Banner L-GAGE LG10 User Manual

L-GAGE Laser Gauging Sensor Models

L-GAGE™Laser Gauging Sensor – 45 to 60 mm Range

Class 2 visible laser displacement sensor with both analog and discrete (switched) outputs

Printed in USA P/N 55801

L-GAGE Laser Gauging Sensor Features

• Self-contained Class 2 modulated visible laser gauging sensor needs no separate controller

• Narrow effective beam is excellent for precision distance, height or thickness
measurement or gauging applications

• Resolution to better than 10 microns

• Sensing window may be sized as needed, and placed anywhere within the

45.0 to 60.0 millimeter (1.77" to 2.36") sensing distance; 1.5 mm (0.06") minimum
window size

• Banner’s unique scalable analog output (patent pending) automatically distributes
the output signal over the width of the programmed sensing window

• Analog and discrete (switched) outputs

• Window limits for analog and discrete outputs may be set independently

• Analog output slope is either positive or negative, depending upon which window
limit is programmed first

• Fast, easy-to-use integrated push-button TEACH-mode programming; no
potentiometer adjustments

• Remote TEACH function for security and convenience

• Unique feature holds analog output value for 2 seconds upon loss of signal

• Modulated laser beam and narrow optical band-pass filter provide a high level of
ambient light immunity, including immunity from high-energy factory lighting

• Alarm output for signal saturation

• Output response is programmable for three speeds

• 12 to 30V dc operation

• Enclosure rated IECIP67; NEMA 4X

LG5B65PI

Models Sensing Distance Cable*

Supply

Voltage

LG5B65NI

45.0 to 60.0 mm
(1.77 to 2.36")

2 m (6.5')

8-wire

12 to 30V dc

* NOTE: 9 m (30') cables are available by adding suffix “W/30” to the model number of any cabled sensor (e.g., LG5A65NI W/30)

†

See Figure 2 on page 4 for more information. NOTE: In general, 70 mm focal point models are recommended for most distance measurement
applications, because small surface irregularities will be averaged out due to the larger beam size.

TEACH

SLOW

FAST

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S
IG

N

A

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SPEED

A

D

PNP (sourcing)

Discrete Output

NPN (sinking)

Analog Output

Analog current output
(4 to 20 mA)

PNP (sourcing)

LG5A65PI

NPN (sinking)

LG5A65NI

Focal Point

†

53 mm (2.1")

Beam size at 53 mm:

ø0.1 mm (ø0.004")

70 mm (2.8")

Beam size at 53 mm:

0.4 x 0.6 mm

(0.016 x 0.024")

L-GAGE™ Laser Gauging Sensor

page

2

L-GAGE Laser Gauging Sensor Overview

Banner’s Class 2 visible laser displacement sensor brings a sophisticated, yet cost­effective solution to precision measurement applications. L-GAGE Series sensors
feature all-in-one design and require no separate controller.

Near and far sensing window limits are set quickly using simple push-button or
remote signal TEACH-mode programming. One sensor can simultaneously provide
both analog and discrete (switched) outputs. Sensing window limits for each output
may be independently programmed, if desired. The analog signal features Banner’s
unique scalable output (patent pending), which automatically distributes the 4 to 20
milliamp output signal over the width of the programmed sensing window. If an
analog voltage output is required, this can be accomplished by using an alternate
hookup. (See Hookups, page 5.)

The L-GAGE Laser Gauging Sensor boasts many additional features, including
selectable response speed, self-diagnostics with alarm output, comprehensive status
indicator system, and unique output “hold” function for momentary signal loss in
profiling applications.

Optical Triangulation

The design of the L-GAGE Laser Gauging Sensor is based on optical triangulation (see
figure 1). An emitter transmits visible laser light through a lens, toward a target. The
laser light beam from the emitter bounces off the target, scattering some of its light
through another lens to the sensor’s PSD (position-sensitive device) receiver element.
The target’s distance from the receiver determines the angle the light travels to the
receiver element; this angle in turn determines where the received light will fall along
the PSD receiver element.

The position of the light on the PSD receiver element is processed through analog
and digital electronics and analyzed by the microprocessor,
which calculates the appropriate output value. The analog
output provides a variable 4 to 20 milliamp current that is
proportional to the target’s position within the user-programmed
analog window limits (see page 8). The discrete (switched)
output energizes whenever the target is located between the
user-programmed discrete window limits. Analog and discrete
window limits may be the same, or programmed independently.

Figure 1. Optical triangulation sensing system overview

Signal

Conditioning

Circuitry

Microprocessor

Output

Circuitry

Emitter

Circuitry

PSD

Receiver

Element

R

E

Laser

Emitter

Lenses

Near
Limit

Target Movement

Programmed

Sensing Window

Far

Limit

L-GAGE™ Laser Gauging Sensor

page

3

L-GAGE Laser Gauging Sensor Specifications

Sensing Range

Supply Voltage 12 to 30V dc, (10% maximum ripple); 50 mA max at 24V dc (exclusive of load)
Supply Protection Circuitry Protected against reverse polarity, over voltage, and transient voltages
Delay at Power-up 1.25 second
Sensing Beam 670 nm visible red IEC and CDRH Class 2 laser; 0.15 mW radiant output power
Output Configurations Discrete (switched) output: SPST solid-state switch; choose NPN (current sinking) or PNP (current

sourcing) models

Analog output: 4 to 20 milliamp current sourcing
Alarm output: SPST solid-state switch; NPN (current sinking) or PNP (current sourcing), depending on

discrete output model

Output Ratings Discrete (switched) and Alarm output: 100 mA maximum

Off-state leakage current: less than 5 microamps
Output saturation voltage (PNP output): less than 1.2 volts at 10 mA and less then 1.6 volts at 100 mA
Output saturation voltage (NPN output): less than 200 millivolts at 10 mA

and less then 600 millivolts at 100 mA

Analog output: 1 kΩ max @ 24V dc; max load resistance = Vcc – 3.3

[

0.02

Ω

]

