Proximity Sensors

Inductive sensor NCN3-F31K-N4-K

Direct mounting on standard actuators
Fixed setting
EC-Type Examination Certificate TÜV99 ATEX 1479X
Usable up to SIL 2 acc. to IEC 61508
LEDs for switching state of sensor and solenoid valve
Valve LEDs disconnectable

NAMUR sensors must be operated with approved switch amplifiers. Please find suitable devices below:

Go to our Switch Amplifiers

Datasheet
Documents
CAD+CAE
Approvals+Certificates
Associated Products

Please note: All product-related documents, such as certificates, declarations of conformity, etc., which were issued prior to the conversion under the name Pepperl+Fuchs GmbH, also apply to Pepperl+Fuchs AG.

Download the complete datasheet as a PDF:

Datasheet excerpt: Technical data of NCN3-F31K-N4-K

General specifications
Switching function		2 x normally closed (NC)
Output type		NAMUR
Rated operating distance		3 mm
Installation		flush mountable
Assured operating distance		0 ... 2.4 mm
Actual operating distance		2.7 ... 3.3 mm typ.
Actuating element		Stainless steel 1.4305 / AISI 303 8.5 mm x 8.5 mm x 0.5 mm
Reduction factor r_Al		0.5
Reduction factor r_Cu		0.4
Reduction factor r₃₀₄		1
Reduction factor r_St37		1.3
Reduction factor r_Brass		0.6
Output type		2-wire
Nominal ratings
Nominal voltage		8 V
Switching frequency		0 ... 3 kHz
Hysteresis		typ. 5 %
Reverse polarity protection		reverse polarity protected
Short-circuit protection		yes
Suitable for 2:1 technology		yes , Reverse polarity protection diode not required
Current consumption
	Measuring plate not detected	≥ 3 mA
	Measuring plate detected	≤ 1 mA
Time delay before availability		≤ 1.1 ms
Switching state indicator		LED, yellow
Valve status indicator		LED, yellow
Functional safety related parameters
Safety Integrity Level (SIL)		SIL 2
MTTF_d		1470 a
Mission Time (T_M)		20 a
Diagnostic Coverage (DC)		0 %
Valve circuit
Voltage		max. 32 V DC
Current		max. 240 mA
Short-circuit protection		no
Reverse polarity protection		yes, with reversed output LED is out of function, therfore more power for solenoid valve
Compliance with standards and directives
Standard conformity
	NAMUR	EN 60947-5-6:2000 IEC 60947-5-6:1999
	Electromagnetic compatibility	NE 21:2007
	Standards	EN 60947-5-2:2007 EN 60947-5-2/A1:2012 IEC 60947-5-2:2007 IEC 60947-5-2 AMD 1:2012
Approvals and certificates
EAC conformity		TR CU 012/2011
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 ... 100 °C (-13 ... 212 °F)
Storage temperature		-40 ... 100 °C (-40 ... 212 °F)
Mechanical specifications
Connection (system side)		Cage tension spring terminals
Core cross-section (system side)		1.5/2.5 mm² flexible/rigid
Connection (valve side)		Cage tension spring terminals
Core cross-section (valve side)		1.5/2.5 mm² flexible/rigid
Housing material		PBT
Sensing face		PBT
Degree of protection		IP66 / IP67
Tightening torque, housing screws		1 Nm
Tightening torque, cable gland		M20 x 1.5 ; max. 7 Nm M12 x 1.5 ; max. 1.5 Nm
Note		LED switch-off
Data for application in connection with hazardous areas
Equipment protection level		Ga , Gb , Gc (ic) , Mb
Equipment protection level Ga
Type of protection		intrinsic safety
