KEYENCE FS-21X User Manual
WARNING
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
96M11223
Fiber insertion sign
Cable outer dia.
ø1.3
ø1.0
Adapter
Adapter A
(OP-26500)
Adapter B
(OP-26501)
Appearance
Single-core fiber
Multi-core fiber
Transmitter
Receiver
Monitor output (1 to 5 V)*
Max. 100mA
0 V
12 to 24 VDC
Devices with 10 kΩ
input impedance min.
(Control output)
Blue
Black
Orange*
Load
5 to 40 VDC
Brown
Photoelectric
sensor main circuit
Overcurrent
protection circuit
Protection
circuit
* FS-V21RM only.
Max. 100mA
0 VDC
12 to 24 VDC
(Control output)
Brown
Blue
Black
Load
Photoelectric
sensor main circuit
Overcurrent
protection circuit
3. Mounting Unit
Dual Digital Fiber Sensor
FS-V21/21G/21R(P)/21RM/21X
Instruction Manual
Read this manual before using the product in order to achieve
maximum performance.
Keep this manual in a safe place after reading it so that it can be
used at any time.
1. Safety Precautions
• This product is just intended to detect the object(s). 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.
• This product uses DC power. Do not apply AC power. The product
may explode or burn if an AC voltage is applied.
■ UL Certificate
This product is an UL/C-UL Listed product.
• UL File No. E301717
• Category NRKH, NRKH7
• Enclosure Type 1 (Based on UL50)
Be sure to consider the following specifications when using this product
as an UL/C-UL Listed Product.
• Use the power supply with Class 2 output defined in NFPA70 (NEC:
National Electrical Code).
• Use with the over current protection device which is rated 30V or more
(rated 40V or more for NPN output type) and not more than 2A.
● 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.
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.
2. Part Names
■ Accessories
Check that all the accessories are ready before use.
Instruction manual (x 1) Mounting bracket (x 1)
* The operation indicator of the FS-V21X (infrared model) will not be lit.
•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.
5. I/O Cricuit
Refer to the following I/O circuit diagram when connecting the unit to peripheral devices.
● FS-V21/21G/21R/21RM/21X ● FS-V21RP
1
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.
Workpiece
The display will be lit
when the workpiece
is detected.
3 s min.
Workpiece
The display will flash
for a moment when
the setting is
finished. Then the
PV will be displayed.
Front edge
Press the output selector.
The display indicates that
the sensor is in dark-ON
mode. The CV will be
displayed if no buttons are
operated for approximately
five seconds.
Press the manual button
➁
within five seconds after
pressing the output
selector ➀.
EASY Only basic functions are displayed.
FULL All available functions are displayed.
EASY
FULL
Press 3 s min.
Press 3 s min.
Completion
of selection
Select
6. Making Sensitivity Settings
3 s min.
Workpiece
The display will
flash when the
settings are
completed.
PV (green)
CV (red)
Workpiece
The display will be lit
when the workpiece
is detected.
Workpiece
The PV will appear when
the settings are completed.
3 s min.
The display will flash
for a moment when
the setting is finished.
Then the PV will be
displayed.
“Reflective model”
“Through-beam model”
● 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.
• When the setting is finished, the digital monitor will display the PV
in green.
● 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).
● Manual Calibration
In this mode, make manual PV settings.
● 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).
2) Locate the front edge of the workpiece in the sensing area. Then
press the set button for a minimum of three seconds.
2) Locate the workpiece in the sensing area (i.e., in front of the fiber unit).
Then press the set button for a moment.
* 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.
7. Selecting Output
Either light-ON mode or dark-ON mode is selectable.
•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.
* If the sensing distance is insufficient, make sensitivity settings in the
sensor in two-point tuning mode.
• The mode is set to EASY before shipping.
2
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