Zone 0
Explosive gas atmosphere present continuously or for long periods
Zone 1
Explosive gas atmosphere likely to occur in normal operation
Zone 2
Explosive gas atmosphere unlikely to occur and, if it does, only for a short period
Zone 20
Explosive dust atmosphere present continuously or for long periods
Zone 21
Explosive dust atmosphere likely to occur in normal operation
Zone 22
Explosive dust atmosphere unlikely to occur and, if it does, only for a short period
# General
Product type: Intrinsically safe isolated barrier for analogue inputs
Brand: Pepperl+Fuchs
Series: K-System
Functions: transmitter power supply (including SMART), current, voltage and resistance repeater, HART loop converter
Channels: 1 or 2
Outputs: 1 output or 2 outputs (splitter)
SMART protocols: HART, BRAIN, Foxboro (KFD2-STC5)
# Certifications
Type of protection: intrinsic safety, associated apparatus
Field circuits: Zone 0, 1, 2 (Div. 1, 2)
Functional safety: up to SIL 3 (IEC/EN 61508)
Electromagnetic compatibility: Directive 2014/30/EU, EN 61326-1, NAMUR NE 21
# Electrical
Supply: 24 V DC (Power Rail), 20–90 V DC / 48–253 V AC or loop powered
Input signal: 4–20 mA; 0–12 V or -10 to 10 V (voltage repeaters)
Output: 4–20 mA sink or source (transmitter power supplies)
Accuracy: 0.1 % (KFD0-CS)
Cut-off frequency: 1.2 kHz (KFD2-VR voltage repeaters)
Galvanic isolation: input/output to IEC/EN 60079-11 (KFD0-CS)
# Mechanical
Width: 12.5 mm or 20 mm
Terminals: screw, removable screw or push-in spring
Degree of protection: IP20
Ambient temperature: -20 to 60 °C (KFD2-VR)
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