ø1.3 Adapter A

ø1.0 Adapter B

• To connect the coaxial reflective type fiber unit to the amplifier, connect
the single-core fiber to the transmitter side, and connect the multiple­core fiber to the receiver side.

Transmitter

Single-core fiber

Multi-core fiber

Receiver

5. I/O Cricuit

Refer to the following I/O circuit diagram when connecting the unit to pe­ripheral devices.

● FS-V21/21G/21R/21X ● FS-V21RP

Brown

Max. 100mA

Black

Load

Overcurrent

protection circuit

Photoelectric

sensor main circuit

Control output

Blue

12 to 24 VDC

0 VDC

* The operation indicator of the FS-V21X (infrared model) will not be lit.

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6. Making Sensitivity Settings

● Full Auto Calibration

In this mode, the PV will be set to the mean value of the maximum and
minimum incident values obtained within a certain period.
Use this mode to detect moving workpieces.

1) Press the set button for a minimum of three seconds while the target
workpiece is passing the sensing area of the fiber unit.

• While the set button is pressed, the sensitivity of the sensor will

be set according to the incident values.

Workpiece

3 s min.

The display will
flash when the
settings are
completed.

• When the setting is finished, the digital monitor will display the PV

in green.

PV (green)

CV (red)

● Two-point Calibration

In this mode, the PV used will be the mean value of two sensing values
obtained with and without a workpiece.

1) Press the set button for a moment without the workpiece in the sens­ing area (i.e., in front of the fiber unit).

Workpiece

● Manual Calibration

In this mode, make manual PV settings.

PV

The PV value decreases by pressing
this side of the manual button.

The PV value increases
by pressing this side of
the manual button.

● Positioning Calibration

In this mode, a workpiece will be detected when the front edge of the
workpiece has reached a preset position.

1) Press the set button for a moment without the workpiece in the sens­ing area (i.e., in front of the fiber unit).

Workpiece

The display will be lit
when the workpiece
is detected.

2) Locate the front edge of the workpiece in the sensing area. Then
press the set button for a minimum of three seconds.

Workpiece

Front edge

3 s min.

The display will flash
for a moment when
the setting is
finished. Then the
PV will be displayed.

The display will be lit
when the workpiece
is detected.

2) Locate the workpiece in the sensing area (i.e., in front of the fiber unit).
Then press the set button for a moment.

Workpiece

The PV will appear when
the settings are completed.

* If there is extremely little difference in sensitivity between the sens-

ing values, the display will flash on completion of tuning.

● Maximum Sensitivity Setting

If the sensing performance of the sensor drops due to dust or dirt, set
the sensitivity of the sensor to maximum.

1) Press the set button without a workpiece if the fiber unit is a reflec-

tive model. Press the set button with a workpiece if the fiber unit is a
through-beam model. In both cases, press the set button for a mini­mum of three seconds.

“Reflective model”

“Through-beam model”

3 s min.

The display will flash
for a moment when
the setting is finished.
Then the PV will be
displayed.

* If the sensing distance is insufficient, make sensitivity settings in the

sensor in two-point tuning mode.

7. Selecting Output

Either light-ON mode or dark-ON mode is selectable.

Press the output selector.

The display indicates that
the sensor is in dark-ON
mode. The CV will be
displayed if no buttons are

Press the manual button
within five seconds after
pressing the output

selector ➀.
operated for approximately
five seconds.

• Take the same steps to set the sensor to light-ON mode again.

8. User-friendly Functions

● Access Mode Selection

Two modes are available to the display of values and menu items.

EASY Only basic functions are displayed.

FULL All available functions are displayed.

Press 3 s min.

Completion
of selection

Press 3 s min.

• The mode is set to EASY before shipping.

Select

➁

EASY

FULL

2

● Display Selection (Access Mode: EASY)

PV CV

Press

Excess

•The CV is displayed in

CV

gain

percent based on the
PV.

Press

Output

status

•

The current value will be
displayed if no keys are operated
for approximately 30 s.

•

If the timer function is set, the
output status with power mode
and the timer mode with set time
will be displayed alternately.

