System design and selectable functions
Leuze electronic
SOLID-2
13
TNT
35/7-2
4V
Review-Stand, , 8. April 2015
DEUTSCH
ENGLIS
H
FRAN
ÇAIS
ITALIANO
ESPAÑOL
NEDERLANDS
3
System design and selectable functions
3.1
The opto-electronic protective device
Working principle
SOLID-2 consists of a transmitter and a receiver. Beginning with the first beam (the
synchronizing beam) directly after the display panel, the transmitter pulses beam for
beam in rapid sequence. The synchronization between transmitter and receiver is
performed optically.
The receiver recognizes the specially coded pulse packages of the transmitter beams
and opens the corresponding receiver elements in sequence in the same rhythm. A
protective field is consequently formed in the area between transmitter and receiver.
Its height depends on the geometrical dimensions of the protective device and its width is
determined by the distance selected between the transmitter and receiver within the
permissible detection range.
Functions such as start/restart interlock or contactor monitoring can optionally be
performed by the Receiver Extended version.
3.2
Functions of the Transmitter
3.2.1
Transmission channel
The infrared beams are modulated with specially coded pulse packages so that the are
distinct from ambient light, thus ensuring undisturbed operation.
Welding sparks or warning flash lights from passing forklifts do not having any effect on
the protective field.
If two protective fields are located directly next to each other for two adjacent machines,
however, measures must be taken to ensure the optical protective devices do not affect
each other.
Both transmitters should first be assembled “back to back“ so that the beams radiate in
opposite directions. This prevents one system from affecting the other.
a = Transmitter
b = Receiver
Fig. 3.1-1:
Working principle of the opto-electronic protective device
a
b
