Pepperl Fuchs NCN3-F31K-N4-K Data Sheet

Inductive sensor NCN3-F31K-N4-K

Technical Data

General specifications

Switching function 2 x normally closed (NC)
Output type NAMUR
Rated operating distance sn3 mm
Installation flush mountable
Assured operating distance sa0 ... 2.4 mm

0102

Model Number

NCN3-F31K-N4-K

Features

• Direct mounting on standard actuators

• Compact and stable housing with
terminal compartment connection

• 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

Application

Note

The connections to this sensor are sealed
with stopping plugs to protect against dirt and
moisture. If not all of the connections are
used in your application, then seal the remai­ning stopping plugs on the sensor perma­nently or check during initial installation and
when performing regular maintenance work
that the stopping plugs are secure and imper­meable. If necessary, tighten the stopping
plugs to a torque of 1 Nm.

Accessories

BT65A

Activator for F31 series

BT65X

Activator for F31 series

Actual operating distance s
Actuating element Stainless steel 1.4305 / AISI 303

Reduction factor r
Reduction factor rCu 0.4
Reduction factor r
Reduction factor r
Reduction factor r
Output type 2-wire

Nominal ratings

Nominal voltage Uo8 V
Switching frequency f 0 ... 3 kHz
Hysteresis H 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

Measuring plate detected
Time delay before availability t
Switching state indicator LED, yellow
Valve status indicator LED, yellow

Functional safety related parameters

Safety Integrity Level (SIL) SIL 2
MTTFd 1470 a
Mission Time (T
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

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 mm
Connection (valve side) Cage tension spring terminals
Core cross-section (valve side) 1.5/2.5 mm
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 ; ≤ 7 Nm

Note LED switch-off

General information

Note Inductive sensors for position feedback of standard drives with

Use in the hazardous area see instruction manuals

Compliance with standards and
directives

Standard conformity

NAMUR

Electromagnetic compatibility

Standards

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

0.5

Al

1

304

1.3

St37

0.6

Brass

) 20 a

M

2.7 ... 3.3 mm typ.

r

8.5 mm x 8.5 mm x 0.5 mm

≥ 3 mA
≤ 1 mA
≤ 1.1 ms

v

power for solenoid valve

2

flexible/rigid

2

flexible/rigid

M12 x 1.5 ; ≤ 3 Nm

terminal identification / terminal assignment in accordance with the
former DIN 45140 T1 available on request. Ask your contact person
at Pepperl+Fuchs.

EN 60947-5-6:2000
IEC 60947-5-6:1999
NE 21:2007
EN 60947-5-2:2007
EN 60947-5-2/A1:2012
IEC 60947-5-2:2007
IEC 60947-5-2 AMD 1:2012

Release date: 2018-04-19 08:14 Date of issue: 2018-04-19 222680_eng.xml

Refer to “General Notes Relating to Pepperl+Fuchs Product Information”.

1

Inductive sensor NCN3-F31K-N4-K

Dimensions

65

I

40

35

95

9

II

14 11

5.4

M20 x 1.5

S

M12 x 1.5

77.5
LED

7

Electrical Connection

N4-K

I

I

II

S

V

V

LED

30

I

II

4

5
1

2
9 / 10
10 / 9

7 / 6

6 / 7

L+
L­L+
L-

(V-)

V+

(V+)

V-

(V+)

V­V+

(V-)

Interruption of LED:
In the case of a polarity reversal of the
valve circuit connection/s, the valve
status display does not function, i.e.
such that low power valves can (also) be
connected.

Release date: 2018-04-19 08:14 Date of issue: 2018-04-19 222680_eng.xml

Refer to “General Notes Relating to Pepperl+Fuchs Product Information”.

2