CE marking		[PD-Z02585A]
Certificates
	Appropriate type	NCN3-F31K-N4...
	ATEX certificate	TÜV 99 ATEX 1479 X
	ATEX marking	II 1G Ex ia IIC T6...T1 Ga
	Standards	EN 60079-0:2012+A11:2013 , EN 60079-11:2012
	IECEx certificate	IECEx TUN 17.0021X
	IECEx marking	Ex ia IIC T6...T1 Ga
	Standards	IEC 60079-0:2011 , IEC 60079-11:2011
Effective internal capacitance		max. 100 nF The value is applicable for one sensor circuit. A cable length of 10 m is considered.
Effective internal inductance		max. 100 µH The value is applicable for one sensor circuit. A cable length of 10 m is considered.
Maximum permissible ambient temperature		Also observe the maximum permissible ambient temperature stated in the general technical data. Keep to the lower of the two values.
	for ATEX	at U_i = 15 V , I_i = 25 mA , P_i = 34 mW , T6 : 55 °C (131 °F) T5 : 65 °C (149 °F) T4 : 95 °C (203 °F) T3 : 95 °C (203 °F) T2 : 95 °C (203 °F) T1 : 95 °C (203 °F) at U_i = 15 V , I_i = 25 mA , P_i = 64 mW , T6 : 55 °C (131 °F) T5 : 65 °C (149 °F) T4 : 95 °C (203 °F) T3 : 95 °C (203 °F) T2 : 95 °C (203 °F) T1 : 95 °C (203 °F) at U_i = 15 V , I_i = 52 mA , P_i = 169 mW , T6 : 45 °C (113 °F) T5 : 60 °C (140 °F) T4 : 85 °C (185 °F) T3 : 85 °C (185 °F) T2 : 85 °C (185 °F) T1 : 85 °C (185 °F)
	for IECEx	at U_i = 15 V , I_i = 25 mA , P_i = 34 mW , T6 : 70 °C (158 °F) T5 : 85 °C (185 °F) T4 : 100 °C (212 °F) T3 : 100 °C (212 °F) T2 : 100 °C (212 °F) T1 : 100 °C (212 °F) at U_i = 15 V , I_i = 25 mA , P_i = 64 mW , T6 : 70 °C (158 °F) T5 : 85 °C (185 °F) T4 : 100 °C (212 °F) T3 : 100 °C (212 °F) T2 : 100 °C (212 °F) T1 : 100 °C (212 °F) at U_i = 15 V , I_i = 52 mA , P_i = 169 mW , T6 : 65 °C (149 °F) T5 : 80 °C (176 °F) T4 : 90 °C (194 °F) T3 : 90 °C (194 °F) T2 : 90 °C (194 °F) T1 : 90 °C (194 °F)
Maximum values of the valve circuit		The value applies to each valve circuit. A cable length of 10 m is considered.
	Voltage	max. 32 V
	Current	max. 240 mA
	Internal capacitance	max. 10 nF
	Internal inductance	max. 20 µH
Equipment protection level Gb
Type of protection		intrinsic safety
CE marking		[PD-Z02585A]
Certificates
	Appropriate type	NCN3-F31K-N4...
	ATEX certificate	TÜV 99 ATEX 1479 X
	ATEX marking	II 1G Ex ia IIC T6…T1 Ga
	Standards	EN 60079-0:2012+A11:2013 , EN 60079-11:2012
	IECEx certificate	IECEx TUN 17.0021X
	IECEx marking	Ex ia IIC T6...T1 Ga
	Standards	IEC 60079-0:2011 , IEC 60079-11:2011
Effective internal capacitance		max. 100 nF The value is applicable for one sensor circuit. A cable length of 10 m is considered.
Effective internal inductance		max. 100 µH The value is applicable for one sensor circuit. A cable length of 10 m is considered.
Maximum permissible ambient temperature		Also observe the maximum permissible ambient temperature stated in the general technical data. Keep to the lower of the two values. at U_i = 15 V , I_i = 25 mA , P_i = 34 mW , T6 : 70 °C (158 °F) T5 : 85 °C (185 °F) T4 : 100 °C (212 °F) T3 : 100 °C (212 °F) T2 : 100 °C (212 °F) T1 : 100 °C (212 °F) at U_i = 15 V , I_i = 25 mA , P_i = 64 mW , T6 : 70 °C (158 °F) T5 : 85 °C (185 °F) T4 : 100 °C (212 °F) T3 : 100 °C (212 °F) T2 : 100 °C (212 °F) T1 : 100 °C (212 °F) at U_i = 15 V , I_i = 52 mA , P_i = 169 mW , T6 : 65 °C (149 °F) T5 : 80 °C (176 °F) T4 : 90 °C (194 °F) T3 : 90 °C (194 °F) T2 : 90 °C (194 °F) T1 : 90 °C (194 °F)
