Pepperl Fuchs KFD2-DWB-1.D Datasheet

Rotation Speed Monitor

2

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

						KFD2-DWB-1.D
+	400 Ω ≤ R ≤ 2 KΩ					10
	+	+	+	+	1	11	I
	10 KΩ	10 KΩ				12
-	-	-	-			16
					3	17	II
						18
				-		13+
					2
						14-

<![if ! IE]>

<![endif]>Release date: 2020-09-23 Date of issue: 2020-09-23 Filename: 231206_eng.pdf

	23+	24 V DC
	24-
ERR 24 V DC		ZONE 2
POWER RAIL		DIV. 2

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

Pepperl+Fuchs Group	USA: [phone]	Germany: [phone]	Singapore: [phone]	1
www.pepperl-fuchs.com	[e-mail]	[e-mail]	[e-mail]

Rotation Speed Monitor

KFD2-DWB-1.D

Dimensions

40

115
<![if ! IE]> <![endif]>7
<![if ! IE]> <![endif]>105	<![if ! IE]> <![endif]>119

Technical Data

		General specifications
		Signal type		Digital Input
		Functional safety related parameters
		Safety Integrity Level (SIL)		SIL 2
		Supply
		Connection		terminals 23+, 24or power feed module/Power Rail
		Rated voltage	Ur	20 ... 30 V DC
		Rated current	Ir	approx. 100 mA
		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
<![if ! IE]> <![endif]>eng.pdf_		Input resistance		4.7 kΩ
		Open circuit voltage/short-circuit current		22 V / 40 mA
<![if ! IE]> <![endif]>231206
		Switching point/switching hysteresis		logic 1: > 2.5 mA ; logic 0: < 1.9 mA
<![if ! IE]> <![endif]>Filename:		Pulse duration		> 50 µs
		Input frequency		0.001 ... 12000 Hz
<![if ! IE]> <![endif]>-09-23		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
<![if ! IE]> <![endif]>2020		Active/Passive		I > 4 mA (for min. 100 ms) / I < 1.5 mA
<![if ! IE]> <![endif]>issue:
		Open circuit voltage/short-circuit current		18 V / 5 mA
<![if ! IE]> <![endif]>of		Output
<![if ! IE]> <![endif]>Date
		Connection side		control side
<![if ! IE]> <![endif]>09- -23
		Connection		output I: terminals 10, 11, 12
<![if ! IE]> <![endif]>2020				output II: terminals 16, 17, 18
		Output I, II		signal, relay
<![if ! IE]> <![endif]>date:
		Contact loading		250 V AC / 2 A / cos φ ≥ 0.7 ; 40 V DC / 2 A
<![if ! IE]> <![endif]>Release
		Mechanical life		5 x 107 switching cycles

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

	Pepperl+Fuchs Group	USA: [phone]	Germany: [phone]	Singapore: [phone]	2
	www.pepperl-fuchs.com	[e-mail]	[e-mail]	[e-mail]