Output Response Time Discrete Output:

Fast: 3.6 milliseconds ON and OFF
Medium: 10 milliseconds ON and OFF
Slow: 40 milliseconds ON and OFF

Analog Output (-3 dB):

Fast: 250 Hz (1.6 milliseconds average with 1.6 millisecond update rate)
Medium: 40 Hz (10 milliseconds average with 1.6 millisecond update rate)
Slow: 10 Hz (40 milliseconds average with 2.1 millisecond update rate)

Analog Resolution and
Repeatability of Discrete
Trip Point*

Fast: 0.06% of sensing distance (<30 microns @50 mm)
Medium: 0.03% of sensing distance (<15 microns @50 mm)
Slow: 0.02% of sensing distance (<10 microns @50 mm)

Analog Linearity* ± 60 microns (±0.002")

Hyste r esis (Discrete Output) <0.35% of sensing distance

Laser Control Connect green wire to +5 to 30V dc to enable laser beam; connect to 0 to +1.8V dc (or open connection)

to disable; 250 millisecond delay upon enable.

45.0 to 60.0 mm (1.77" to 2.36")

Adjustments Response speed: push button toggles between 1.6, 10, and 40 milliseconds

Window limits (analog or discrete): TEACH-mode programming of near and far window limits (see

programming procedure). Limits may also be taught remotely via TEACH input (see page 7).

Analog output slope: the first limit taught is assigned to minimum output current (4mA).

Output Protection Outputs are protected against continuous overload and short circuit

Color Sensitivity* <75 microns (0.003") (typical) for white to dark gray ceramic target
Temperature Drift ±7 microns/°C

*Using white ceramic test surface (see Application Notes).

Resolution and linearity specified at 24V dc, 22°C.

Minimum Window Size
(Analog or Discrete)

1.5 mm (0.06")

Remote Teach and Laser
Control Input Impedance

55 kΩ

G

N

L-GAGE Laser Gauging Sensor Specifications (continued)

L-GAGE™ Laser Gauging Sensor

page

4

Indicators

Construction Housing: Zinc alloy die-cast, plated and painted finish

Cover plate: aluminum with painted finish
Lens: acrylic

Green Power ON LED: Indicates when power is ON, overloaded output and laser status.
Yellow Output LED: Indicates when discrete load output is conducting.
Red Signal LED: Indicates when target is within sensing range and the condition of the received light

signal.
Tri-color Red/Green/Yellow TEACH LED: Indicates sensor is ready for programming each limit (indicates
red for analog output, green for discrete, and yellow for simultaneous analog and discrete.)
Yellow Fast/Slow LEDs: Combination of 2 lights ON or OFF indicates one of 3 response speeds.
NOTE: See page 5 for more information on indicator behavior.

Environmental Rating IP67, NEMA 4X

Vibration and
Mechanical Shock

Vibration: 60 Hz, 30 minutes, 3 axes
Shock: 30G for 11 milliseconds, half sine wave, 3 axes

Operating Conditions Temperature: -10° to +50° C (+14° to 122° F)

Maximum relative humidity: 90% at 50° C, non-condensing

Application Notes For comparison, white ceramic test surface has approximately 91% of the reflectivity of a white Kodak test

card with a matte finish. A dark gray ceramic test surface has approximately 11% of the reflectivity of a white
Kodak test card with a matte finish.

Figure 2. L-GAGE Laser Gauging Sensor and beam dimensions

Connections 2 m (6.5') or 9 m (30') 7-conductor shielded PVC-jacketed attached cable.

L-GAGE Beam Dimensions (typical)

Focal
Point

†

Distance

Beam

Width (X)

Beam

Height (Y)

53 mm
(2.1")

45 mm 0.3 mm 0.5 mm

60 mm

53 mm

0.3 mm

0.1 mm

0.5 mm

0.1 mm

70 mm
(2.8")

45 mm 0.6 mm 0.9 mm
53 mm 0.4 mm 0.6 mm
60 mm 0.3 mm 0.4 mm

† The Focal Point is the distance measured from

the lens (front of sensor) at which the diameter
of the laser image is smallest.

A

L

D

A

55.3 mm
(2.18")

4.6 mm
(0.18")

45.5 mm
(1.79")

20.2 mm (0.80")

POWER

68.3 mm

OUTPUT

SIGNAL

(2.69")

D

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Avoid exposure -

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laser light emitted
from his aperture

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RADIANT POWER 0.15 mW
8KHz 8-16% DUTY CYCLE
660 - 680 nm
COMPLIES WITH 21 CFR

1040.10 AND EN60825-1:1994

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SPEED

23.9 mm

19.1 mm

Beam Dimensions

X

Emitted Light

(0.94")

Received Light

(0.75")

Y

82.3 mm
(3.24")

9.3 mm
(0.37")