Pepperl+Fuches KFD2-ER-Ex1.W.LB Conductive Switch Amplifier, 1-channel isolated barrier, 24 V DC supply (Power Rail).
This isolated barrier is used for intrinsic safety applications. It provides the AC measuring voltage for the level sensing electrodes.
Once the measured medium reaches the electrodes, the unit reacts by energizing a form C changeover relay contact.
The module is voltage and temperature stabilized and guarantees a defined switching characteristic.
It can be used for on/off control or minimum/maximum control. A signal delay feature is available and is adjustable between 0.5 s and 10 s.
This module can also monitor the field circuit for lead breakage (LB). LB is indicated by a red LED. If LB monitoring is selected, output II serves as the fault signal output; otherwise, it will follow the function of output I.
Technical Data
General specifications
Signal type Digital Input
Supply
Connection Power Rail or terminals 14+, 15-
Rated voltage Ur 20 ... 30 V DC
Rated current Ir 30 ... 40 mA
Input
Connection side field side
Connection terminals 1 (mass), 2 (min), 3 (max)
Control input min./max. control system: terminals 1, 2, 3
on/off control system: terminals 1, 3
Response sensitivity 1 ... 150 kĪ© , adjustable via potentiometer
Output
Connection side control side
Connection terminals 7, 8, 9; 10, 11, 12
Switching power max. 192 W , 2000 VA
Output signal ; relay
Contact loading 253 V AC/2 A/cos Ļ > 0.7; 40 V DC/2 A resistive load
Time constant for signal damping 0.5 s, 2 s, 5 s, 10 s
Galvanic isolation
Input/Output reinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 Veff
Input/power supply reinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 Veff
Output/power supply reinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 Veff
Indicators/settings
Display elements LEDs
Control elements DIP switch
potentiometer
Configuration via DIP switches
via potentiometer
Labeling space for labeling at the front
Directive conformity
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 Ā°C (-4 ... 140 Ā°F)
Mechanical specifications
Degree of protection IP20
Connection screw terminals , max. 2.5 mm2
Mass approx. 150 g
Dimensions 20 x 119 x 115 mm (0.8 x 4.7 x 4.5 inch) (W x H x D) , housing type B2
Mounting on 35 mm DIN mounting rail acc. to EN 60715:2001
Data for application in connection with hazardous areas
EU-type examination certificate DMT 00 ATEX E 033
Marking 1 II (1)G [EEx ia] IIC [circuit(s) in zone 0/1/2]
Input [EEx ia] IIC
Voltage Uo 10 V
Current Io 2.5 mA
Power Po 6 mW
Supply
Maximum safe voltage Um 40 V DC (Attention! Um is no rated voltage.)
Output
Contact loading 253 V AC/2 A/cos Ļ > 0.7; 40 V DC/2 A resistive load
Galvanic isolation
Input/Output safe electrical isolation acc. to IEC/EN 60079-11, voltage peak value 375 V
Input/power supply 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
