Page 48
Functional Principle, Technical Data
optoCONTROL 1200/1201
3.
Functional Principle, Technical Data
3.1
Measurement Principle
The optoCONTROL 120x is based on the principle of light quantity measurement. The light from a red laser diode is fanned out by an
optical system to form a parallel light curtain which is aligned to the receiver unit. In the receiver unit the light is passed via various fil-
ters and optical components through a precision aperture onto a light sensitive detector. The quantity of the incident light is processed
by an analog electronic system and output as an analog signal.
Light source
Target
Receiver
Glass lens Interference filterAperture Lens
Photo diode
Polarization filter
Fig. 4 Measurement principle optoCONTROL 1200/1201
i
The light source and receiver form an unit and must not be switched.
3.2
Structure of a Complete Measurement System
The optoCONTROL 120x consists of a light source and a receiver unit. The complete control electronics is inside the receiver and no
additional controller is necessary. The receiver and the light source can be mounted at various distances and the 90° version allows
installation in tight spaces.
In addition the analog output, an adjustable limit switch is included. It can be wired as NPN logic (active if light quantity above limit) as
well as PNP logic (active if light quantity below limit).
Summary of Contents for ODC1200
Page 40: ...optoCONTROL 1200 1201...
Page 79: ......
