KEYENCE GL-RHG Series - Manual (Page 35)

2-5 Temporary Suspension of Safety Function
2-11 GL-RHG-M-NO2-E
Fu
nct
ion
s and
Feat
ures
2
 Explanation
(1) The workpiece is approaching the
protective zone but the GL-RHG
does not go into the muted condi-
tion because both muting input 1
and 2 are OFF. At this point, the
GL-RHG continues normal opera-
tion and OSSD goes OFF if the
GL-RHG gets interrupted. Sensor A2
Safety zone Hazardous zone
Receiver
Reflector
Reflector Sensor A1
Beam axis
Transmitter
GL-RHG
Workpiece
Movement
(2) The workpiece interrupts the beam
from sensor A1 first, and then inter-
rupts the beam from sensor A2. The
GL-RHG then goes into the muted
condition and the OSSD does not
turn off even if the GL-RHG detects
an interruption. Sensor A2
Safety zone Hazardous zone
Receiver
Reflector
Reflector Sensor A1
Beam axis
Transmitter
GL-RHG
Workpiece
Movement
(3) The GL-RHG goes back to nor-
mal operation (not muted) if either
sensor A1 or sensor A2 turns off
as the workpiece passes. Sensor A2
Safety zone Hazardous zone
Receiver
Reflector
Reflector Sensor A1
Beam axis
Transmitter
GL-RHG
Workpiece
Movement