KEYENCE LV-SA User Manual

96M11665

Ultra-small Digital Laser Sensor

LV-S Series

Instruction Manual

Safety Information for LV-S series

	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 hazardous location and/or potentially explosive
		atmosphere.

Safety precautions on laser products

	Warning	• Use of controls or adjustments or performance of procedures other
		than those specified herein may result in hazardous radiation expo-
		sure.
		• This product employs a semiconductor laser for its light source.
		• Follow the instructions mentioned in this manual. Otherwise, injury to
		the human body (eyes and skin) may result.
		Precautions on class 1 laser products
		• Do not disassemble this product. Laser emission from this product
		is not automatically stopped when it is disassembled.
		• Do not stare into the beam.

Sensor head	LV-S31/S41/S41L/S61/S71/S72
Wavelength	655 nm
Output	290 μW
FDA(CDRH) Part 1040.10*	Class 1 Laser Product
IEC 60825-1	Class 1 Laser Product

*The classification is implemented based on IEC60825-1 following the requirements of Laser Notice No.50 of FDA (CDRH).

Safety Measures for the Laser

■ Laser emission stop input

The laser emission can be stopped by selecting the “Laser emission stop” signal (20 ms or more) from the input functions and inputting it externally. The emission stops while the signal is being input. The laser beam is emitted in 20 ms after the signal input is canceled. The control output functions according to the received light intensity even while laser emission stop is input.

Note

When the power is turned on, even when the laser emission stop signal is input, the laser is emitted for about 60 ms for self-diagnostic purpose.

Accessories

■ Amplifier

Mounting bracket: 1

End unit: 2

Instruction Manual: 1

Supplied with LV-11SA (P) Supplied with LV-12SA (P)

■ LV-S31 dedicated accessories	■ LV-S41/S41L dedicated accessories
Mounting bracket: 1	Mounting bracket: 1
Plate nut: 1
M3 x 15 screw: 2
Adjustment screwdriver: 1

■ LV-S61 dedicated accessories

Mounting bracket: 1

Plate nut: 1

M2 x 12 screw: 2

Reflector (R-6): 1

■ LV-S71/S72 dedicated accessories

Mounting bracket: 2 Nut: 4

Beam axis adjustment cap: 1

Facing ring: 2

Washer: 2

φ30

Identifying Part Names

Amplifier

■ LV-12SA (P)

Hold lock bar

Output indicator lamp

(for control output 1)

Output indicator lamp

(for control output 2)

SET button

Digital monitor

Manual button

Channel selection switch

(display settings)

Connector protection

cover

Extension connector

MODE button

Dust cover

■ LV-11SA (P)

Sensor head

■ LV-S31

Operation indicator (red)		Transmitting section
FAR indicator (red)	F	Receiving section
	J	F
JUST indicator (green)	N	N
NEAR indicator (red)
		Adjustment trimmer

■ LV-S41

Operation indicator (red)

Receiving section Transmitting section

E LV-S-IM

1

■ LV-S41L

Receiving section

Transmitting section

Operation indicator (red)

■ LV-S61

Reflector (accessory)

Operation indicator (red)

Transmitting section,

Receiving section

■ LV-S71

Operation indicator (red)
Transmitter	Receiver

Transmitting section

Receiving section

■ LV-S72

Operation indicator (red)

Receiver

Transmitter

Transmitting section

Receiving section

The operation indicator works in conjunction with the Output selected at the channel selection switch. (It does with Output1 in area detection mode.)

Input/Output Circuit Schematic

Output circuit

LV-11SA/12SA (NPN output type)

Brown *

circuitmainSensor	circuitprotectionOvercurrent	Blue *		DC12-24V
		Black/white (control output 1/2)
			Load	DC5-40V

0V

* LV-11SA only

LV-11SAP/12SAP (PNP output type)

Brown *

DC12-24V

Sensormain circuit	Overcurrentprotection circuit
	Black/white (control output 1/2)
	Load
	Blue *
	0V

* LV-11SAP only

The power of the expansion unit LV-12SA (P) is supplied by the Extension connector on the side of the main unit LV-11SA (P). The power wires (brown and blue) of the main unit and those of the expansion unit are unified inside by the connector.

■	Input circuit
•	Not to be used				Select either one.
•	Light emission stop input
•	External calibration input				(switched by the amplifier
•	Setting value bank selection input				function selection)
•	Received light intensity shift input

LV-11SA/12SA (NPN output type)

circuit	DC3.3V
main		Pink (input)
Sensor		PLC etc.
	(Short-circuit current 1 mA max.)	Blue *
		0V
* LV-11SA only

LV-11SAP/12SAP (PNP output type)

	circuit	Brown *	DC12-24V
			PLC etc.
	main
		Pink (input)
	Sensor
		(Short-circuit
		current 2 mA max.)

