KEYENCE FS-21X User Manual

Instruction manual, Dual digital fiber sensor, Safety precautions

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1. Safety Precautions

WARNING

• 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.

Accessories
Check that all the accessories are ready before use.

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

3. Mounting Unit

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 di-
rection 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.

96M11223

4. Connecting Fiber Unit

Fiber insertion sign

1) Open the dust cover in the di-

rection 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., approxi-
mately 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.

Cable outer dia.

ш1.3

ш1.0

Adapter

Adapter A

(OP-26500)

Adapter B

(OP-26501)

Appearance

• To connect the coaxial reflective type fiber unit to the amplifier, connect

the single-core fiber to the transmitter side, and connect the multiple-
core fiber to the receiver side.

Single-core fiber

Multi-core fiber

Transmitter

Receiver

5. I/O Cricuit

Refer to the following I/O circuit diagram when connecting the unit to pe-
ripheral devices.
FS-V21/21G/21R/21RM/21X FS-V21RP

Monitor output (1 to 5 V)*

Max. 100mA

0 V

12 to 24 VDC

Devices with 10 k

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. 100 mA

0 VDC

12 to 24 VDC

(Control output)

Brown

Blue

Black

Load

Photoelectric sensor main circuit

Overcurrent protection circuit

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

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.

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