KEYENCE GL-RHG Series - Manual (Page 37)

2-5 Temporary Suspension of Safety Function
2-13 GL-RHG-M-NO2-E
Fu
nct
ion
s and
Feat
ures
2
Example: Muting function with 4 muting devices
The following is an example of the muted condition while the workpiece is passing through the detection
area of the GL-RHG. In this example, 4 thru-beam photoelectric sensors are used as the muting devices
(ON when the beam is blocked).
 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) : Length of the 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 the beam is blocked (Dark ON).
Workpiece
Sensor
A1
Safety zone Hazardous zone
GL-RHG
Receiver
Beam
axis
Transmitter
L
V
D1
Sensor
A2
Sensor
B1
Sensor
B2
D2
D3
Movement