Pepperl+Fuchs|KFD2-STC4-EX1.2O|Isolated Barrier
Description
The KFD2-STC4-Ex1.2O is an isolated barrier designed for intrinsic safety applications, supplying 2-wire and 3-wire SMART transmitters in hazardous areas. It transfers analog input signals to a safe area as isolated current values and supports HART, BRAIN, and Foxboro protocols.
Features
- Isolated signal transmission
- Supports 2-wire/3-wire SMART transmitters
- Dual output 0/4 mA ... 20 mA
- Integrated HART communication resistance
- Terminal blocks with test sockets
- Up to SIL 3 certification
Technical Specifications
- Operating Temperature: -20°C to +60°C
- Supply Voltage: 20 ... 35 V DC
- Power Dissipation: 1.8 W
- Input Signal: 0/4 ... 20 mA
- Open Circuit Voltage: 22.7 V (terminals 1+, 3-)
- Voltage Drop: ≤ 2.4 V at 20 mA (terminals 5, 6)
- Output Load: 0 ... 550 Ω at 20 mA
- Output Signal: 0/4 ... 20 mA (overload > 25 mA)
- Frequency Range: 0 ... 7.5 kHz (-3 dB)
- Galvanic Isolation: 50 V AC rated insulation voltage
- Safety Integrity Level (SIL): SIL 3
- Certifications: ATEX, IECEx, UL approvals
- Dimensions: 20 x 124 x 115 mm (W x H x D)
- Weight: Approx. 200 g
Pepperl+Fuchs|KFD2-STC4-EX1.2O|Isolated Barrier





Pepperl+Fuchs|KFD2-STC4-EX1.2O|Isolated Barrier
Description
The KFD2-STC4-Ex1.2O is an isolated barrier designed for intrinsic safety applications, supplying 2-wire and 3-wire SMART transmitters in hazardous areas. It transfers analog input signals to a safe area as isolated current values and supports HART, BRAIN, and Foxboro protocols.
Features
- Isolated signal transmission
- Supports 2-wire/3-wire SMART transmitters
- Dual output 0/4 mA ... 20 mA
- Integrated HART communication resistance
- Terminal blocks with test sockets
- Up to SIL 3 certification
Technical Specifications
- Operating Temperature: -20°C to +60°C
- Supply Voltage: 20 ... 35 V DC
- Power Dissipation: 1.8 W
- Input Signal: 0/4 ... 20 mA
- Open Circuit Voltage: 22.7 V (terminals 1+, 3-)
- Voltage Drop: ≤ 2.4 V at 20 mA (terminals 5, 6)
- Output Load: 0 ... 550 Ω at 20 mA
- Output Signal: 0/4 ... 20 mA (overload > 25 mA)
- Frequency Range: 0 ... 7.5 kHz (-3 dB)
- Galvanic Isolation: 50 V AC rated insulation voltage
- Safety Integrity Level (SIL): SIL 3
- Certifications: ATEX, IECEx, UL approvals
- Dimensions: 20 x 124 x 115 mm (W x H x D)
- Weight: Approx. 200 g