Pepperl Fuchs KFD2-WAC2-Ex1.D-Y1 Technical Data

Strain Gauge Converter

KFD2-WAC2-Ex1.D-Y1

10
11
12
16
17
18

3+
5+

1+
2-

6­4-

7­8+
9-

14­15+

13+

I

II

III

RS 485

24 V DC

23+
24-

20

GND

21-

19+

Power Rail

RS 485 24 V DCERR

mA

Zone 0, 1, 2
Div. 1, 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-WAC2-Ex1.D-Y1

1-channel isolated barrier

<

24 V DC supply (Power Rail)

<

Strain gauge input (full or half bridge)

<

Output 0 mA ... ± 20 mA or 0 V ... ± 10 V

<

2 relay contact outputs

<

Programmable high/low alarm

<

Configurable by PACTware or keypad

<

RS-485 interface

<

Low response time

<

Line fault detection (LFD)

<

Function

This isolated barrier is used for intrinsic safety applications.
The device is used with strain gauges, load cells and resistance measuring bridges.
Designed to provide 5 V excitation voltage, this barrier’s high quality A/D converter allows it to be used with those devices requiring 10 V.
Up to four 350 Ω strain gauges connected in parallel may be powered and evaluated.
The device is easily configured by the use of keypad or with the PACTware configuration software.
The current measurement for tare, zero point, and final value can be entered in this manner.
A fault is signalized by LEDs and a separate collective error message output.
For additional information, refer to the manual and www.pepperl-fuchs.com.

Connection

Technical Data

General specifications

Signal type Analog input

Supply

Connection Power Rail or terminals 23+, 24­Rated voltage U
Ripple within the supply tolerance
Power consumption max. 3 W

Interface

Connection Power Rail or terminals 19+, 20 GND, 21-

Release date: 2020-09-23 Date of issue: 2020-09-23 Filename: 231222_eng.pdf

r

20 ... 35 V DC

1

Strain Gauge Converter KFD2-WAC2-Ex1.D-Y1

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]

Technical Data

Type RS-485
Programming interface programming socket

Field circuit

Connection terminals 1+, 2-, 3+, 4-, 5+, 6­Lead resistance max. 25 Ω per line
Input I

Connection terminals 1+, 2-

Sensor supply 1 ... 5 V

Connection terminals 3+, 4- (supply); 5+, 6- (signal)
Short-circuit current 50 mA
Load ≥ 116 Ω up to 5V, ≥ 85 Ω up to 4V

Input

Connection side field side
Connection Input I: terminals 1+, 2-; Input II: terminals 13+, 14-; Input III: terminals 15+, 14­Programmable Tare 0 ... 500 % of span
Input I Signal, analog

Input signal -100 ... 100 mV
Input resistance > 1 MΩ for voltage measurement

Input II, III tare adjustment, calibration and zero

Open circuit voltage/short-circuit current 18 V / 5 mA
Active/Passive I > 4 mA/I < 1.5 mA

Output

Connection side control side
Connection Output I: terminals 10, 11, 12; Output II: terminals 16, 17, 18; Output III: terminals 7-,

Output I, II Relay output

Contact loading 253 V AC/2 A/500 VA/cos φ min. 0.7; 40 V DC/2 A resistive load
Mechanical life 2 x 107 switching cycles

Output III Analog output

Current range -20 ... 20 mA
Load max. 550 Ω
Analog voltage output 0 ... ± 10 V; output resistance 500 Ω (bridge between terminal 7 and 9)

Analog current output 0 ... ± 20 mA or 4 ... 20 mA; load 0 ... 550 Ω (terminals 7 and 8)
Line fault detection downscale -21.5 mA (-10.75 V) or 2 mA (1 V), upscale 21.5 mA (10.75 V)
Collective error message Power Rail

Transfer characteristics

Deviation

Resolution/accuracy ≤ ± 0.2 % incl. non-linearity and hysteresis

Temperature effect ≤ ± 0.01 %/K
Reaction time 150 ms

Galvanic isolation

Input I/other circuits reinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 V
Output I, II against eachother reinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 V
Output I, II/other circuits reinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 V
Output III/Input II, III not available
Output III/Programming socket not available
Other circuits from each other functional insulation, rated insulation voltage 50 V

Indicators/settings

Display elements LEDs , display
Control elements Control panel
Configuration via operating buttons

Labeling space for labeling at the front

Directive conformity

Release date: 2020-09-23 Date of issue: 2020-09-23 Filename: 231222_eng.pdf

8+, 9-

eff

via PACTware

eff

eff

eff

2

Strain Gauge Converter KFD2-WAC2-Ex1.D-Y1

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]

Technical Data

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 approx. 250 g
Dimensions 40 x 119 x 115 mm (1.6 x 4.7 x 4.5 inch) , housing type C3
Mounting on 35 mm DIN mounting rail acc. to EN 60715:2001