* LV-11SAP only

Mounting the Amplifier Unit

■ Mounting on a DIN rail

1)	Align the claw at the bottom of the main body with the	(3)
	DIN rail. While pushing the main body in the direction
	of the arrow 1, slant it in the direction of the arrow 2.	(2)
2)	To dismount the sensor, raise the main body
	in the direction of the arrow 3 while pushing	(1)
	the main body in the direction of the arrow 1.

■Installation using the mounting bracket (accessory) (LV-11SA/11SAP only)

Mount the amplifier unit using the supplied mounting bracket as shown in the figure.

Mounting bracket M3 screw (OP-25431)

■ Connecting several amplifier units

Up to 16 expansion units LV-12SA can be installed to the main unit LV-11SA.

1 Remove the protection cover on the side of the main unit.

2 Install the amplifier one by one on the DIN rail.

(2)

(1)

3 Engage the two claws of the expansion unit with the recesses on the main unit

side until you hear a click sound.

4 Install the end units on both ends of the amplifier unit.

Fasten the screws on the top of the end units (at two positions on both end units) with the Philips screwdriver.

Two end units are supplied with an expansion unit. OP-26751

* The stickers on the right are provided. Attach the sticker on the place near the amplifier unit.

■ Removing the amplifier unit

1		Remove the end units.
2		Slide the expansion unit and remove it one by one.
			•	When installing additional expansion unit, be sure to use the DIN rail and the end units.
	Important
			•	Turn off the power when installing or removing the unit.

•Do not remove the protective cover of the extension connector on the amplifier expansion unit that is added at the end.

•Do not remove the amplifier unit with all added units attached, from the DIN rail.

•Verify the operation ambient temperature after additional installation. (“Specifications” page 9)

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E LV-S-IM

Connecting the Sensor Head and the Amplifier Unit

■ How to connect the amplifier unit and the connector

1 Open the dust cover, and tilt the hold-lock lever.

2 Raise the hook, and insert the connector to the very end.

3 Lower the hook and hook the part shown in the figure, and then raise the hold-lock lever.

Note

When shortening the sensor head cable, follow the instructions given in the “Sensor Head Connector Assembly Manual” included with the sensor head.

Mounting and Adjusting the Sensor Head

LV-S31

■ Adjusting the trimmer (detection position)

The detection range can be selected as desired by adjusting the trimmer.

	When detecting the target			When detecting the target
	from a long distance, turn the			from a short distance, turn the
	trimmer clockwise to adjust.			trimmer counterclockwise to
F	F	F	F	adjust.
J		J
N	N	N	N

■ Adjusting the center of detection

1 Place the workpiece at the position you want to set as the center of detection.

2 Turn the trimmer until JUST indicator (2) illuminates in green.

When (1) illuminates, turn the trimmer clockwise until (2) illuminates.

(1)F F When (2) illuminates, the adjustment is

(2)J complete.

N N

(3)

When (3) illuminates, turn the trimmer counterclockwise until (2) illuminates.

Finer adjustment is possible by looking at the display on the amplifier (page 7).

■ Detecting a height difference

A stable detection is made possible by adjusting the trimmer so that the middle point of the height comes to the center of detection.

■ Movement directions of the workpiece

Movement direction

Detecting		Detecting	Detecting
object	Movement	object	object	Movement
	direction			direction

LV-S41/S41L

Be sure to use the supplied mounting bracket.

1 Press the mounting bracket on the sensor head.

Be sure to hook the A portion of the mounting bracket on the B portion of the sensor head.

A

B

2 Install the sensor head on the flat surface with the M3 screws as shown in the following figure. (The M3 screw is not an accessory.)

LV-S71/S72

Mount the sensor head such that the letter “T” (on the transmitter) or “R” (on the receiver) faces upward. The side where the operation indicator illuminates should face upward.

Fixing nut

Limit the tightening Beam axis adjusting torque up to 1.2 Nm. screw

■ Adjusting the beam axis

The angle of the beam axis can be changed upward if the screw indicated by the arrow is tightened, and downward if loosened.

When you want to lower the beam axis

When you want to raise the beam axis

Adjust the spot to be emitted at the center on the receiver.

The adjustment is facilitated by attaching the beam-axis adjustment cap supplied with the sensor head to the tip of the receiver. Once the adjustment is complete, remove the beam-axis adjustment cap.

Beam axis adjustment cap (supplied with the LV-S71)

E LV-S-IM

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