F71
Useful 8-unit detection
Optical transmission-type Anti
Interference feature
The Anti Interference feature prevents false operation
due to mutual interference even if up to 8 units are
installed adjacently.
Anti Interference for up to 4
sensors (response time: 250
μ
s)
Anti Interference for up to 8 sensors
(response time: 500
μ
s, turbo function
enabled)
Mutual interference
prevented by optical transmission
when more than one unit is adjacently installed.
Light transmitted
Light received
ON
OFF
ON
OFF
ON
OFF
Normal operation (NOR)
On delay (ON.D)
Off delay (OFF.D)
120%
Activation level
Received light level
Detection output
Stability output
Stability indicator
Flashes
Easy-to-understand stability function
When four consecutive detections with a received light level of
120% or lower of the activation level have occurred, the stability
output is activated. At the same time, the stability indicator flashes
an alert.
Timer operation
A delay timer of about 40 ms is provided to allow for a
range of input conditions of the connected devices.
The timer is also useful for stabilization of detection output
such as canceling signal chattering.
Turbo function increases detecting distance
by 30%
When it is desirable to increase the detecting distance for
the current condition of use, enabling the turbo function
allows a distance increase of about 30%.
8
4
8
4
Up 30%
13
Fiber
o
ptic
sensors