Pepperl Fuchs KFD2-STC4-Ex2 Transmitter Power Supply (283699)
P&F KFD2-STC4-Ex2 is a 2-channel SMART transmitter power supply designed for intrinsically safe applications with 2-wire transmitters in hazardous areas. This isolated barrier converts analog input signals into isolated 0/4–20 mA outputs in the safe area. It supports bi-directional communication with HART, BRAIN, and Foxboro protocols, and includes internal resistance for enhanced HART communication reliability, as well as integrated test terminals.
Technical Specifications
- Model: KFD2-STC4-Ex2
- Function: SMART Transmitter Power Supply
- Channels: 2
- Input Signal: 0/4 … 20 mA
- Output Signal: 0/4 … 20 mA (overload > 25 mA)
- Power Supply: 20 … 35 V DC (via Power Rail or terminals)
- Signal Direction: Field to control side
- Mounting: 35 mm DIN rail (EN 60715)
- Connection Type: Screw terminals with integrated HART test sockets
Electrical Features
- Isolation: 3-way isolation (input/output/power)
- Signal Type: Analog 0/4–20 mA with HART, BRAIN, and Foxboro support
- Load Resistance: 0 … 550 Ω at 20 mA
- Ripple: Max. 50 µA rms
- Transfer Accuracy: ≤ 10 µA at 20 °C
- Frequency Range: 0 … 7.5 kHz (bi-directional)
- Settling Time: 200 µs
- Rise/Fall Time: 20 µs
Environmental Conditions
- Temperature Range: -20 … 60 °C
- Protection: IP20
- Weight: Approx. 150 g
- Housing Type: B2 (20 x 124 x 115 mm)
- Approvals: ATEX, IECEx, UL, FM
Hazardous Area Compliance
- Zone Classification: Zone 0, 1, 2 / Div. 1, 2
- ATEX Marking: II (1) G [Ex ia Ga] IIC / II (1) D [Ex ia Da] IIIC / I (M1) [Ex ia Ma] I
- IECEx Marking: [Ex ia Ga] IIC, [Ex ia Da] IIIC, Ex nA IIC T4 Gc
- SIL Rating: SIL 2 compliant (IEC/EN 61508)
Key Features & Benefits
✅ Dual Channel: Efficient 2-loop signal isolation in one compact device.
✅ Protocol Compatible: Supports HART, BRAIN, and Foxboro systems.
✅ High Accuracy: ±10 µA deviation ensures reliable performance.
✅ Fast Signal Response: 200 µs settling with 7.5 kHz bandwidth.
✅ SIL 2 Certified: Suitable for use in safety-instrumented systems.
📦 Buy Pepperl+Fuchs KFD2-STC4-Ex2 from Drive Outlet Megastore
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A space-saving, high-performance 2-channel barrier for safe analog signal transmission in hazardous zones — optimized for SMART field devices.
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