Pepperl+Fuchs KFD2-ST2-Ex1.LB

Switch Amplifier
SKU: KFD2-ST2-Ex1.LB
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The Switch Amplifier is a 1-channel isolated barrier designed for use in hazardous environments. It supports both dry contact and NAMUR inputs, offering versatility in various applications.

All description
Manufacturer: Pepperl+Fuchs
Description:

The Switch Amplifier family from Pepperl+Fuchs is engineered to provide reliable signal conditioning and isolation for applications in potentially explosive atmospheres. These devices play a critical role in ensuring safety by facilitating the safe transmission of signals from field devices to control systems while maintaining intrinsic safety standards.

Common applications include industrial automation, process control, and safety monitoring in sectors such as oil and gas, chemical processing, and pharmaceuticals. The amplifiers feature a 24 V DC supply, active transistor output, and line fault detection (LFD), making them suitable for a wide range of operational environments. With the capability to achieve up to SIL 2 according to IEC 61508, these devices ensure high levels of safety integrity in critical operational processes.

Connection side control side
Input/power supply reinforced insulation acc. to IEC 62103, rated insulation voltage 300 Vrms
Connection Power Rail or terminals 14+, 15-
Dimensions 20 x 119 x 115 mm (0.8 x 4.7 x 4.5 inch) , housing type B2
Labeling space for labeling at the front
Rated current 50 mA
Ambient temperature -20 … 60 °C (-4 … 140 °F)
Connection screw terminals
Open circuit voltage/short-circuit current approx. 8 V DC / approx. 8 mA
Ripple 10 %
Degree of protection IEC 60529:2001
Switching frequency 5 kHz
Output/power supply not available , common pole terminal 14+
Control elements DIP-switch
Output II signal or error message , electronic output, active
Input/Output reinforced insulation acc. to IEC 62103, rated insulation voltage 300 Vrms
Safety Integrity Level (SIL) SIL 2
Signal level 1-signal: (L+) – 3.5 V (100 mA, short-circuit protected)
0-signal: switched off (off-state current 10 andmicro;A)
Output/Output not available , common pole terminal 14+
Configuration via DIP switches
Switching point/switching hysteresis 1.2 … 2.1 mA / approx. 0.2 mA
Input EN 60947-5-6:2000
Output I signal , electronic output, active
Rated values acc. to EN 60947-5-6 (NAMUR), see system description for electrical data
Supplementary information Observe the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see www.pepperl-fuchs.com.
Display elements LEDs
Connection side field side
Certificate TV 99 ATEX 1499 X
Signal type Digital Input
Collective error message Power Rail
Mass approx. 150 g
Connection output I: terminals 7+ ; output II: terminals 9+
Line fault detection breakage I 0.1 mA , short-circuit I > 6 mA
Rated voltage 20 … 30 V DC
EU-Type Examination Certificate PTB 00 ATEX 2035
Optional accessories – power feed module KFD2-EB2(.R4A.B)(.SP)
– universal power rail UPR-03(-M)(-S)
– profile rail K-DUCT-BU(-UPR-03)
Degree of protection IP20
Galvanic isolation IEC 62103:2003
Mounting on 35 mm DIN mounting rail acc. to EN 60715:2001
Connection terminals 1+, 2+, 3-
Electromagnetic compatibility NE 21:2004
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