Strain Gauge Converter KFD2-WAC2-1.D

1-channel signal conditioner 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 Line fault detection (LFD) 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&rsquo,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 . Product Description 24 V DC General specifications Signal type Analog input Supply Connection Power Rail or terminals 23+, 24- Rated voltage 20 ... 35 V DC Ripple within the supply tolerance Power consumption max. 3 W Interface Connection Power Rail or terminals 19+, 20 GND, 21- Type RS-485 Programming interface programming socket Field circuit Connection terminals 1+, 2-, 3+, 4-, 5+, 6- Lead resistance max. 25 &Omega, 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 &ge, 116 &Omega, up to 5V, &ge, 85 &Omega, 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 M&Omega, 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-, 8+, 9- Output I, II Relay output Contact loading 253 V AC/2 A/500 VA/cos &phi, 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 &Omega, Analog voltage output 0 ... ± 10 V, output resistance 500 &Omega, (bridge between terminal 7 and 9) Analog current output 0 ... ± 20 mA or 4 ... 20 mA, load 0 ... 550 &Omega, (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 &le, ± 0.05 % incl. non-linearity and hysteresis Temperature effect &le, ± 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 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 Output III/Input II, III not available Output III/Programming socket not available Other circuits from each other functional insulation, rated insulation voltage 50 Veff Indicators/settings Display elements LEDs , display Control elements Control panel Configuration via operating buttons via PACTware Labeling space for labeling at the front Directive conformity Electromagnetic compatibility Directive 2004/108/EC EN 61326-1:2006 Low voltage Directive 2006/95/EC 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 International approvals UL approval E223772 General information Supplementary information Observe the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see .