3
EX-BNS 33-…-2187
Operating instructions
Safety sensor
EN
3. Mounting
3.1 General mounting instructions
• Fitting is only authorised in a de-energised condition
• Do not use the sensor and the actuator as a mechanical backstop
• Any mounting position, provided that the active surfaces are opposite
• Inseparably fix the safety sensor and the actuator to the safety guard
• Ensure the safety sensor is mounted on a flat surfaces to avoid tensile
stresses that could damage the sensor or lead to varying switching
distances
• Do not install the safety sensor and the actuator in strong magnetic
fields
• If possible, do not mount the sensor and the actuator on ferromagnetic
material. Otherwise, the following variations of the switching distances
may be expected: A distance of 0…5 mm from the mounting surface
to the ferromagnetic material: switching distance is only approx. 40 %
of the original switching distance; A distance of 5…8 mm: approx.
80 % of the original switching distance; > 10 mm: no change
(use spacer BN 31/33). The use of non-magnetic fixing screws is
recommended also.
• Do not subject the safety sensor and actuator to extreme vibrations
and shocks.
• Keep away from metal chips
• The mounting distance between two sensors should always be at
least 50 mm.
Please observe the specifications for the maximum impact
energy in the technical data.
Safety sensor and actuator must be permanently fitted to the
safety guards and protected against displacement by suitable
measures (tamperproof screws, gluing, drilling of the screw
heads).
3.2 Dimensions
All measurements in mm.
Safety sensor with cable
88
78
25
7
3,5
18,5
7,5
6,5
1000
4,5
LED
ø 5
13
3
Actuator
88
78
25
7
3,
5
18
,5
13
3
4,5
ø
5
Spacer
8,
5
7
3,
5
10
25
88
78
18
,5
13
ø 5
3.3 Axial misalignment
A horizontal and vertical misalignment of the safety sensor and the
actuator is tolerated. The possible misalignment depends on the
distance of the active surfaces of the sensor and the actuator.
The sensor remains active within the tolerance range.
The specified switching distances refer to opposedly mounted safety
sensors and actuators. Different arrangements are possible, however
this may lead to different switching distances.
0
1
2
3
4
5
3
4
5
5,5
6
6
5,
5
5
4
2
Assured switching distance: s
ao
= 5 mm
Assured switch-off distance: s
ar
= 15 mm
3.4 Adjustment
If the central marking of the actuator is within the represented
base position area, a release signal is given at the connected
safety-monitoring module.
15
15
15
0
6
6
3
3
5
4
B
A
Key
A = Base position area (sensor actuated, release)
B = Switch-off area
(at the latest point, all Reed contacts are not actuated)
The LED can only be used as rough setting tool. The correct
functionality of both safety channels must be checked by means of the
connected safety-monitoring module.