Estimated Lead Time : 4-6 Weeks
Manufacturer : Pepperl+Fuchs
NBN40-U1K-E2-3G-3D
Inductive sensor NBN40-U1K-E2-3G-3D
Sensor head bidirectional and rotatable
40 mm non-flush
3-wire DC
4 LEDs indicator for 360° visibility
ATEX-approval for zone 2 and zone 22
Output type : PNP
Rated operating distance : 40 mm
Installation : non-flush
Output polarity : DC
Assured operating distance : 0 ... 32.4 mm
Actual operating distance : 36 ... 44 mm typ. 40 mm
Reduction factor rAl : 0.31
Reduction factor rCu : 0.3
Reduction factor r304 : 0.74
Reduction factor rBrass : 0.39
Nominal ratings
Operating voltage : 10 ... 30 V DC
Switching frequency : 0 ... 150 Hz
Hysteresis : typ. 5 %
Reverse polarity protection : reverse polarity protected
Short-circuit protection : pulsing
Voltage drop : ≤ 2 V
Voltage drop at IL
Voltage drop IL = 1 mA, switching element on : 0.5 ... 2.3 V typ. 0.9 V
Voltage drop IL = 10 mA, switching element on : 0.8 ... 2.2 V typ. 1.4 V
Voltage drop IL = 20 mA, switching element on : 0.9 ... 2.3 V typ. 1.5 V
Voltage drop IL = 50 mA, switching element on : 0.9 ... 2.5 V typ. 1.6 V
Voltage drop IL = 100 mA, switching element on : 1 ... 2.6 V typ. 1.8 V
Voltage drop IL = 200 mA, switching element on : 1.2 ... 2.8 V typ. 2 V
Operating current : 0 ... 200 mA
Off-state current : 0 ... 0.5 mA typ. 0.01 mA
Off-state current TU=40 °C, switching element off : ≤ 100 μA
No-load supply current : ≤ 20 mA
Operating voltage indicator : LED, green
Switching state indicator : LED, yellow
Functional safety related parameters
MTTFd : 1358 a
Mission Time (TM) : 20 a
Diagnostic Coverage (DC) : 0 %
Approvals and certificates
FM approval : hazardous (classified) location
Non-incendive
UL approval : cULus Listed, General Purpose
CSA approval : cCSAus Listed, General Purpose
CCC approval : CCC approval / marking not required for products rated ≤36 V
Ambient conditions
Ambient temperature : -25 ... 85 °C (-13 ... 185 °F)
Mechanical specifications
Connection type : screw terminals
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 ferrule 0.5 mm2 , with connector sleeves 0.34 mm2
Maximum core cross-section : without wire end ferrule 2.5 mm2 , with connector sleeves 1.5 mm2
Housing material : PA/metal
Sensing face : PA
Degree of protection : IP68 / IP69K
Mass : 225 g
Note : Tightening torque: 1.8 Nm (housing)
Equipment protection level Gc (nA)
Certificate : PF 15CERT3754 X
: Special conditions
Protection against transients : Ensure transient protection is provided and that the maximum value of the transient protection (140% of 85 V) is not exceeded.
Equipment protection level Dc (tc)
: Instruction : Manual electrical apparatus for hazardous areas
: Device category 3D : for use in hazardous areas with combustible dust
Certificate : PF 15CERT3774 X
CE marking : [*PD-Z02586A*]
ATEX marking : 
II 3D Ex tc IIIC T80°C Dc
The Ex-related marking can also be printed on the enclosed label.
Standards : EN 60079-0:2012+A11:2013, EN 60079-31:2014
Protection by enclosure "tc" Some of the information in this instruction manual is more specific than the information provided in the datasheet.
General : The corresponding datasheets, declarations of conformity, EC-type examination certificates, certifications, and control drawings, where applicable (see datasheets), form an integral part of this document. These documents can be found at www.pepperl-fuchs.com. The maximum surface temperature of the device was determined without a layer of dust on the apparatus. Some of the information in this instruction manual is more specific than the information provided in the datasheet.
Installation, commissioning : Laws and/or regulations and standards governing the use or intended usage goal must be observed. If the Ex-relevant identification is printed exclusively on the adhesive label provided, this label must be affixed in the immediate vicinity of the sensor! The background surface to which the adhesivelabel is to be applied must be clean and free from grease! The applied label must be durable and remain legible, with due consideration of the possibility of chemical corrosion! After opening the housing, you should check that the seal is in the correct position and is clean and intact before closing the housing again.
Maintenance : No changes can be made to apparatus, which are operated in hazardous areas.
Repairs to these apparatus are not possible. After opening the housing, you should check that the seal is in the correct position and is clean and intact before closing the housing again.
: Special conditions
Maximum operating current IL : The maximum permissible load current must be restricted to the values given in the following list.
High load currents and load short-circuits are not permitted.
Maximum operating voltage UBmax : The maximum permissible operating voltage UBmax must be restricted to the values given in the following list. Tolerances are not permitted.
Maximum permissible ambient temperature TUmax : dependant of the load current IL and the max. operating voltage UBmax
Information can be taken from the following list.
at UBmax=30 V, IL=200 mA : 50 °C (122 °F)
at UBmax=30 V, IL=100 mA : 53 °C (127.4 °F)
at UBmax=30 V, IL=50 mA : 54 °C (129.2 °F)
Protection from mechanical danger : The sensor must not be exposed to ANY FORM of mechanical danger.
Protection from UV light : The sensor and the connection cable must be protected from damaging UV-radiation. This can be achieved when the sensor is used in internal areas.
Electrostatic charge : Sliding contact discharges must be avoided. Avoid electrostatic charges that can cause electrostatic discharge when installing or operating the device. Information on electrostatic hazards can be found in the technical specification IEC/TS 60079-32-1. Do not attach the nameplate provided in areas where electrostatic charge can build up.
Lead insertion : If cable glands are required for the installation then the following points must be observed: The cable glands must be certified in accordance with the application. The temperature range of the cable glands must be selected according to the application. The degree of protection must not be reduced by the cable glands. Seal the housing. Use a seal that meets the requirements of the application.
Plug connector : The plug connector must not be withdrawn under voltage. The proximity switch is identified as follows: "WARNING - DO NOT SEPARATE WHEN ENERGIZED". With the plug connector disconnected, soiling of the internal area must be prevented.(i.e. the area that is inaccessible when the connector is inserted)
General information
Use in the hazardous area : see instruction manuals
Category : 3G; 3D
Shipping Weight: 1.5 kg
