8/12/2019 Types of Barrier
1/2
(A)Isolated Barriers
o K-SystemSwitch Amplifier
Frequency Converters
Relay Modules
Solenoid Drivers
Signal Converters
Trip AmplifiersCurrent Drivers
Transmitter Power Supplies
Repeaters
Surge Protection
(B)Zener Barriers
SMART CURRENT DRIVER (KFD2-SCD-EX1.LK):This isolated barrier is
used for intrinsic safety applications. Itdrives SMART I/P
converters, electrical valves, and positioners in hazardous areas.
It is called as analog outputbarrier. DC to DC Converter
SMART TRANSMITTER POWER SUPPLY(KFD2-STC4-EX1): This isolated
barrier is used for intrinsic safety
applications.The device supplies 2-wire and 3-wire SMART
transmitters in a hazardous area, and can also be usedwith 2-wire
SMART current sources. It transfers the analog input signal to
thesafe areaas an isolated current value.These are called as analog
input barrier.1-channel isolated barrier 24 V DC supply (Power
Rail) Input 2-wire and 3-wire SMART transmitters and 2-wire SMART
current sources Output 0/4 mA ... 20 mA
TRANSMITTER POWER SUPPLY (KFD2-CR4-1.2O):This signalconditioner
provides the isolation for Nonintrinsicallysafe applications.The
device supplies 2-wire and 3-wire transmitters, and can also be
used with 2-wire currentsources.It transfers the analog input
signal as two isolated current values. Both outputs provide a 0/4
mA ... 20mAcurrent corresponding to the input signal. The minimum
available field voltage is 16 V at 20 mA.
1-channel signal conditioner 24 V DC supply (Power Rail)
Input 2-wire and 3-wire transmitters and 2-wire current sources
Signal splitter (1 input and 2 outputs) Dual output 0/4 mA ... 20
mA
SWITCH AMPLIFIER:KFD2-SR2-EX2.w: This isolated barrier is used
for intrinsic safety applications. It transfersdigital signals
(NAMUR sensors/mechanical contacts) from a hazardous area to a safe
area. The proximity sensor orswitch controls a form C changeover
relay contact for the safe area load. The normal output state can
be reversedusing switches S1 and S2. Switch S3 is used to enable or
disable line fault detection of the field circuit.
2-channel isolated barrier 24 V DC supply (Power Rail) Dry
contact or NAMUR inputs Relay contact output
FREQUENCY CONVERTERS WITH TRIP VALUES(KFD2-UFC-Ex1.D):This
isolated barrier is used for intrinsicsafety applications. It is a
universal frequency converter that changes a digital input (NAMUR
sensor/mechanicalcontact) into a proportional free adjustable 0/4
mA ... 20 mA analog output and functions as a switch amplifier and
atrip alarm. Also the functions of the switch outputs (2 relay
outputs and 1 potential free transistor output) are
easilyadjustable [trip value display (min/max alarm), serially
switched output, pulse divider output, error signal output] .
1-channel isolated barrier 24 V DC supply (Power Rail) Dry
contact or NAMUR inputs Input frequency 1 mHz ... 5 kHz Current
output 0/4 mA ... 20 mA
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