1
Inductive sensor NJ4-12GK-N
Release date: 2011-07-28 14:05 Date of issue: 2011-07-28 106413_eng.xml
Germany: +49 621 776-4411
Subject to modifications without notice
Pepperl+Fuchs Group
www.pepperl-fuchs.comfa-info@pepperl-fuchs.com
USA: +1 330 486 0001
fa-info@us.pepperl-fuchs.com
Singapore: +65 6779 9091
fa-info@sg.pepperl-fuchs.com
Copyright Pepperl+Fuchs
Dimensions
Technical Data
General specifications
Switching element function NAMUR, NC
Rated operating distance sn 4 mm
Installation not embeddable
Output polarity NAMUR
Assured operating distance sa 0 ... 3.24 mm
Reduction factor rAl 0.4
Reduction factor rCu 0.3
Reduction factor r303 0.85
Nominal ratings
Nominal voltage Uo 8.2 V (Ri approx. 1 kΩ)
Switching frequency f 0 ... 1500 Hz
Current consumption
Measuring plate not detected ≥ 3 mA
Measuring plate detected ≤ 1 mA
Ambient conditions
Ambient temperature -25 ... 100 °C (-13 ... 212 °F)
Mechanical specifications
Connection type cable PVC , 2 m
Core cross-section 0.34 mm2
Housing material PBT
Sensing face PBT
Protection degree IP66 / IP68
General information
Use in the hazardous area see instruction manuals
Category 2G; 1D
Compliance with standards and directives
Standard conformity
NAMUR EN 60947-5-6:2000
IEC 60947-5-6:1999
Standards EN 60947-5-2:2007
IEC 60947-5-2:2007
Approvals and certificates
FM approval
Control drawing 116-0165F
UL approval cULus Listed, General Purpose
CSA approval cCSAus Listed, General Purpose
CCC approval Products with a maximum operating voltage of ≤36 V do not bear a
CCC marking because they do not require approval.
M12x1
4
30,5
34
17
0102
Model Number
NJ4-12GK-N
Features
• 4 mm not embeddable
• Usable up to SIL2 acc. to IEC 61508
Connection
Accessories
BF 12
Mounting flange, 12 mm
BN
L+
LBU
Inductive sensor NJ4-12GK-N
2
Release date: 2011-07-28 14:05 Date of issue: 2011-07-28 106413_eng.xml
Germany: +49 621 776-4411
Subject to modifications without notice
Pepperl+Fuchs Group
www.pepperl-fuchs.comfa-info@pepperl-fuchs.com
USA: +1 330 486 0001
fa-info@us.pepperl-fuchs.com
Singapore: +65 6779 9091
fa-info@sg.pepperl-fuchs.com
Copyright Pepperl+Fuchs
ATEX 2G
Instruction Manual electrical apparatus for hazardous areas
Device category 2G for use in hazardous areas with gas, vapour and mist
Directive conformity 94/9/EG
Standard conformity EN 60079-0:2006, EN 60079-11:2007
Ignition protection "Intrinsic safety"
Use is restricted to the following stated conditions
CE symbol 0102
Ex-identification ¬ II 2G Ex ia IIC T6
EC-Type Examination Certificate PTB 00 ATEX 2048 X
Appropriate type NJ 4-12GK-N...
Effective internal capacitance Ci ≤ 45 nF ; a cable length of 10 m is considered.
Effective internal inductance Li ≤ 50 μH ; a cable length of 10 m is considered.
General The apparatus has to be operated according to the appropriate data in the data
sheet and in this instruction manual. The EC-Type Examination Certificate has to
be observed. The special conditions must be adhered to!
Directive 94/9/EG and hence also EC-Type Examination Certificates apply in general
only to the use of electrical apparatus under atmospheric conditions.
The use in ambient temperatures of > 60 °C was tested with regard to hot surfaces
by the mentioned certification authority.
If the equipment is not used under atmospheric conditions, a reduction of the permissible
minimum ignition energies may have to be taken into consideration.
Highest permissible ambient temperature The temperature ranges, according to temperature class, are given in the EC-Type
Examination Certificate.
Installation, Comissioning Laws and/or regulations and standards governing the use or intended usage goal
must be observed. The intrinsic safety is only assured in connection with an appropriate
related apparatus and according to the proof of intrinsic safety.
Maintenance No changes can be made to apparatus, which are operated in hazardous areas.
Repairs to these apparatus are not possible.
Special conditions
Protection from mechanical danger When used in the temperature range below -20 °C the sensor should be protected
from knocks by the provision of an additional housing.
Inductive sensor NJ4-12GK-N
3
Release date: 2011-07-28 14:05 Date of issue: 2011-07-28 106413_eng.xml
Germany: +49 621 776-4411
Subject to modifications without notice
Pepperl+Fuchs Group
www.pepperl-fuchs.comfa-info@pepperl-fuchs.com
USA: +1 330 486 0001
fa-info@us.pepperl-fuchs.com
Singapore: +65 6779 9091
fa-info@sg.pepperl-fuchs.com
Copyright Pepperl+Fuchs
ATEX 1D
Instruction Manual electrical apparatus for hazardous areas
Device category 1D for use in hazardous areas with combustible dust
Directive conformity 94/9/EG
Standard conformity IEC 61241-11:2002: draft; prEN61241-0:2002
type of protection intrinsic safety "iD"
Use is restricted to the following stated conditions
CE symbol 0102
Ex-identification ¬ II 1D Ex iaD 20 T 108 °C (226.4 °F)
The Ex-relevant identification may also be printed on the accompanying adhesive
label.
EC-Type Examination Certificate ZELM 03 ATEX 0128 X
Appropriate type NJ 4-12GK-N...
Effective internal capacitance Ci ≤ 45 nF ; a cable length of 10 m is considered.
Effective internal inductance Li ≤ 50 μH ; a cable length of 10 m is considered.
General The apparatus has to be operated according to the appropriate data in the data
sheet and in this instruction manual.
The EC-Type Examination Certificate has to be observed.
The special conditions must be adhered to!
Maximum housing surface temperature The maximum surface temperature of the housing is given in the EC-Type Examination
Certificate.
Installation, Comissioning Laws and/or regulations and standards governing the use or intended usage goal
must be observed.
The intrinsic safety is only assured in connection with an appropriate related
apparatus and according to the proof of intrinsic safety.
The associated apparatus must satisfy at least the requirements of category ia IIB
or iaD. Because of the possibility of the danger of ignition, which can arise due to
faults and/or transient currents in the equipotential bonding system, galvanic isolation
in the power supply and signal circuits is preferable. Associated apparatus without
electrical isolation must only be used if the appropriate requirements of IEC
60079-14 are met.
The intrinsically safe circuit has to be protected against influences due to lightning.
When used in the isolating wall between Zone 20 and Zone 21 or Zone 21 und
Zone 22 the sensor must not be exposed to any mechanical danger and must be
sealed in such a way, that the protective function of the isolating wall is not
impaired. The applicable directives and standards must be observed.
If the Ex-relevant identification is exclusively printed on the included adhesive label,
this must be applied in the direct vicinity of the sensor! The surface to which the
label is to applied must be clean and free from grease! The applied adhesive label
must be durable adlegible to protect it against the possibility of chemical corrosion!
Maintenance No changes can be made to apparatus, which are operated in hazardous areas.
Repairs to these apparatus are not possible.
Special conditions
Electrostatic charging
The connection cables are to be laid in accordance with EN 50281-1-2 and must not
normally be subjected to chaffing during use.
