Banner WORLD-BEAM QS30 Series - Manual (Page 2)

WORLD-BEAM ® QS30AF Adjustable-Field Sensor
2
P/N 111384 rev. D
Banner Engineering Corp. • Minneapolis, MN U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
Overview
The QS30AF is an easy-to-use triangulation sensor which provides a sophisticated,
yet cost-effective solution for demanding applications.
The sensor features two identically configured outputs, one each NPN and PNP.
The sensor’s compact housing has a large, easy-to-see bargraph display plus
bright LEDs for easy configuration and status monitoring during operation. The
sensor can be side-mounted, using its integral mounting holes, or front-mounted,
via its 30 mm threaded barrel.
Optical Triangulation
The function of the QS30AF Sensor is based on optical triangulation (see Figure
2). 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 falls on 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 cutoff limits and then change the outputs as required.
Figure 1. QS30 features
Yellow Output Conducting
Indicator
Green Power ON
Indicator
Bargraph
Display
Cutoff
Switchpoint
Configuration
Push
Buttons
SETUP Status
Indicators:
Delay
Normally Closed
Normally Open
Signal
Conditioning
Circuitry
Microprocessor
Output
Circuitry
Emitter
Circuitry
Emitter
Lenses
Target Movement
E
Programmed
Cutoff Point
Far
Near
Receiver PSD
Switchpoint
Figure 2. Using optical triangulation to determine sensing distance