SMART Current Driver KFD2-SCD2-Ex1.LK PEPPERL FUCHS

SMART Current Driver KFD2-SCD2-Ex1.LK PEPPERL FUCHS

·1-channel isolated barrier
·24 V DC supply (Power Rail)
·Current output up to 650 Ω load
·HART I/P and valve positioner
·Line fault detection (LFD)
·Accuracy 0.1 %
·SIL 2 (SC 3) acc. to IEC/EN 61508
SMART Current Driver KFD2-SCD2-Ex1.LK PEPPERL FUCHS

Function
This isolated barrier is used for intrinsic safety applications.

The device drives SMART I/P converters, electrical valves, and positioners in hazardous areas.
Digital signals are superimposed on the analog values at the field side or control side and are transferred bi-directionally.

Current transferred across the DC/DC converter is repeated at terminals 1 and 2. Terminals 2 and 3 are used when no short circuit detection is required.
An open or short field circuit presents a high impedance to the control side to allow alarm conditions to be monitored by the control system.
If the HART communication resistance in the loop is too low, the internal resistance can be used.
Test sockets for the connection of HART communicators are integrated into the terminals of the device.
A fault is signalized by LEDs and a separate collective error message output.
SMART Current Driver KFD2-SCD2-Ex1.LK PEPPERL FUCHS

Technical Data
General specifications
Signal type                                      Analog output
Functional safety related parameters
Safety Integrity Level (SIL)                SIL 2
Systematic capability (SC)                  SC 3
Supply
Connection                                       Power Rail or terminals 14+, 15-
Rated voltage                        Ur        19 ... 30 V DC
Ripple                                              ≤ 10 %
SMART Current Driver KFD2-SCD2-Ex1.LK PEPPERL FUCHS

Technical Data
Rated current Ir                                        ≤ 30 mA at 24 V
Power dissipation                                     ≤ 600 mW at 20 mA and 500 Ω load
Power consumption                                  ≤ 700 mW
Input
Connection side                                        control side
Connection                                               terminals 7-, 8+, (9+)
Input signal                                              4 ... 20 mA , limited to approx. 30 mA
Input voltage                                            open loop voltage of the control system ≤ 30 V
Voltage drop                                             approx. 6 V at 20 mA
Input resistance                                        field wiring open circuit : > 100 kΩ
                                                               field wiring < 50 Ω : > 100 kΩ when using terminals 1 and 2
Output
Connection side                                         field side
Connection                                                terminals 1+, 2-
                                                                terminals 3+, 2- (no short circuit detection)
Voltage                                                     ≥ 13 V at 20 mA
Current                                                    4 ... 20 mA
Load                                                       100 ... 650 Ω , for terminals 1, 2
                                                              0 ... 550 Ω , for terminals 2, 3
Ripple                                                     20 mV rms
Line fault detection                                   breakage, load > 100 kΩ, short-circuit, load < 50 Ω
Fault indication output
Output type                                             open collector transistor (internal fault bus)
Transfer characteristics
Deviation                                                 at 20 °C (68 °F), 4 ... 20 mA
                                                               < 0.1 % of full scale, incl. non-linearity and hysteresis
Influence of ambient temperature               < 2 µA/K (-20 ... 70 °C (-4 ... 158 °F)); < 4 µA/K (-40 ... -20 °C (-40 ... -4 °F))
Frequency range                                        field side into the control side: bandwidth with 0.5 Vpp signal 0 ... 3 kHz (-3 dB)
                                                                control side into the field side: bandwidth with 0.5 Vpp signal 0 ... 3 kHz (-3 dB)
Rise time                                                   10 to 90 % ≤ 10 ms
Galvanic isolation
Input/Output                                              basic insulation according to IEC/EN 61010-1, rated insulation voltage 300 Veff
Input/power supply                                     basic 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
Labeling                                                     space for adhesive label at the front
Directive conformity
Electromagnetic compatibility
   Directive 2014/30/EU                                  EN 61326-1:2013 (industrial locations)
Conformity
Electromagnetic compatibility                          NE 21:2017
                                                                   EN 61326-3-2:2018
Degree of protection                                      IEC 60529
Protection against electrical shock                   UL 61010-1:2012
Ambient conditions
 Ambient temperature                                    -40 ... 70 °C (-40 ... 158 °F)
Mechanical specifications
Degree of protection                                       IP20
Connection                                                    screw terminals
Mass                                                             approx. 115 g
Dimensions                                                    20 x 124 x 115 mm (0.8 x 4.9 x 4.5 inch) , 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                          BAS 00 ATEX 7240 X
SMART Current Driver KFD2-SCD2-Ex1.LK PEPPERL FUCHS