Data for application in connection with hazardous areas

EU-type examination certificate TÜV 04 ATEX 2531

Marking 1 II (1)G [Ex ia Ga] IIC

Supply Power Rail or terminals 23+, 24- non-intrinsically safe

Maximum safe voltage U
Input I terminals 1+, 2- Ex ia IIC, Ex iaD

Voltage U

Current I

Power P

o

o

o

Input II and III terminals 13+, 14-; 15+, 14- non-intrinsically safe

Maximum safe voltage U

m

Output I, II terminals 10, 11, 12; 16, 17, 18 non-intrinsically safe

Maximum safe voltage U

Contact loading 253 V AC/2 A/500 VA/cos φ min. 0.7; 40 V DC/2 A resistive load
Output III terminals 7-, 8+, 9- non-intrinsically safe

Maximum safe voltage U

m

Interface RS 485 programming jack

Maximum safe voltage U
Galvanic isolation

Input I/other circuits safe electrical isolation acc. to IEC/EN 60079-11, voltage peak value 375 V
Directive conformity

Directive 2014/34/EU EN 60079-0:2012+A11:2013 , EN 60079-11:2012

International approvals

FM approval

Control drawing 116-0302 (cFMus)
UL approval E223772
IECEx approval

IECEx certificate IECEx TUN 06.0005

IECEx marking [Ex ia Ga] IIC , [Ex ia Da] IIIC , [Ex ia Ma] I

General information

Supplementary information Observe the certificates, declarations of conformity, instruction manuals, and manuals

Accessories

Optional accessories - power feed module KFD2-EB2(.R4A.B)(.SP)

Release date: 2020-09-23 Date of issue: 2020-09-23 Filename: 231222_eng.pdf

1 II (1)D [Ex ia Da] IIIC
1 I (M1) [Ex ia Ma] I

40 V DC (Attention! Um is no rated voltage.)

m

14 V
238 mA
833 mW (linear characteristic)

40 V DC (Attention! Um is no rated voltage.)

253 V AC / 40 V DC (Attention! Um is no rated voltage.)

m

U

40 V DC (Attention! Um is no rated voltage.)

m

40 V DC (Attention! Um is no rated voltage.)

m

where applicable. For information see www.pepperl-fuchs.com.

- universal power rail UPR-05(-S)

- profile rail K-DUCT-BU(-UPR-05)

- FDT framework PACTware 5.X

- device type manager DTM Interface Technology

- adapter K-ADP-USB

3

ESC

OK

KFD2-WAC2­Ex1.D-Y1

RS232

PWR

1 2

ERR

OUT

19 21

15

9

13

7

20

14

8

22 24

18

12

16

10

23

17

11

132 465

Front view

Removable terminals
green

Removable terminals
blue

Keypad

LC display

LED green:
Power supply

Programming jack

Place for labeling

LED red:
Fault signal

LED yellow:
Output II

LED yellow:
Output I

Strain Gauge Converter KFD2-WAC2-Ex1.D-Y1

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]

Assembly

Accessories

DTM Interface
Technology

PACTware 5.X FDT Framework

KFD2-EB2 Power Feed Module

KFD2-EB2.R4A.B Power feed module, redundant supply

KFD2-EB2.R4A.B.SP Power feed module with spring terminals, redundant supply

KFD2-EB2.SP Power feed module with spring terminals

UPR-05 Universal Power Rail with end caps and cover, 5 conductors, length: 2 m

UPR-05-S Universal Power Rail with end caps and cover, 5 conductors, length: 0.8 m

K-DUCT-BU

K-DUCT-BU-UPR-05 Profile rail with UPR-05- * insert, 5 conductors, wiring comb field side blue

K-ADP-USB

Release date: 2020-09-23 Date of issue: 2020-09-23 Filename: 231222_eng.pdf

4

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]

Strain Gauge Converter

KFD2-WAC2-Ex1.D-Y1

Application

Single or parallel connection of strain gauges with resulting resistance between 116  ... 10 k can be connected and will
provide a 4 mA ... 20 mA output and 2 relay outputs as well as an RS 485 interface in the safe area.

The device supports the transmission of measured values via the RS 485 interface. In this mode of operation, input signal range
may be transmitted with 26 Bit resolution with up to 31 signal converters connected to the Power Rail UPR-05 or via terminals 19,
20 and 21.

RS 485 communication may be done via the Power Rail when using power feed modules with bus access, e. g. KFD2­EB2.R4A.B or via the terminals 19, 20 and 21 of one module. The device is addressed via keypad and display or with a PC with
PACTware and adapter K-ADP-USB.

For additional information, refer to the manual and www.pepperl-fuchs.com.

Release date: 2020-09-23 Date of issue: 2020-09-23 Filename: 231222_eng.pdf

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