KEYENCE SL-V Series - Manual (Page 101)

3-8 System Configuration for the Muting Function
3-25
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SL-V-M-NO3-E
The following is an example of the muted condition while the workpiece is passing through the detection
area of the SL-V. In this example, 4 thru-beam photoelectric sensors are used as the muting devices (ON
when the beam is blocked). You can refer to this example if a workpiece can be distinguished from a per-
son because of the size of the workpiece.

Setup conditions
All 4 of the following conditions must be met in order to ensure the continuous muted condition while the
workpiece is passing through the detection area.
L (mm) : The length of workpiece
D1, D2, D3 (mm) : The spacing between sensors
V (mm/s)
: Workpiece speed
The activation time of muting input 1 and that of muting input 2 must be between 0.04 to 3 seconds.
(1) 0.04 < D1 / V < 3
(2) D2 < L
(3) D3 < L
(4) All of sensors A1, A2, B1 and B2 must turn ON when these beam is blocked (Dark ON).
Example: Muting function with 4 of muting devices
Sensor
A1
Sensor
A2
SL-V Sensor
B1
Sensor
B2
V
D1 D2
D3
L
Hazardous zone Safety zone
Receiver
Beam
axis
Movement
Transmitter
Workpiece