Wenglor SEFG Muting, Operating Instructions Manual

Page: 63 / 187

Safety Light Curtain 63
5.2.4.4 2-Sensor Linear Muting
The 2-sensor linear muting enables the user to transport an object out of the danger zone. The two MS are
located within the danger zone, so that it is not possible to activate the muting from outside the danger zone.
Muting is active as soon as MS1 and MS2 are activated. MS1 must be activated first, followed by MS2 within 4
seconds. The order must be observed here.
The distances a and b represent the distances between the muting object and a separating safeguard
(fence). They must be designed so that no one can enter the danger zone unnoticed while the muting object
is passing through the ESPE.
A sample arrangement of the sensors is shown in Figure 6 .
Danger zone
Figure 6: Arrangement 2-sensor linear muting
Calculating the minimum distance
d
1⁄2
≥ v × (t
ESPE
+t
MS
)
d
1
[m] Minimum distance between MS2 and safety field of the ESPE (see Figure 6)
d
2
[m] Minimum distance between MS1 and MS2 (see Figure 6 )
v [m/s] Speed of the material on the conveyor line
t
ESPE
[s] Processing time muting signals:
Is the time required by the ESPE for processing all muting signals. The value can be
found in the technical data
Section 4.1, page 15 .
t
MS
[s] Response time MS
a, b Distances