Mounting
Leuze electronic
RSL 410
51
Calculation of safety distance S
RO
for access over the vertical protective field
S
RO
[mm]
= Safety distance
K
[mm/s]
= Approach speed for point of operation guarding with approach reaction and normal
approach direction to the protective field (resolution 14 to 40 mm): 2000 mm/s
or 1600 mm/s, when S
RO
> 500 mm
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
RO
[mm]
= Additional distance in which a body part can move towards the protective device before
the protective device triggers.
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. With each
additional scan the response time t
a
increases by 40 ms. With K = 2000 mm/s approach speed this corre
-
sponds with an increase in the safety distance of 80 mm per additional scan. With K = 1600 mm/s it is
64 mm.
Select a response time t
a
of at least 80 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
.
Additional distance C
R0
for finger protection
The required finger protection is ensured here by an additional distance C, which depends on the safety
sensor resolution, in addition to the safety distance.
• Detection of an adult's hand:
• Resolution: 30 mm
• Additional distance C
RO
: 128 mm
• Arm detection:
• Resolution: 40 mm
• Additional distance C
RO
: 208 mm
Protective field contour and reference contour
With a vertical protective field, you must define at least two sides of the protective field contour as refer
-
ence contour. The objective is to monitor the position of the protective field with regard to its marginal area.
If the arrangement misaligns and the distance of the safety sensor to the reference surface changes as a
result, switch the safety-related switching outputs off.
S
RO
K T C
RO
+
=
