KEYENCE GL-RHG Series - Manual (Page 34)

2-5 Temporary Suspension of Safety Function
2-10 GL-RHG-M-NO2-E
Fu
nct
ion
s and
Feat
ures
2
Example: Muting function with 2 muting devices (Sensors)
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, 2 retro-reflective photoelectric sensors are used as the muting
devices (ON when the beam from the sensor is blocked).
 Conditions for installation of muting devices
All 4 of the following conditions must be met in order to ensure a continuous muted condition while the
workpiece is passing through the detection area.
L (mm) : Length of the workpiece
D (mm) : Displacement distance between the point where the workpiece first interrupts each beam.
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 < D / V < 3
(2) D < L
(3) Both sensor A1 and sensor A2 must be installed so that their beams intersect in the hazardous area.
(4) Both sensor A1 and sensor A2 must turn ON when the beam is blocked (Dark ON).
Workpiece
Sensor A2
Safety zone Hazardous zone
Receiver
Reflector
Reflector Sensor A1
Beam axis
Transmitter
GL-RHG
The beams from sensor
A1 and A2 must intersect
each other within the
hazardous zone.
L
V
D