KEYENCE SL-R12EX - Manual (Page 25)

Chapter 2 Functions
2-9
2
ENGLISH
2-5-3 Four-input muting
The light curtain (SL-C Series) goes to the muting state when it received input signals from 4 muting devices,
and the FSD keeps ON-state no matter which beam axes of the SL-C Series is blocked.
The following time chart shows the muting function performance when four sensors are used as muting
devices.
Forward direction
Sensor A1
Sensor A2
Sensor B1
Sensor B2
Muting function
Beam reception
FSD
ON
OFF
Clear
Blocked
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Less than 3 sec.
Less than 3 sec.
20 ms
5 ms
150 ms
24 ms
(1) (2) (3)
Time chart explanation
(1) The muting function does not get active when the signals from the muting devices are all OFF. In other
words, the light curtain (SL-C Series) keeps normal operation. (The muting function is OFF)
(2) The muting function gets active once the signal from sensor A1 turns ON at first and the signal from
sensor A2 turns ON sequentially. At this time, the muting lamp turns ON. Further, the signal from sensor
B1 turns ON, and finally, the signal from sensor B2 turns ON. As long as the light curtain (SL-C Series)
receives the signals from the muting devices in this sequence, it keeps muting function.
(3) If the signal from sensor A1 turns OFF, A2 turns OFF and then B1 also turns OFF sequentially after the
signals from all the sensors turn ON, the muting function cannot keep active. Therefore, the light curtain's
(SL-C Series) muting state is canceled. The muting lamp turns OFF, and the light curtain (SL-C Series)
returns to normal operation.