Mounting of the Safety System
Leuze electronic
TNT 35 und TNT 35/7-24V
13
T
N
T
35/
7-
24V
DEUTSCH
ENGLISH
FRANÇAIS
IT
ALIANO
ESPAÑO
L
NEDERLANDS
Application of the formula: S = K * T+C
Where:
This results in:
S = (1600 mm/s * (100 ms + 20 ms)) + 850 mm
S = 1042 mm
3.1.1
Multi-axle installation
For the safeguarding of hazardous areas, the level of desired protection and the number of
light beams are determined in IS0 13855 or through a risk analysis acc. to ISO 13849-1.
With multi-axle installation, parallel light beams always have to run in opposite directions.
Otherwise the light beams can cause mutual interference and disturb proper functioning.
Depending on the number of photoelectric sensor pairs, the single systems have to be
mounted at different heights acc. to IS0 13855. The number of needed systems results
from the corresponding type C standard or risk evaluation.
Deflection mirrors
A number of important factors have to be observed when using deflection mirrors:
• With any light beam deflection, a loss of operating range occurs. Per deflection mirror,
the loss is approx. 15 %.
• Contamination of the deflection mirrors should be avoided.
• Environmental conditions such as steams and dust-containing air heavily limit the
operating range.
• When installing deflection mirrors, the optical axis of the photoelectric sensor must be
centered to the mirror.
• A laser alignment aid made by Leuze, e.g. ARH 2 facilitates alignment over large
distances.
S = the minimum distance of the two-beam AOPD from the hazardous area
K = approach speed 1600 mm/s (IS0 13855)
T = sum of the system response time of the machine and response time of the AOPD
850 mm with multi-axle installation
Figure 3.1-2:
Multi-axle installation
T
R
T
R
T
R