Mounting
Leuze electronic
RSL 410
48
1
Scan level
Figure 7.10: Mounting beside one another, without height offset, crossed alignment
1
Scan level
Figure 7.11: Mutually opposing mounting, without height offset, crossed alignment
7.2
Stationary danger zone guarding
The safety sensor takes over the stop-activating and presence-detecting function.
Calculation of safety distance S for parallel approach to the protective field
S
[mm]
= Safety distance
K
[mm/s]
= Approach speed for danger zone guarding with approach direction parallel to the pro
-
tective field (resolution up to 90 mm): 1600 mm/s
T
[s]
= Total time of the delay, sum from (t
a
+ t
i
+ t
m
)
t
a
[s]
= Response time of the protective device
t
i
[s]
= Response time of the safety relay
t
m
[s]
= Machine stopping time
C
[mm]
= Additional distance for danger zone guarding with approach reaction H = height of the
protective field, H
min
= minimum installation height permitted, but no smaller than 0,
d = resolution of the protective device C = 1200 mm - 0.4
H; H
min
= 15
(d - 50)
Response times, stopping time of the machine
The safety sensor's rotary mirror rotates on its own axis every 40 ms. One revolution is a scan. At least
two consecutive scans must be interrupted so that the safety-related switching outputs switch off. The
safety sensor's minimum response time is therefore 80 ms.
If you want to increase the safety sensor's availability in an environment with fine particles, increase the
number of interrupted scans after which the safety-related switching outputs switch off. With each addi
-
tional scan the response time t
a
increases by 40 ms. With K = 1600 mm/s the safety distance increases by
64 mm per additional scan.
Select a response time t
a
of at least 120 ms or higher.
Determine the machine/system's stopping time t
m
.
If data is not available, you can commission Leuze electronic to perform measurements; see chapter 14
If an increase in the stopping time within the regular test periods is to be expected, take an additional
time into account for the machine's stopping time t
m
.
1
1
1
1
S
K T C
+
=
