8
5 Function
The protected area (P) is generated between the transmitter and the receiver and
is defined by the protected area height (H) and the protected area width (range)
(I)�
The protected area height is the height protected by the safety light curtain� It
depends on the design (→ 12 Technical data).
If the safety light curtains are installed horizontally, this value indicates the depth
of the protected area�
The protected area width (range) is the maximum distance between transmitter
and receiver (→ 12 Technical data).
If the protected are is clear, the two outputs (OSSDs) of the receiver are active�
If an object (O) with a diameter greater than or equal to the resolution (d) enters
the protected area, the outputs are switched off�
The resolution (d) (detection capability) of the safety light curtain depends on the
lens diameter (B) and the lens distance (C) and remains constant at all application
conditions�
transmitter (T)
receiver (R)
O = object
C = lens distance
B = lens diameter
d = resolution
To ensure that an object (O) is reliably detected in the protected area the
dimensions of the object (O) must be at least as great as the resolution (d)�
