Pepperl Fuchs KFD2-DWB-1.D Datasheet

Rotation Speed Monitor

2

KFD2-DWB-1.D

10
11
12

16
17
18

I

II

3

1

2

+

-

+

-

+

-

+

10 kΩ10 kΩ

400 Ω ≤ R ≤ 2 kΩ

-

+

-

24 V DC

23+
24-

Power Rail

24 V DCERR

13+
14-

Zone 2

Div. 2

Germany: [phone]Pepperl+Fuchs Group

Refer to "General Notes Relating to Pepperl+Fuchs Product Information".

USA: [phone] Singapore: [phone]

www.pepperl-fuchs.com [e-mail] [e-mail]

[e-mail]

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 61508/IEC 61511

<

24 V DC

Function

This signal conditioner monitors for an overspeed or underspeed condition of a digital signal (NAMUR sensor/ mechanical contact) by comparing
the input frequency to the user programmed reference frequency.
An overspeed or underspeed condition is signaled via the relay outputs. Line fault detection of the field circuit is indicated by a red LED, Power
Rail and relay. The startup override feature sets relay outputs to default conditions programmed by the user for up to 1,000 seconds.
The unit is easily programmed by the use of a keypad located on the front of the unit.
A unique collective error messaging feature is available when used with the Power Rail system.
For additional information, refer to the manual and www.pepperl-fuchs.com.

Connection

Release date: 2020-09-23 Date of issue: 2020-09-23 Filename: 231206_eng.pdf

1

115

119

40

105 7

Rotation Speed Monitor KFD2-DWB-1.D

Germany: [phone]Pepperl+Fuchs Group

Refer to "General Notes Relating to Pepperl+Fuchs Product Information".

USA: [phone] Singapore: [phone]

www.pepperl-fuchs.com [e-mail] [e-mail]

[e-mail]

Dimensions

Technical Data

General specifications

Signal type Digital Input

Functional safety related parameters

Safety Integrity Level (SIL) SIL 2

Supply

Connection terminals 23+, 24- or power feed module/Power Rail

Rated voltage U

Rated current I

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 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 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

Release date: 2020-09-23 Date of issue: 2020-09-23 Filename: 231206_eng.pdf

20 ... 30 V DC

r

approx. 100 mA

r

input II: terminals 13+, 14- start-up override;

output II: terminals 16, 17, 18

2