Operation Manual
Safe2+ / Safe4
©
CEDES
Safety & Automation AG / June 2008
www.cedes.com
7
4.5. Perimeter
systems
Perimeter systems are usually produced by means
of several single beam light barriers. But the flexibil-
ity of the Safe2+ or Safe4 system allows also the
production of vertical entry safeguarding according to
the standard EN 999. Such systems are composed
of active and passive elements in one compact pro-
file. The element length of each is 120 mm.
The big advantage of Safe 2+ or Safe4 Perimeter
systems is the easy way of mounting and the un-
complicated way of starting up the operation. The
time needed to connect the wires and aligning the
optics is drastically reduced in comparison to stan-
dard Perimeter systems consisting of single beam
light barriers, where often mirrors are also included
which can only be positioned with difficulties.
The protective field and the active elements respec-
tively, are clearly recognized as black surfaces with
the integrated optical lenses. The not monitored
areas (passive elements) are also clearly indicated
as yellow surfaces.
4 0 0
9 0 0
Dist
an
ce
to
r
e
fe
re
n
ce
pla
n
e
[m
m
]
R e fe re n c e p la ne (e .g . g ro u nd )
0
CE
D
ES
CE
D
ES
300
1100
Di
st
an
ce
t
o
re
fe
re
n
ce p
lan
e [
m
m]
Referen ce p lan e (e.g . ground )
0
700
CE
D
ES
CE
D
ES
300
1200
Dist
anc
e to r
efe
ren
ce
p
la
ne [m
m
]
Reference plane (e.g. ground)
0
600
900
CE
D
ES
CE
D
ES
Figure 9: Perimeter systems (2-, 3- and 4-beams), accord. to EN
999 [1998]