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

At Drive Outlet Megastore we offer unbeatable KFD2-STC4-Ex2 prices.

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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