3
BNS 250
Operating instructions
Safety sensor
EN
3.2 Dimensions
All measurements in mm.
Safety sensor
33
22
13
2
5
10
0
0
¤
4
,5
19
8,7
Actuator
33
22
2
5
19
13
8,7
ø
4
,5
Spacer
33
22
2
5
19
13
8,7
ø
4
,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.
0
1
2
3
4
2
3
2
1,5
2
,5
3
3
,5
3
,5
BPS 250
Assured switching distance:
s
ao
= 4 mm
3 mm (ordering suffix -2205)
Assured switch-off distance:
s
ar
= 14 mm
8 mm (ordering suffix -2205)
3.4 Adjustment
Recommended Adjustment
Align the safety sensor and actuator at a distance
of 0.5 x s
ao
.
For setting the distance between the sensor and the actuator, the
BNS 250-11ZG and BNS 250-12ZG are equipped with a LED. The LED
of the BNS 250 variants can only be used as a rough setting tool. As
the LED is integrated in the NO circuit of the safety sensor and since
under certain operational circumstances or due to tolerances, the case
may happen that both outputs in the safety sensor do not operate ex-
actly simultaneously, the LED cannot be the only criterion for a correct
adjustment. The proper functionality must always be checked by means
of the connected safety-monitoring module.
4. Electrical connection
4.1 General information for electrical connection
The electrical connection may only be carried out by autho-
rised personnel in a de-energised condition.
The safety sensors must be wired in accordance with the wire colours
or the pin configuration.
4.2 Contact variants
The contact position shows the actuated sensor function when the safe-
ty guard is closed. For safety sensors with LED, the LED is illuminated
when the safety guard is open.
BNS 250-11Z
BNS 250-11Z-2205
BNS 250-12Z
BK 13
WH 21
14 BU
22 BN
BK 22
WH 32
14 BU
C BN
BNS 250-11ZG
BNS 250-11ZG-2205
BNS 250-12ZG
BK 13
WH 21
14 BU
22 BN
BK 22
WH 32
14 BU
C BN
BNS 250-11Z-LST-2530-1
1
2 3 4
S21
S13
S22
S14
(Component with cable and connector M12, no cULus approval)