3.4 Sensing Distance
X
1
2
3
4
Figure 1. Actuation directions
The switching distances of the standard actuation direction 1 are listed. The distances noted are for a sensor working with
the standard actuators (SI-RF-A and SI-RF-A2).
Sensing Distance (Only in conjunction with actuator SI-RF-A)
Minimum
Typical
Maximum
Rated sensing distance
Sn
13 mm
Assured sensing distance - On
Sao
10 mm
Hysteresis
H
2 mm
Assured sensing distance - Off
Sar
25 mm
Within the detection range, there are "side lobes", in which the sensor
can also activate. In an application with actuation direction 3, maintain
a minimum distance X ≥ 5 mm between the SI-RF Safety Switch and
actuator to ensure there is no activation within the side lobes.
The specified sensing distances can only be reached if the following
conditions are met:
• Do not install the sensors near magnets or strong magnetic
fields.
• Do not flush mount the sensor and actuator to metallic
materials. Metal can influence the sensing distances.
Important: When multiple units are mounted next
to each other, there must be a minimum 100 mm
distance between each sensor to ensure trouble-
free operation.
ON
Offset S (mm)
Side lobe
Side lobe
OFF
Hysteresis
Distance S (mm)
Switch ON distance
Switch OFF distance
16.0
14.0
12.0
10.0
8.0
6.0
4.0
2.0
0.0
-40
-20
-30
-10
10
0
20
40
30
-2.0
Figure 2. Detection range
SI-RF Non-Contact RF Safety Switch
8
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