8
Operating instructions
Safety sensor
BNS 33S
EN
1.6 Warning about misuse
In case of inadequate or improper use or manipulations of the
safety switchgear, personal hazards or damage to machin-
ery or plant components cannot be excluded. The relevant
requirements of the standard EN 1088 must be observed.
1.7 Exclusion of liability
We shall accept no liability for damages and malfunctions resulting from
defective mounting or failure to comply with this operating instructions
manual. The manufacturer shall accept no liability for damages result-
ing from the use of unauthorised spare parts or accessories.
For safety reasons, invasive work on the device as well as arbitrary re-
pairs, conversions and modifications to the device are strictly forbidden;
the manufacturer shall accept no liability for damages resulting from
such invasive work, arbitrary repairs, conversions and/or modifications
to the device.
2. Product description
2.1 Ordering code
This operating instructions manual applies to the following types:
BNS 33S-12Z
➀
No.
Option
Description
➀
without LED
G
with LED
BPS 33S Actuator
2.2 Special versions
For special versions, which are not listed in the order code below 2.1,
these specifications apply accordingly, provided that they correspond to
the standard version.
2.3 Destination and use
The BNS 33S safety sensor is designed for application in safety circuits
and is used for monitoring the position of movable safety guards to
EN 1088 and IEC 60947-5-3. To actuate the safety sensors, only the
BPS 33S actuators can be used.
The safety switches are used for applications, in which the hazardous
situation is terminated without delay when the safety guard is opened.
Only the entire system consisting of the safety sensor (BNS 33S), the
actuator (BPS 33S) and the safety-monitoring module (AES, SRB)
meets the requirements of the standard IEC 60947-5-3.
Information for the selection of suitable safety-monitoring
modules can be found in the Schmersal catalogues or in the
online catalogue on the Internet: www.schmersal.net.
Technically, multiple safety sensors can be wired to one AES/SRB
safety-monitoring module. To connect multiple safety sensors (check
if authorised!), their NO contacts are wired in parallel and their NC
contacts in series. The Protect-IE-11 or -02 or PROTECT-PE-11 (-AN)
or -02 input expander module can be used to connect up to 4 safety
sensors with NC/NC or NC/NO contacts.
In case of series-wiring at SRB max. 1 sensor with LED
indication for U
N
.
Except for the Protect IE or Protect PE expander module, safety sen-
sors with LED must not be wired in series. The light intensity of the LED
highly decreases due to the series-wiring and the voltage could drop
below the minimum input voltage of the downstream safety-monitoring
module. Please observe that the diagnostic coverage could decrease
when multiple safety sensors are connected to one safety-monitoring
module.
The user must evaluate and design the safety chain in ac-
cordance with the relevant standards and the required safety
level.
If multiple safety components are wired in series, the Perfor-
mance Level to EN ISO 13849-1 will be reduced due to the
restricted error detection under certain circumstances.
The entire concept of the control system, in which the safety
component is integrated, must be validated to the relevant
standards.
2.4 Technical data
Standards:
IEC 60947-5-3, BG-GS-ET-14
Enclosure:
V4A stainless steel to DIN 1.3960
Protection class:
IP69K (to IEC/EN 60529)
Termination:
connecting cable LiYY (food-safe)
Connecting cable:
6 x 0.25 mm²
Operating principle:
magnetic
Actuator:
BPS 33S, coded
Limit distances:
assured switching distance s
ao
:
8 mm
assured switch-off distance s
ar
:
18 mm
Switching condition indication:
LED only with ordering suffix G
Rated insulation voltage U
i
:
- without LED:
125 VAC/DC
- with LED:
32 VAC/DC
Rated impulse withstand voltage U
imp
:
-without LED:
1.5 kV
-with LED:
0.8 kV
Schaltspannung:
-without LED:
max. 100 VAC/DC
-with LED:
max. 24 VDC
Switching current:
- without LED:
max. 250 mA
- with LED:
max. 10 mA
Switching capacity:
-without LED:
max. 3 W
-with LED:
max. 240 mW
Ambient temperature:
−25 °C ... +80 °C
Storage and transport temperature:
−25 °C ... +80 °C
Max. switching frequency:
5 Hz
Resistance to shock:
30 g / 11 ms
Resistance to vibration:
10 ... 55 Hz, amplitude 1 mm
2.5 Safety classification
Standards:
EN ISO 13849-1
B
10d
(NC/NO contact):
25,000,000
at max. 20 % contact load
Service life:
20 years
MTTF
B
d
x
x
h
s/h
3600
d
10d
op
op
op
n
0,1 x n
op
t
cycle
(Specifications can vary depending on the application-specific param-
eters h
op
, d
op
and t
cycle
as well as the load.)
An individual switch can be used in a category 3 or 4 architecture up to
PL e.
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