Safety notes
12
SOLID-2SF-M
Leuze electronic
Review status, , Mittwoch, 8. April 2015
DEUTSCH
E
NGLISH
FRAN
ÇAIS
ITALIA
N
O
ESPAÑOL
N
EDERLANDS
3
Safety notes
3.1
The opto-electronic protective device
Working principle
SOLID-2 SF consists of a transmitter and a receiver. Beginning with the first beam
(synchronization 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
range.
The safety output consists of the 1-channel SSDs, which provide the status of the
corresponding beams (SSD 1 shows the status of beam 1, SSD 2 the status of beam 2,
SSD 3 the status of beam 3 and SSD 4 the status of beam 4), and the Dyn SSD output
shared for all beams. When no errors are present on the SOLID-2 SF, this delivers a
symmetrical square-wave signal with 300 ms pulse width. This dynamic signal must be
monitored by the downstream control unit. If the Dyn SSD signal fails to appear, the power-
driven machinery must be switched off. Correct connection must be checked with the
machine's first startup!
Picture 3.1:Working principle of the opto-electronic protective device
{
Control unit
Receiver
Transmitte
Additionally for
4-beam system
Dyn SSD
1 to 4 beam status outputs (1
output per beam)
Beam 1
Beam 2
Beam 3
Beam 4
