2
Operating instructions
Safety sensor
EX-BNS 33
EN
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
resulting from the use of unauthorised spare parts or accessories.
For safety reasons, invasive work on the device as well as arbitrary
repairs, 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:
EX-BNS 33-
➀
Z
➁
-3G/D
No.
Option
Description
➀
11
1 NO contacts / 1 NC contacts
12
1 NO contact / 2 NC contact
➁
without LED
G
with LED
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 Purpose
The safety sensor can be used for monitoring the position of movable
guards and flaps in explosion-endangered areas of Zone 2 and 22
category 3GD. Installation and maintenance requirements to the
standard series EN 60079 must be met. For the actuation of the safety
sensors, only the EX-BPS 33 actuator 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.
The safety switchgears are classified according to
ISO 14119 as type 4 interlocking devices.
Only the entire system consisting of the safety sensor (EX-BNS), the
actuator (EX-BPS) and the safety-monitoring module (AES/SRB/AZR)
meet the requirements of the standard IEC 60947-5-3.
Conditions for safe operation
Due to their specific impact energy, the components must be fitted
with a protection against mechanical stresses. The specific ambient
temperature range must be observed. The user must provide for a
protection against the permanent influence of UV rays. The energy
restriction for LED versions (24 V/10 mA) must be ensured by the user.
The user must evaluate and design the safety chain in
accordance with the relevant standards and the required
safety level.
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
Equipment category:
L
II 3GD
Ex protection:
- EX-BNS 33:
Ex nC IIC T6 Gc X;
Ex tc IIIC T80°C Dc X
- EX-BPS 33:
Ex h IIC T6 Gc;
Ex h IIIC T80°C Dc
Standards:
IEC 60947-5-3, EN 60079-0, EN 60079-15,
EN 60079-31, EN 13463-1, ISO 80079-36, ISO 80079-37,
BG-GS-ET-14
Design:
rectangular
Enclosure:
glass-fibre reinforced thermoplastic
Max. impact energy:
1 J
Protection class:
IP67 to IEC 60529
Connection:
Boflex cable
Cable section:
4 x 0.25 mm²
Operating principle:
magnetic
Actuating magnet:
EX-BPS-33, coded
Coding level according to ISO 14119:
low
assured switching distance s
ao
:
5 mm
assured switch-off distance s
ar
:
15 mm
Switching condition indication:
LED only with ordering suffix G
Switching voltage max.:
without LED: 100 VAC / DC
with LED: 24 VDC
Switching current max.:
without LED: 400 mA
with LED: 10 mA
Switching capacity max.:
without LED: 10 W
with LED: 240 mW
Ambient temperature:
−25 °C ... +70 °C
Storage and transport temperature:
−25 °C ... +70 °C
Repeat accuracy R:
≤ 0.1 x s
ao
Max. switching frequency:
ca. 5 Hz
Resistance to shock:
30 g / 11 ms
Resistance to vibration:
10 ... 55 Hz, amplitude 1 mm
2.5 Safety classification
Standards:
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
(Determined values can vary depending on the application-specific
parameters 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.
If multiple safety components are wired in series, the Performance
Level to ISO 13849-1 will be reduced due to the restricted error
detection under certain circumstances.
