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Measuring light grids (10 mm beam spacing)
OY51
7
5 Function
The detection zone (P) is generated between the transmitter and the receiver and is defined by the
detection field height (H) and the detection field width (I).
The detection field height is the height measured by the light grid. It depends on the design of the unit.
The detection field width is the maximum distance between transmitter and receiver.
As soon as an object (O) enters the detection zone, light beams are blocked depending on the object
size and position. Based on the number of consecutive beams blocked and the known beam spacing
(C), conclusions can for example be drawn about the object height.
2
1
1:
Transmitter (T)
2:
Receiver (R)
O:
Object
C:
Beam spacing
B:
Lens diameter
The object diameter must be large enough to interrupt at least two light beams. Smaller objects
can lead to faulty measurement results.
Applications:
Detection types
Description
Detection of an object in
motion
The object to be detected must have a compact shape and block a certain number of contiguous
light beams. The light barrier detects the previously stored object in any position.
Detection of a stationary
object
The object to be detected can have any shape. The light barrier only detects the object if it
occupies the same position in the detection field.
5.1 IO-Link
This unit has an IO-Link communication interface which enables direct access to process and
diagnostic data. In addition it is possible to set the parameters of the unit while it is in operation.
Operation of the unit via the IO-Link interface requires an IO-Link master.
With a PC, suitable IO-Link software and an IO-Link adapter cable, communication is possible while
the system is not in operation.
The IODDs necessary for the configuration of the unit, detailed information about process data
structure, diagnostic information, parameter addresses and the necessary information about the
required IO-Link hardware and software can be found at www.ifm.com.
GB