Banner L-GAGE Q50 Series - Manual (Page 2)

L-GAGE Q50A –
Complementary Discrete Output Sensor
page 2
Banner Engineering Corp. • Minneapolis, U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
Sensor Overview
The Q50A Complementary Discrete is an easy-to-use
triangulation sensor which provides a sophisticated, yet cost-
effective solution for demanding applications. Q50A Series
sensors feature compact, all-in-one design and require no
separate controller.
Each sensor has two discrete outputs (both NPN or both PNP).
The complementary output can be configured for one of two
conditions:
• A sensing window consisting of two switch points
• A single switch point, as with an adjustable-field sensor
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 digital electronics and analyzed by the
microprocessor. The microprocessor will compare the target
position to the taught window limits and then change the
discrete outputs as required.
Signal
Conditioning
Circuitry
Microprocessor
Output
Circuitry
Emitter
Circuitry
Emitter
Lenses
Near
Limit
Target Movement
Programmed
Sensing Window
Far
Limit
PSD
Receiver
Element
E
R
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