Pepperl Fuchs KFD2-WAC2-1.D Technical Data

Strain Gauge Converter

KFD2-WAC2-1.D

10
11
12
16
17
18

3+
5+

1+
2-

6­4-

7­8+
9-

I

II

III

RS 485

24 V DC

23+
24-

20

GND

21-

19+

Power Rail

RS 485 24 V DCERR

14­15+

13+

mA

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-WAC2-1.D

1-channel signal conditioner

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24 V DC supply (Power Rail)

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Strain gauge input (full or half bridge)

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

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2 relay contact outputs

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Programmable high/low alarm

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Configurable by PACTware or keypad

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RS-485 interface

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Line fault detection (LFD)

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24 V DC

Function

This signal conditioner provides the galvanic isolation between field circuits and control circuits.
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+, 24-

Rated 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: 231223_eng.pdf

r

20 ... 35 V DC

1

Strain Gauge Converter KFD2-WAC2-1.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]

Technical Data

Type RS-485

Programming interface programming socket

Field circuit

Connection terminals 1+, 2-, 3+, 4-, 5+, 6-

Lead 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+, 14-

Programmable 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 ≤ ± 0.05 % incl. non-linearity and hysteresis

Temperature effect ≤ ± 0.01 %/K

Reaction time 300 ... 850 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: 231223_eng.pdf

8+, 9-

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via PACTware

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