Pepperl+Fuchs KFD2-SR2-Ex1.W Switch Amplifier (70101737)

The P&F KFD2-SR2-Ex1.W is a 1-channel intrinsically safe switch amplifier designed to transfer digital signals from NAMUR sensors or dry contacts in hazardous areas to control equipment in safe zones. With integrated line fault detection, reversible logic operation, and relay contact output, it is certified for SIL 2 functional safety and ideal for position monitoring, end stop detection, and similar applications in process automation.

Technical Specifications

Model: KFD2-SR2-Ex1.W
Type: Intrinsically Safe Switch Amplifier
Input Type: NAMUR sensor or dry contact
Output Type: Relay contact output
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. 8 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 mA
• Pulse/Pause Ratio: Min. 20 ms

Output Specifications

• Output Terminals: 7, 8, 9
• Output Type: Relay contact
• Contact Rating:
  • 250 V AC / 2 A (cos φ > 0.75)
  • 126.5 V AC / 4 A (cos φ > 0.75)
  • 40 V DC / 2 A resistive
• Minimum Switching Current: 2 mA @ 24 V DC
• Switching Delay: Approx. 20 ms (On/Off)
• Mechanical Life: 10⁷ switching cycles

Power & Configuration

• Supply Voltage: 19 … 30 V DC
• Rated Current: ≤ 35 mA
• Power Dissipation: ≤ 0.7 W
• Power Rail Support: Yes
• Visual Indicators: LEDs (NAMUR NE 44)
• Configuration: DIP switch configurable

Galvanic Isolation

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

Environmental & Mechanical

• Operating Temperature: -40 … 70 °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 (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 ia Ma I / Ex ec nC IIC T4 Gc
• FM/UL Approval: Yes (FM19US0207X, UL E106378)
• Certificates: PTB 00 ATEX 2080, TÜV 99 ATEX 1493 X, IECEx PTB 11.0034, IECEx TUN 19.0013X
• Max Safe Voltage (Um): 253 V AC / 125 V DC

Key Features & Benefits

✅ Reliable Relay Output: Supports high-voltage control switching.

✅ Fault Detection & Diagnostics: Built-in LFD and LED indicators.

✅ Safe Electrical Isolation: Reinforced galvanic isolation across all ports.

✅ SIL 2 Certified: Functional safety compliance for critical applications.

✅ DIN Rail Mount: Easy installation in compact control panels.

📦 Buy Pepperl+Fuchs KFD2-SR2-Ex1.W from Drive Outlet Megastore

The KFD2-SR2-Ex1.W is your go-to barrier for safe and dependable digital signal transfer in hazardous locations. Perfect for integrating NAMUR devices into safe control systems.

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

Contact us to place your order today.