Notes Switch travel diagram
  Contact closed
  Contact open
  Setting range
  Break point
  Positive opening sequence/- angle
VS  adjustable range of NO contact
  adjustable range of NC contact
N   after travel
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Safety sensors  ->  BNS-B20  ->  BNS-B20-12zG-ST-L
• Thermoplastic enclosure
• Non-contact safety switch
• Does not protrude into the door opening
• 119,5 mm x 140 mm x 43,3 mm
• Substitutes door-handle and safety switch, no further door fittings required
• Modern and symmetric design
• Tamper-proof because of integral coded safety sensor
• Ergonomic operation
• Suitable for hinged and sliding guards
• No protruding actuator
• Simple mounting with 4 Screws
• Connector M12 x 1, 8-pole

Preferred typ
Ordering details
Product type descriptionBNS-B20-12ZG-ST-L
Article number101177733
EAN Code4030661309187
Approval BG
StandardsEN ISO 13849-1
B10d Normally-closed contact/Normally open contact (NC/NO)25.000.000
- noticeat max. 20% contact load
Mission time20 Years
Global Properties
Permanent lightBNS-B20
StandardsIEC 60947-5-3, BG-GS-ET-14
Compliance with the Directives (Y/N) Yes
- Material of the housingsPlastic, glass-fibre reinforced thermoplastic
Coding available (Y/N)Yes
Monitoring function of downstream devices (Y/N)No
Prerequisite evaluation unit
Recommended safety-monitoring module
Recommended actuatorBNS-B20-B01
Mechanical data
Design of electrical connectionConnector M12
mechanical installation conditionsquasi-flush
Ensured switch distance ON Sao0 mm
Ensured switch distance OFF Sar22 mm
Type of actuationMagnet
restistance to shock30 g / 11 ms
Resistance to vibration10 … 55 HZ, Amplitude 1 mm
Latching force100 N
Door hingeleft
Max. door weight
- sliding guard3
- hinged guard5
Ambient conditions
Ambient temperature
- Min. environmental temperature−25 °C
- Max. environmental temperature+70 °C
Storage and transport temperature
- Min. Storage and transport temperature−25 °C
- Max. Storage and transport temperature+70 °C
Protection classIP67
Electrical data
Integrated Safety monitoring module available (Y/N)No
Cross circuit/short circuit recognition possible (Y/N)Yes
Voltage typeVDC
Switch frequencymax. 5 HZ
Switching voltagemax. 24 VDC
Switching currentmax. 10 mA
Switching capacitymax. 240 mW
Design of control output
Number of shutters1
Number of openers2
Design of output signal switching device
Electrical data - Safety outputs
Number of secure semi-conductor outputs0
Number of secure outputs with contact2
Electrical data - Diagnostic output
Number of semi-conductor outputs with signaling function0
Number of outputs with signaling function that already have a contact1
LED switching conditions display
LED switching conditions display (Y/N)Yes
- The LED is illuminated when the guard is closed.
Explosion protection categories for gasesNone
Explosion protected category for dustsNone
Dimensions of the sensor
- Width of sensor119.5 mm
- Height of sensor140 mm
- Length of sensor43.3 mm
Contact symbols shown for the closed condition of the guard device.
The contact configuration for versions with or without LED is identical.
Inductive loads (e.g. contactors, relays, etc.) are to be suppressed by means of a suitable circuit.
Contact S21-S22 must be integrated in the safety circuit
Included in delivery
Actuators must be ordered separately.

Note Diagram
  positive break NC contact
  no active
  Normally-open contact
  Normally-closed contact

K.A. Schmersal GmbH & Co. KG, Möddinghofe 30, D-42279 Wuppertal
The data and values have been checked throroughly. Technical modifications and errors excepted.
Generiert am 19.09.2019 - 16:50:12h Kasbase 3.3.0.F.64I