Banner L-GAGE Q50 User Manual
L-GAGE™Q50A Series with Analog Output
LED-Based Linear Displacement Sensor with Analog Output and TEACH-Mode
Programming
Printed in USA 06/01 P/N 67416
L-GAGE Q50A Analog Output Sensor Features
• Fast, easy-to-use TEACH-Mode programming; no potentiometer adjustments
• Selectable output response speeds: 4 milliseconds or 64 milliseconds (see hookup)
• Teach a sensing window size and position, or a 50 mm window centered on a
taught point
• Two sensing ranges, depending on model: 50 to 150 mm (visible red beam
models), and 50 to 200 mm (infrared beam models)
• Sensor linearity is better than 1.5 mm
• Banner’s patented scalable analog output (U.S. patent #6,122,039) automatically
distributes the output signal over the width of the programmed sensing window
• Analog output slope can be either positive or negative, depending upon which
window limit is programmed first
• Two bicolor Status LEDs
• Choose 2 meter or 9 meter unterminated cable, or swivel 5-pin Euro-style QD
connector
• Rugged construction withstands demanding sensing environments; rated IEC IP67,
NEMA 6
• Select models with either visible red or infrared beam
• Select models with either a 0-10V or 4-20 mA output
L-GAGE Q50A Analog Output Sensor Models
Model
Number
Sensing
Range Cable*
Supply
Voltage Beam Output
Q50AVI
50 to 150 mm
(2.0" to 5.9")
5-wire,
2 m (6.5') cable
15 to
30V dc
Visible Red
LED
4 to 20 mA
Q50AVIQ 5-pin Euro-style QD
Q50AVU
5-wire,
2 m (6.5') cable
0 to 10V
Q50AVUQ 5-pin Euro-style QD
Q50AI
50 to 200 mm
(2.0" to 7.9")
5-wire,
2 m (6.5') cable
Infrared LED
4 to 20 mA
Q50AIQ 5-pin Euro-style QD
Q50AU
5-wire,
2 m (6.5') cable
0 to 10V
Q50AUQ 5-pin Euro-style QD
* 9 meter cables are available by adding suffix “W/30” to the model number of any cabled
sensor (e.g., Q50AVI W/30). A model with a QD connector requires a mating cable;
see page 8.
WARNING . . .
Not To Be Used for
Personnel Protection
Never use these products as
sensing devices for personnel protection.
Doing so could lead to serious injury or
death.
These sensors do NOT include the selfchecking redundant circuitry necessary to
allow their use in personnel safety
applications. A sensor failure or
malfunction can cause either an energized
or de-energized sensor output condition.
Consult your current Banner Safety
Products catalog for safety products which
meet OSHA, ANSI and IEC standards for
personnel protection.
NOTE: Q50B models also available, with 100 to
400 mm range
!
L-GAGE Q50A – Analog Output Sensor
page 2
Banner Engineering Corp. • Minneapolis, U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
L-GAGE Q50A Analog Output Sensor Overview
The Q50A is an easy-to-use triangulation sensor which provides
a sophisticated, yet cost-effective solution for demanding
measurement applications. Q50A Series sensors feature
compact, 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. The
analog output has the option of being set with a sensing
distance centered within a 50 mm window. The sensor features
Banner’s patented digital signal processing algorithm (U.S. patent
#6,122,039), which automatically distributes the 0 to 10V dc (or 4
to 20 mA) output signal over the width of the programmed
window.
Optical Triangulation
The function of the Q50A Sensor is based on optical
triangulation (see Figure 1). The emitter circuitry and optics
create a light source which is directed toward a target. The light
source bounces off the target, scattering some of its light
through the sensor’s receiver lens to its position-sensitive-device
(PSD) receiver element. The target’s distance from the receiver
determines the light’s angle to the receiver element; this angle
determines where the returned light will touch 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 either a current or voltage
output proportional to the target’s position within the userprogrammed analog window limits (see page 4).
Figure 1. Using optical triangulation to determine sensing distance
Figure 2. L-GAGE Q50A sensor features
Range
Indicator LED
(red or green)
Teach/Output
Indicator LED
(yellow or red)
Programming
Push Button
QD fitting rotates for hookup in any direction
PSD
Receiver
Element
R
Signal
Conditioning
Circuitry
Microprocessor
Output
Circuitry
Emitter
Circuitry
E
Emitter
Lenses
Near
Limit
Target Movement
Programmed
Sensing Window
Far
Limit
L-GAGE Q50A – Analog Output Sensor
page 3
Banner Engineering Corp. • Minneapolis, U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
Using the L-GAGE Q50A Analog Output Sensor
Response Speed
To control the response speed, connect the black wire as
follows:
Fast Speed (4 ms): Connect black wire to +5 to 30V dc
Slow Speed (64 ms): Connect black wire to 0 to +2V dc (or
open connection)
Window Limits
Window limits may be taught to the sensor either remotely
(using the gray wire) or by using the sensor’s Teach push
button.
The Q50A sensor operates in two modes: TEACH (or
programming) mode and RUN mode.
NOTE: All LED indicators momentarily go OFF when the sensor
changes state between RUN and TEACH modes.
Indicator Status Conditions
Indicator Status
Range LED Green — Target is within sensing range
(green/red) Red — Target is outside sensing range
OFF — Sensor Power OFF
Teach/Output Yellow — Target is within taught window limits
LED OFF — Target is outside taught window limits
(yellow/red) Red — Sensor is in TEACH mode
TEACH-Mode Programming
Push-Button Procedure
1. Press the Teach push button until the Teach LED turns red
(hold button in for about 2 seconds). This indicates the
sensor is waiting for the first window limit.
2. Position the target for the first limit. The Range LED should be
green, indicating a valid target. Briefly “click” the Teach push
button. This will teach the sensor the first limit. The Teach
LED will flash red at 2 Hz to acknowledge receiving the first
window limit; it is now waiting for the second limit.
3. Position the target for the second limit and “click” the Teach
push button again to teach the sensor the second limit. The
Teach LED will return to either yellow or OFF as the sensor
returns to RUN mode.
Figure 4. L-GAGE Q50A color sensitivity (This represents the
expected change in output when the target color is
changed from a 90% reflectance Kodak White Card to a
6% and 18% reflectance surface.)
Figure 3. L-GAGE Q50A resolution
Q50A (infrared models) range is 50 - 200 mm
Q50AV (visible models) range is 50 - 150 mm
5
4
3
2
Resolution (mm)
1
0
50
NOTE: Resolution is independent of color (90% Kodak White Card to 6% Black)
Fast Response
100
Distance (mm)
Slow Response (90%
Reflectance Kodak White
Card to 6% Reflectance
Black Card)
150 200
9
8
7
6
5
4
3
Color Sensitivity (mm)
2
1
0
50
NOTES:
Color sensitivity is independent of response time
Q50A (infrared models) span is 50-200 mm
Q50AV (visible models) span is 50-150 mm
6% Reflectance Black Card
18% Reflectance Kodak Grey Card
100
Distance (mm)
150 200
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