Maximum values of the valve circuit		The value applies to each valve circuit. A cable length of 10 m is considered.
	Voltage	max. 32 V
	Current	max. 240 mA
	Internal capacitance	max. 10 nF
	Internal inductance	max. 20 µH
Equipment protection level Gc (ic)
Type of protection		intrinsic safety
CE marking		[PD-Z02586A]
Certificates
	ATEX certificate	PF13CERT2895 X
	ATEX marking	II 3G Ex ic IIC T6…T1 Gc
	Standards	EN 60079-0:2012+A11:2013 , EN 60079-11:2012
Effective internal capacitance		max. 100 nF The value is applicable for one sensor circuit. A cable length of 10 m is considered.
Effective internal inductance		max. 100 µH The value is applicable for one sensor circuit. A cable length of 10 m is considered.
Maximum permissible ambient temperature		Also observe the maximum permissible ambient temperature stated in the general technical data. Keep to the lower of the two values. at U_i = 20 V , I_i = 25 mA , P_i = 34 mW , T6 : 70 °C (158 °F) T5 : 85 °C (185 °F) T4 : 100 °C (212 °F) T3 : 100 °C (212 °F) T2 : 100 °C (212 °F) T1 : 100 °C (212 °F) at U_i = 20 V , I_i = 25 mA , P_i = 64 mW , T6 : 70 °C (158 °F) T5 : 85 °C (185 °F) T4 : 100 °C (212 °F) T3 : 100 °C (212 °F) T2 : 100 °C (212 °F) T1 : 100 °C (212 °F) at U_i = 20 V , I_i = 52 mA , P_i = 169 mW , T6 : 65 °C (149 °F) T5 : 80 °C (176 °F) T4 : 90 °C (194 °F) T3 : 90 °C (194 °F) T2 : 90 °C (194 °F) T1 : 90 °C (194 °F)
Maximum values of the valve circuit		The value applies to each valve circuit. A cable length of 10 m is considered.
	Voltage	max. 32 V
	Current	max. 240 mA
	Internal capacitance	max. 10 nF
	Internal inductance	max. 20 µH
Equipment protection level Mb
Type of protection		intrinsic safety
CE marking		[PD-Z02585A]
Certificates
	Appropriate type	NCN3-F31K-N4...
	IECEx certificate	IECEx TUN 17.0021X
	IECEx marking	Ex ia I Mb
	Standards	IEC 60079-0:2011 , IEC 60079-11:2011
Effective internal capacitance		max. 100 nF The value is applicable for one sensor circuit. A cable length of 10 m is considered.
Effective internal inductance		max. 100 µH The value is applicable for one sensor circuit. A cable length of 10 m is considered.
Maximum permissible ambient temperature		Also observe the maximum permissible ambient temperature stated in the general technical data. Keep to the lower of the two values. at U_i = 15 V , I_i = 25 mA , P_i = 34 mW : 100 °C (212 °F) at U_i = 15 V , I_i = 25 mA , P_i = 64 mW : 100 °C (212 °F) at U_i = 15 V , I_i = 52 mA , P_i = 169 mW : 90 °C (194 °F)
Maximum values of the valve circuit		The value applies to each valve circuit. A cable length of 10 m is considered.
	Voltage	max. 32 V
	Current	max. 240 mA
	Internal capacitance	max. 10 nF
	Internal inductance	max. 20 µH
General information
Note		Inductive sensors for position feedback of standard drives with terminal identification / terminal assignment in accordance with the former DIN 45140 T1 available on request. Ask your contact person at Pepperl+Fuchs.
Use in the hazardous area		see instruction manuals

