Protection Against Simple Defeating - Reer PI SQ F-NF Manual De Instrucciones

Material
Stainless steel
AIMg3G22
AI 99 %
CuZn37
Copper
* Typical values for damping with a reference target of 45 x 45 x 1 mm and non-flush installa-
tion to IEC 60947-5-2 at an ambient temperature of 20 °C.
Depending on the characteristics of the damping element there may be no
close zone.

5.2 Protection against simple defeating

The fail-safe sensor reacts to metal objects, e.g. the frame of a safety door. Other
metal objects that are not intended to enable the sensor must not be allowed to
enable the fail-safe sensor unintentionally.
► Take measures to prevent metal objects, except the designated target,
from being placed on the sensing face or in the enable zone unintention-
ally.
In addition, the sensor has the following switching characteristics to make simple
defeating of its safety function more difficult:
1. By slowly introducing a metallic object into the enable zone, the outputs are
immediately switched, but displayed by the LED with a delay of approx. 3 s (→
9.2.1 Delayed switching of the LED). By doing so, the object is generally in the
close range before the LED indication is lit. The technical instructions concern-
ing the restart of the installation must be observed.
2. If the object remains in the close zone for over approx. 2 s, the outputs are
completely disabled and no longer enabled in case of damping in the enable
zone. If the object stays in the close range for longer than approx. 5 s, the set-
ting aid is activated (→ 8.1).
Release of the enable zone can be carried out
• either by undamping (> 30 mm) for a time of more than 2 s
• or by a voltage interruption
(→ 8.3 Deactivate setting aid).
Enable zone
7.5...13.2 mm
2.0...5.8 mm
1.4...5.0 mm
2.3...6.2 mm
0.8...4.3 mm
UK
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