Strain Gauge Converter KFD2-WAC2-1.D

• 1-channel er
• 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 outputs
• Programmable high/low alarm
• Configurable by PACTware or keypad
• RS-485 interface
• t detection (LFD)

This er provides the galvanic isolation between field circuits and control circuits. The device is used with strain gauges, load 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 Ds and a separate collective error message output. For additional information, refer to the manual and . Product Description

24 V DC

General specifications Supply Interface Field circuit Input Output Transfer characteristics Galvanic isolation Indicators/settings Directive conformity Conformity Ambient conditions Mechanical specifications International approvals General information

	Analog input
Connection	Power Rail or terminals 23+, 24-
Rated voltage	20 ... 35 V DC
Ripple	within the supply tolerance
Power consumption	max. 3 W
Connection	Power Rail or terminals 19+, 20 GND, 21-
Type	RS-485
Programming interface	programming socket
Connection	terminals 1+, 2-, 3+, 4-, 5+, 6-
Lead resistance	max. 25 &Omega, per
Input I
	Connection	terminals 1+, 2-
Sensor supply	1 ... 5 V
	Connection	terminals 3+, 4- (supply), 5+, 6- (r>
	Short-circuit current	50 mA
	Load	&ge, 116 &Omega, up to 5V, &ge, 85 &Omega, up to 4V
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	td>
	Input 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
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
	loading	253 V AC/2 A/500 VA/cos &, 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)
t 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
Deviation
	Resolution/accuracy	&le, ± 0.05 % incl. non- and hysteresis
	Temperature effect	&le, ± 0.01 %/K
Reaction time	300 ... 850 ms
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
Display LEDs , display
Control Control panel
Configuration	via operating buttons via PACTware
Labeling	space for labeling at the front
Electromagnetic compatibility
	Directive 2004/108/EC	EN 61326-1:2006
Low voltage
	Directive 2006/95/EC	EN 61010-1:2010
Electromagnetic compatibility	NE 21:2006
Degree of protection	IEC 60529:2001
Ambient temperature	-20 ... 60 °C (-4 ... 140 °F)
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
UL approval	E223772
Supplementary information	Observe the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see .