● Display Selection (Access Mode: FULL)

PV CV

Press

Press

Press

Power

mode status

● Menu Selection (Access Mode: FULL)

Access
mode
selection

Power
mode
selection

Timer
function
setting

Press the
mode button 3 s min

Press

Select

Press

Select

Press

Other than

FINE
TURBO
SUPER TURBO
ULTRA TURBO

HIGH SPEED
HIGH RESO-

LUTION

Normal operation use

Used if the sensing distance is insufficient
while the sensor is in fine mode.

Used if the sensing environment is
bad due to dust or other obstacles.

Used if the incident is insufficient while
the sensor is in SUPER TURBO mode.

Used to detect sensing objects
moving at high speed.

Used to detect delicate differences
within a short sensing distance.

Timer OFF (for normal operation use)
OFF-delay timer
ON-delay timer
One-shot timer

Excess

gain

LED bar
indicator

CV

CV

Press

Output

status

Peak

excess

gain

Press

Peak value Bottom value

Power

mode status

Bottom
excess

gain

● Menu Selection (Access Mode: EASY)

Press the
mode button 3 s min

Access mode
selection

Press

Power mode
selection

Press manual

Press

Press

button to select

Timer function
setting

Press manual
button to select

Press

Press

Normal
operation use

FINE

Used if the sensing
distance is insufficient

TURBO

while the sensor is in
fine mode.

Used if the sensing
environment is bad

SUPER

due to dust or other

TURBO

obstacles.

Timer OFF
normal operation use)

OFF-delay timer
ON-delay timer
One-shot timer

(for

Power mode

,

S-APC
mode
setting

Edge
detection
mode
selection

Power save
function
setting

Power mode

Shift
function
setting

Press

Other than
Power mode

,

Press

Press

Press

Other than
Power mode

Press

Press

Shift value CV

Select

Select

Select

Select

Timer adjustments

Timer adjustment range

1~30ms
30~50ms
50~200ms
200~500ms

* A maximum error of ±10% of the PV.

Shift value adjustment

1-ms increments
2-ms increments
10-ms increments
50-ms increments

OFF (for normal operation use)
Used to detect sensing objects highly

precisely under clean environments.

OFF (for normal operation use)
Rising edge
Falling edge

OFF (for normal operation use)
ECO half
ECO all

OFF (for normal operation use)
Shift ON

Other than

Press to manual button to

Press

Note: • Press the mode button ( ) for a minimum of three seconds to return to the display of the CV from any menu selection stage. To return to the

previous display, press the mode button (

• When the power mode is set to HIGH RESOLUTION, the S-APC mode will be always turned ON.

• When the power mode is set to HIGH SPEED, the S-APC mode will be always turned ON in the case of the R model, or otherwise the S-APC mode

will be always turned OFF.

make timer adjustments

* For timer values, refer to the

corresponding table under FULL
mode.

) first, and press the left side ( ) of the manual button ( ).

Sensitivity Settings in Edge Detection Mode

The sensitivity of the sensor will be set to maximum by pressing the
while the sensor is in edge detection mode. Make fine sensitivity adjust­ments by pressing the .

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9. Key Lock

The key lock function disables the operation of all keys.

Press the manual button for
three seconds while pressing
the mode button.

Indicates that the
keys are locked.

• Take the same step to unlock the keys.

13. List of Digital Display Items

Preset value/Current value display

Output selection (Dark ON)

Output selection (Light-ON)

Access mode selection (EASY)

Access mode selection (FULL)

Timer function setting (OFF-delay timer)

Timer function setting (ON-delay timer)

Timer function setting (One-shot timer)

S-APC mode setting (S-APC OFF)

S-APC mode setting (S-APC ON)

10. Mode Settings before Shipping (Initialization)

The following factory settings are made before shipping.

Access mode

Power mode

Timer function

Output selection

EASY

FINE

OFF

Light-ON

* Returning to factory settings: Press the button for a minimum of

five seconds while pressing the button.

