Pepperl Fuchs KFD2-DWB-1.D

Rotation Speed Monitor

MPN: KFD2-DWB-1.D
Category: K-System (DIN Rail Mounting, Highly Functional)

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What is the Pepperl Fuchs KFD2-DWB-1.D?

1-channel signal conditioner

24 V DC supply (Power Rail)

Dry contact or NAMUR inputs

Input frequency 1 mHz ... 12 kHz

2 relay contact outputs

Start-up override

Configurable by keypad

Line fault detection (LFD)

Up to SIL 2 acc. to IEC/EN 61508 / IEC/EN 61511

1-channel signal conditioner, 24 V DC supply (Power Rail), Dry contact or NAMUR inputs, Input frequency 1 mHz ... 12 kHz, 2 relay contact outputs, Start-up override, Configurable by keypad, Line fault detection (LFD), Up to SIL 2 acc. to IEC/EN 61508 / IEC/EN 61511, Housing width: 40 mm, Number of channels: 1-channel, Trip relay, Start-up override, Rotation speed monitoring, Safety Integrity Level (SIL): SIL 2, Rated voltage: 20 ... 30 V DC, Field device: NAMUR sensor, Field device [2]: volt-free contact

Specifications

General specifications

Order code (Pepperl+Fuchs part number)	231206
Signal type	Digital Input
Lifecycle	Active (current Pepperl+Fuchs product)

Functional safety related parameters

Safety Integrity Level (SIL)

SIL 2

Supply

Connection	terminals 23+, 24- or power feed module/Power Rail
Rated voltage	20 ... 30 V DC Ur
Rated current	approx. 100 mA Ir
Power dissipation/power consumption	≤ 1.8 W / 1.8 W

Input

Connection side	field side
Connection	Input I: 2-wire sensor: terminals 1+, 3- three wire sensor: terminals 1+, 2- and 3 input II: terminals 13+, 14- start-up override;
Input I	2- or 3-wire sensor, sensor acc. to EN 60947-5-6 (NAMUR) or mechanical contact
Open circuit voltage/short-circuit current	22 V / 40 mA
Input resistance	4.7 kΩ
Switching point/switching hysteresis	logic 1: > 2.5 mA ; logic 0: < 1.9 mA
Pulse duration	> 50 µs
Input frequency	0.001 ... 12000 Hz
Line fault detection	breakage I ≤ 0.15 mA; short-circuit I > 4 mA
Input II	startup override: 1 ... 1000 s, adjustable in steps of 1 s
Active/Passive	I > 4 mA (for min. 100 ms) / I < 1.5 mA
Open circuit voltage/short-circuit current	18 V / 5 mA

Output

Connection side	control side
Connection	output I: terminals 10, 11, 12 output II: terminals 16, 17, 18
Output I, II	signal, relay
Contact loading	250 V AC / 2 A / cos φ ≥ 0.7 ; 40 V DC / 2 A
Mechanical life	5 x 107 switching cycles
Energized/De-energized delay	approx. 20 ms / approx. 20 ms
Collective error message	Power Rail

Transfer characteristics

Input I: Measuring range	0.001 ... 12000 Hz
Input I: Resolution	0.1 % of measured value , ≥ 0.001 Hz
Input I: Accuracy	0.1 % of measured value , > 0.001 Hz
Input I: Measuring time	< 100 ms
Input I: Influence of ambient temperature	0.003 %/K (30 ppm)
Output I, II: Response delay	≤ 200 ms

Galvanic isolation

Input I/other circuits	reinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 Veff
Output I, II against eachother	reinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 Veff
Output I, II/other circuits	reinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 Veff
Start-up override/power supply and collective error	functional insulation acc. to IEC 62103, rated insulation voltage 50 Veff

Indicators/settings

Display elements	LEDs , display
Control elements	Control panel
Configuration	via operating buttons
Labeling	space for labeling at the front

Directive conformity

Electromagnetic compatibility: Directive 2014/30/EU	EN 61326-1:2013 (industrial locations)
Low voltage: Directive 2014/35/EU	EN 61010-1:2010

Conformity

Electromagnetic compatibility	NE 21:2006
Degree of protection	IEC 60529:2001

Ambient conditions

Ambient temperature

-20 ... 60 °C (-4 ... 140 °F)

Mechanical specifications

Degree of protection	IP20
Connection	screw terminals
Mass	300 g
Dimensions	40 x 119 x 115 mm (1.6 x 4.7 x 4.5 inch) (W x H x D) , housing type C2
Height	119 mm
Width	40 mm
Depth	115 mm
Mounting	on 35 mm DIN mounting rail acc. to EN 60715:2001

Data for application in connection with hazardous areas

Certificate	PF 08 CERT 1216 X
Marking	II 3G Ex nA nC IIC T4 Gc
Output I, II: Contact loading	50 V AC/2 A/cos φ > 0.7; 40 V DC/1 A resistive load
Ambient conditions: Ambient temperature	-20 ... 50 °C (-4 ... 122 °F)
Directive conformity: Directive 2014/34/EU	EN 60079-0:2012+A11:2013 , EN 60079-15:2010

International approvals

UL approval

E223772

General information

Supplementary information

Observe the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see www.pepperl-fuchs.com.

Downloads & documentation

Official documents from Pepperl Fuchs, downloaded directly from the manufacturer.

Data sheets & manuals

CAD & dimension drawings

Certificates (4)

KFD2-DWB-1.D: frequently asked questions

When can KFD2-DWB-1.D be shipped?

KFD2-DWB-1.D is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.

Can I pick up KFD2-DWB-1.D in person?

Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.

Is express delivery available?

Yes — mention it when you request a quote for KFD2-DWB-1.D and we'll include express shipping options in our reply.

My factory is down and I need this urgently — can you help?

For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for KFD2-DWB-1.D, subject to availability and destination.