Pepperl Fuchs KFD2-ST3-Ex1.LB Switch Amplifier (262110)

The P&F KFD2-ST3-Ex1.LB is a 1-channel intrinsically safe switch amplifier that provides two active transistor outputs from a single NAMUR sensor or dry contact input in hazardous areas. This signal splitter enables dual output control in safe areas while supporting fault messaging and configuration flexibility.

With line fault detection, output mode selection (signal or error), and DIP switch-based logic reversal, this SIL 2 certified device delivers highly adaptable digital signal handling in safety-critical environments.

Technical Specifications

Model: KFD2-ST3-Ex1.LB
Type: Intrinsically Safe Switch Amplifier
Input Type: NAMUR sensor or dry contact
Output Type: 2 x active transistor outputs
Channels: 1
Mounting: 35 mm DIN rail (EN 60715)

Input Specifications

• Connection Terminals: 1+, 2+, 3-
• Standard: EN 60947-5-6 (NAMUR)
• Open Circuit Voltage: Approx. 10 V DC
• Short-Circuit Current: Approx. 8 mA
• Switching Point: 1.2 … 2.1 mA
• Hysteresis: Approx. 0.2 mA
• Line Fault Detection: Break ≤ 0.1 mA, Short ≥ 6.5 mA
• Pulse/Pause Ratio: Min. 100 µs

Output Specifications

• Output Terminals: I: 7+ | II: 9+
• Output Type: Active transistor (signal or fault message)
• Rated Voltage: 30 V DC
• Rated Current: 100 mA
• Response Time: ≤ 200 µs
• Signal Levels:
  • 1-Signal: Supply voltage – 3 V max @ 100 mA
  • 0-Signal: Off-state current ≤ 10 µA
• Switching Frequency: ≤ 5 kHz

Power & Configuration

• Supply Voltage: 19 … 30 V DC
• Rated Current: 10 … 15 mA + I_out
• Power Dissipation: ≤ 800 mW
• Power Rail Support: Yes
• Visual Indicators: LEDs (NAMUR NE 44)
• Configuration: DIP switch configurable (reversal, output mode)

Galvanic Isolation

• Input/Output: Reinforced (300 Veff)
• Input/Power Supply: Reinforced (300 Veff)

Environmental & Mechanical

• Operating Temperature: -20 … 60 °C
• Degree of Protection: IP20
• Connection: Screw terminals
• Dimensions: 20 x 119 x 115 mm (W x H x D)
• Weight: Approx. 150 g

Certifications & Safety

• SIL Rating: SIL 2 (SC 3) per IEC/EN 61508
• ATEX Marking: II 3(1)G Ex nA [ia Ga] IIC T4 Gc / II (1)D [Ex ia Da] IIIC / I (M1) [Ex ia Ma] I
• IECEx Marking: Ex nA [ia Ga] IIC T4 Gc / [Ex ia Da] IIIC / [Ex ia Ma] I
• Certificates: EXA 16 ATEX 0016 X, IECEx EXA 16.0009X
• Max Safe Voltage (Um): 253 V AC

Key Features & Benefits

✅ Signal Splitting Capability: One input can drive two active outputs.

✅ Configurable Output II: Use for signal or fault messaging as needed.

✅ SIL 2 Rated: Meets safety integrity level requirements per IEC/EN 61508.

✅ High-Speed Switching: Up to 5 kHz with sub-millisecond response.

✅ DIN Rail Form Factor: Compact 20 mm width housing for efficient panel space.

📦 Buy Pepperl+Fuchs KFD2-ST3-Ex1.LB from Drive Outlet Megastore

At Drive Outlet Megastore we offer unbeatable KFD2-ST3-Ex1.LB prices.

Compact and configurable, this switch amplifier delivers dual transistor outputs from a single input for advanced diagnostics and dual-zone control.

In stock now and available with 2–3 days delivery.

Contact us to place your order today.