11. Hints On Correct Use

• To extend the cable length, use a cable with at least a 0.3 mm2 cross­section area. Limit the length of cable extension to no more than 100 m.
(To connect several units, contact Keyence for further information.)

• Do not wire the amplifier line along with power lines or high-tension
lines, or otherwise the sensor may malfunction or receive damage due
to noise.

• When using a commercially available switching regulator, ground the
frame ground terminal and ground terminal.

• Do not use the FS series outdoors, or in a place where extraneous light
can enter the light receiving surface directly.

• Due to the individual dispersion of characteristics and the difference in
fiber unit model, the maximum sensing distance or displayed value of
all the units are not the same.

• If the sensor is used in S-APC mode for a long time, the LED indicators
will be imposed with a heavy load. In that case, the sensor will be auto­matically set to ACC mode where the current consumption of the sen­sor for light emission will be constant, and “END APC” will be displayed.
The sensor can be continuously used in this case. Replace the sensor,
however, if highly precise detection is required.

12. Specifications

Model
Light source

Response time

Display shift function
Timer function

Control output

Supply voltage

Current consumption

Rating

Ambient illumination

Ambient temperature
Relative humidity

Vibration

Shock resistance

Environment resistance

Housing material
Size
Weight

*1. The model is sold only in Japan. Consult your KEYENCE representa-

tive if the model is required outside Japan.

*2. The maximum current will be 20 mA in the case of expansion.

FS-V21*1 FS-V21G FS-V21R (P) FS-V21X*1

Red LED Greed LED
250µs (FINE)/500µs (TURBO)/1ms (SUPER TURBO)/
4ms (ULTRA TURBO)/500µs (HIGH RESOLUTION)/
50µs (HIGH SPEED)
Max. ±1999 (variable)
Timer OFF, OFF-delay timer, ON-delay timer, and one­shot timer (1 to 500 ms)
NPN open collector with 100 mA max at 40 V with a
max*2, Residual voltage of 1 V.
DC12-24V ±10% with a maximum ripple (peak to peak)
of 10%

Mode

Model

Other than
R model

R model

Incandescent lamp: 20,000 Rx max.
Sunlight: 30,000 Rx max.

-10°C to 55°C (No freezing)
35% to 85% RH (No condensation)
10 to 55 Hz, 1.5-mm double amplitude,
each in X, Y, and Z directions for two hours
500 m/s
Unit and cover are both polycarbonate made
W 9 mm x L70 mm x H 30 mm
Approximately 80 g (including 2-m cable)

Normal
ECO half
ECO all
Normal
ECO half
ECO all

2

Three times each in X, Y, and Z directions

4-element red LED Infrared (950 nm)

S-APC

S-APC mode turned ON or when

mode OFF

the HIGH SPEED mode is selected.
580 mW
480 mW
430 mW
650 mW
530 mW
480 mW

720 mW
600 mW
550 mW
720 mW
600 mW
550 mW

Excess gain display

LED bar display

Hold display

Power mode selection (FINE)

Power mode selection (TURBO)

Power mode selection (SUPER TURBO)

Power mode selection (ULTRA TURBO)

Power mode selection (HIGH SPEED)

Power mode selection (HIGH RESOLUTION)

Timer function setting (Timer OFF)

Forecast maintenance warning (END APC)

Edge detection mode (OFF)

Edge detection mode (Rising edge)

Edge detection mode (Falling edge)

ECO mode setting (ECO mode OFF)

ECO mode setting (ECO half)

ECO mode setting (ECO all)

Shift function setting (Shift OFF)

Shift function setting (Shift ON)

Key lock setting

Key unlock

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.

KEYENCE CORPORATION

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

AFFILIATED COMPANIES

KEYENCE CORPORATION OF AMERICA

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KEYENCE (MALAYSIA) SDN BHD

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PHONE: [phone]
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PHONE: [phone]
FAX: [phone]

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PHONE: [phone] FAX: [phone]

KEYENCE INTERNATIONAL TRADING
(SHANGHAI) CO., LTD.

PHONE: [phone]
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KEYENCE KOREA CORPORATION

PHONE: [phone]
FAX: [phone]

Printed in Japan

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