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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Magnetic reed switch  ->  EX-BN 20  ->  EX-BN 20-11RZ-3G/D
• 2 reed contacts
• Aluminium enlosure
• Long life
• 104 mm x 52 mm x 47 mm
• Non-contact principle
• 1 Reed contakts
• Actuating distance up to 50 mm depending on actuating magnet and version
• Screw connection
• Ex certified

Ordering details
Product type descriptionEX-BN 20-11RZ-3G/D
Article number101186630
EAN Code4030661333724
Approval EEX
Global Properties
Permanent lightEX-BN 20
StandardsEN 60079-0, EN 60079-15, EN 60079-31
Compliance with the Directives (Y/N) Yes
Active principleMagnetic drive
- Material of the housingslight alloy die-casting, painted
- Material of the active surfaceMetal film
Housing construction formrectangular
Recommended actuatorBP 10 N, BP 10 S, 2 x BP 10 N, 2 x BP 10 S, BP 15 N, 2 x BP 15/2, BP 15/2 N, BP 34 N, BP 34 S, BP 20, BP 20 N, BP 20 S, BP 31 N, BP 31 S, BP 11 N, BP 11 S, 2 x BP 11 N, 2 x BP 12 S, BP 21 N, BP 21 S, 2 x BP 21 N, 2 x BP 21 S, BE 20 N(S) ST 24VDC, BE 20 N(S) 48VDC
Mechanical data
Design of electrical connectionScrew connection
Cable cross-section of the cable glands
- Min. Cable cross-section of the cable glandsØ 6
- Max. Cable cross-section of the cable glandsØ 10
Mechanical life1.000.000.000 operations
Electrical lifetime1.000.000 … operations
Actuating planesActuation from side
Active arealateral
Switch distance Sn12 mm … 50 mm
- noticeActuating distance up to 50 mm depending on actuating magnet and version
Type of actuationMagnet
restistance to shock30 g / 11 ms
resistant to vibration50 g, on sine wave oscillation
Resistance to vibration10 … 55 HZ, Amplitude 1 mm
Bounce duration0,3 … 0,6
Latching (Y/N)No
Impact energymax. 4 J
bias magnet (Y/N)Yes
Actuating speedmax. 18 m/s
Switching point accuracy± 0,25 mm
Ambient conditions
Ambient temperature
- Min. environmental temperature−15
- Max. environmental temperature+70
Storage and transport temperature
- Min. Storage and transport temperature−25
- Max. Storage and transport temperature+70
Protection classIP67
Electrical data
Design of control elementbistable contact, Opener (NC) / Normally open contact (NO)
Number of snap-in contacts2
Switching time - Close0,3 - 1.5
Switching time - Openmax. 0,5 ms
Voltage typeAC, alternating current
Switch frequency
Dielectric strength> 600 VAC (50 HZ)
Switching voltagemax. 250 VAC/DC
Switching currentmax. 3 A
Switching capacitymax. 120 VA / W
Interference resistance to magnetic fields
Design of control outputReed contakts
LED switching conditions display
LED switching conditions display (Y/N)No
EX-markingEX II 3G Ex nC IIC T5 Gc X
EX II 3D Ex tc IIIC T90°C Dc X
Explosion protection categories for gasesATEX gas ex-protection, Cat. 3
Explosion protection Zones for gases2
Explosion protected category for dustsATEX dust ex-protection, Cat. 3
Explosion protection Zones for dusts22
Dimensions of the sensor
- Width of sensor104
- Height of sensor52
- Length of sensor47
The opening and closing functions depend on the direction of actuation, the actuating magnets and the polarity of the actuating magnets.
When the switches and actuators come together, the colours must coincide: Red (S) to red (S) and green (N) to green (N).
Included in delivery
Actuators must be ordered separately.
Ex-certified screwed cable gland

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 06.12.2019 - 22:58:22h Kasbase 3.3.0.F.64I