Documents: NCN3-F31K-N4-K

Instruction manuals	Language	File Type	File Size
Инструкции	BUL	PDF	0 KB
Návod k poużití	CZE	PDF	0 KB
Instruktions manual	DAN	PDF	136 KB
Instruction manual	ENG	PDF	141 KB
Kasutusjuhend	EST	PDF	131 KB
Käyttöohje	FIN	PDF	132 KB
Manuel d'instructions	FRA	PDF	141 KB
Betriebsanleitung	GER	PDF	142 KB
Οδηγίες χρήσης	GRE	PDF	148 KB
Handleiding	HOL	PDF	0 KB
Instruction manual / Betriebsanleitung	HRV	PDF	0 KB
Használati útmutató	HUN	PDF	0 KB
Manuale di istruzioni	ITA	PDF	0 KB
Lietošanas pamācība	LAV	PDF	0 KB
Instrukciju vadovas	LIT	PDF	0 KB
Instrukcja obsługi	POL	PDF	0 KB
Manual de instruções	POR	PDF	0 KB
Manual de utilizare	RON	PDF	138 KB
Návod na poużitie	SLK	PDF	137 KB
Navodila za uporabo	SLV	PDF	135 KB
Manual de instrucciones	SPA	PDF	138 KB
Manual	SWE	PDF	134 KB

CAD+CAE: NCN3-F31K-N4-K

CAD	File Type	File Size
3-D model in IGS format / 3-D-Modell im IGS-Format	IGS	3189 KB
3-D model in STP format / 3-D-Modell im STP-Format	STP	980 KB
CAD Portal / CAD Portal	LINK	---

Approvals+Certificates: NCN3-F31K-N4-K

Statements of compliance	Certificate No.	File Type	File Size
EU-Declaration of conformity / EU-Konformitätserklärung	DOC-1177B	PDF	248 KB
Certificates
Canada USA CSA Ordinary Location	1007121	PDF	99 KB
Canada USA UL Ordinary Location	20170306-E87056	PDF	407 KB
EU TUV Nord ATEX ia 2G, 1G, 1D s. certificate	TÜV 99 ATEX 1479 X	PDF	4682 KB
Europe Pepperl+Fuchs Certificate ATEX Category 3	PF13CERT2895X	PDF	1101 KB
Russia NANIO "CCVE"	TC RU C-DE.AA87.B.00394	PDF	3971 KB
Worldwide Pepperl+Fuchs Functional Safety Certificate	PF12CERT2382B	PDF	1649 KB
Worldwide TUV Nord IECEx ia	IECEx TUN 17.0021X	LINK	---

Associated Products: NCN3-F31K-N4-K

Matching system components

	BT115A Activator
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	BT115X Activator
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Accessories

	BT65A Activator
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	BT65X Activator
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General Notes Relating to Pepperl+Fuchs Product Information

Quick Links

Pepperl+Fuchs AG
Lilienthalstraße 200
68307 Mannheim
Germany
info@de.pepperl-fuchs.com
phone +49 621 776-0

Pepperl+Fuchs is a leading developer and manufacturer of electronic sensors and components for the global automation market. Continuous innovation, enduring quality, and steady growth have been the foundation of our success for more than 70 years. Pepperl+Fuchs employs 6,200 people worldwide and has manufacturing facilities in Germany, USA, Singapore, Hungary, Indonesia and Vietnam, most of them ISO 9001 certified.