EOS2 SAFETY LIGHT CURTAIN
PRINCIPLE OF OPERATION
If the protected area is clear, the two outputs on the Receiver are active and
enable the machine to which they are connected to operate normally.
Each time that an object bigger than or equal in size to the resolution of the
system intercepts the optical path of one or more beams, the Receiver deactivates
its own outputs.
This condition enables dangerous machine movements to be stopped (by means
of an adequate machine emergency stop circuit).
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Resolution is the smallest sized object that, passing through the protected area,
interrupts at least one of the beams generated by the light curtain (Figure 1),
causing certain intervention of the device and consequent stopping of the
dangerous movement of the machine.
Figure 1 - Resolution
P = Pitch between two lenses
D = Diameter of a lens
R = Resolution = P+D
P
R
D
Receiver
Emitter
Beam
Resolution remains constant regardless of working conditions as it depends only on the
geometric characteristics of the mirrors and on the centre distance between two adjacent
lenses.
The height of the protected area is the effective height protected by the safety light
curtain. If the curtain is positioned horizontally, this value indicates the depth of the
protected area.
The working range indicates how far the emitter and receiver can be separated and
function properly.
EOS2 is available with the following resolutions:
• 30mm (protected heights from 150mm to 1500mm): PROTECTION OF THE HANDS.
• 40mm (protected heights from 300mm to 1500mm): PROTECTION OF THE HANDS.
• 50mm and 90mm (protected heights from 300mm to 1800mm):
PROTECTION OF THE LIMBS.
English
The EOS2 is also available in a Multibeam version with a distance between the
mirrors of:
• 500mm (2 beams), 400mm (3 beams), 300mm (4 beams).
PROTECTION OF THE BODY.
4 8540738 • 2nd December 2009 • Rev.2
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