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Inductive sensor NBB20-U4-UU

Inductive proximity sensor

Inductive sensor NBB20-U4-UU

  • Sensor head bidirectional and rotatable
  • NO/NC selectable
  • Comfort series
  • Metal base with ground connection
  • Product Detail

Datasheet excerpt: Technical data of  NBB20-U4-UU

General specifications
Switching function Normally open/closed (NO/NC)
Output type Two-wire
Rated operating distance 20 mm
Installation flush
Output polarity AC/DC
Assured operating distance 0 ... 16.2 mm
Actual operating distance 18 ... 22 mm
Reduction factor rAl 0.4
Reduction factor rCu 0.3
Reduction factor r304 0.77
Reduction factor rFe 1
Reduction factor rBrass 0.43
Output type 2-wire
Nominal ratings
Switching frequency AC, 0 ... 30 Hz
DC, 0 ... 100 Hz
Hysteresis 1 ... 10 typ. 5 %
Reverse polarity protection reverse polarity tolerant
Short-circuit protection pulsing
Voltage drop ≤ 5 V (typ. 2V) DC operation
≤ 8 V (typ. 3 V) AC operation
Momentary current
(20 ms, 0.1 Hz)
0 ... 3000 mA
Operating current 5 ... 500 mA
Rated operating current 500 mA 50/60 Hz
Lowest operating current 5 mA
Off-state current ≤ 1.5 mA
Usage category AC12 , AC140 , DC12 , DC13
Time delay before availability ≤ 300 ms
Operating voltage indicator LED, green
Switching state indicator LED, yellow
Error indicator flashes when overcurrent
Functional safety related parameters
MTTFd 540 a
Mission Time (TM) 20 a
Diagnostic Coverage (DC) 0 %
Electrical specifications
Rated operating voltage 24 ... 250 V DC / 24 ... 230 V AC
Operating voltage 20 ... 275 V DC / 20 ... 253 V AC
Compliance with standards and directives
Standard conformity
Standards EN IEC 60947-5-2
Approvals and certificates
Protection class I
Rated insulation voltage 250 V
Rated impulse withstand voltage 2.5 kV
UL approval cULus Listed, General Purpose
CCC approval Ue 75VDC - 250VDC Ue 75VAC - 230VAC
Ambient conditions
Ambient temperature -25 ... 85 °C (-13 ... 185 °F)
Storage temperature -25 ... 85 °C (-13 ... 185 °F)
Pollution degree 3
Mechanical specifications
Connection type terminal compartment
Information for connection A maximum of two conductors with the same core cross section may be mounted on one terminal connection!
tightening torque 1.2 Nm + 10 %
Core cross section up to 2.5 mm2
Minimum core cross-section without wire end ferrules 0.5 mm2 , with connector sleeves 0.34 mm2
Maximum core cross-section without wire end ferrules 2.5 mm2 , with connector sleeves 1.5 mm2
Housing material PA 6.6 / metal
Sensing face PA 6.6
Housing base metal / class I equipment with ground connection
Degree of protection IP67
Mass 280 g
Dimensions
Height 40 mm
Width 40 mm
Length 118 mm
Note Tightening torque: 1.8 Nm (housing)

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