Product Description

​The Pepperl+Fuchs KFD2-SR2-EX2.W is a two-channel isolated switch amplifier designed to interface with NAMUR sensors and dry contact switches, converting their signals into relay outputs suitable for control systems. It operates with a 19 to 30 V DC supply voltage and features relay contact outputs capable of handling up to 2 A at 250 V AC or 40 V DC. With an IP20-rated housing, the device is suitable for mounting on a 35 mm DIN rail in industrial environments.

Technical Specifications

• Signal Type: Digital Input​
• Pepperl+Fuchs
• +1
• Franklin Empire
• +1
• Functional Safety: SIL 2 (IEC/EN 61508)​
• Pepperl+Fuchs
• Supply Voltage: 19 to 30 V DC​
• Franklin Empire
• Supply Current: ≤ 50 mA​
• Power Dissipation: ≤ 1 W​
• Franklin Empire
• Input Connections: Terminals 1+, 2+, 3-; 4+, 5+, 6-​
• Pepperl+Fuchs
• Input Characteristics: NAMUR standard (8 V open circuit voltage, 8 mA short-circuit current)​
• Pepperl+Fuchs
• Line Fault Detection: Breakage detection (I ≤ 0.1 mA), short-circuit detection (I > 6 mA)​
• Pepperl+Fuchs
• Output Connections: Terminals 7, 8, 9 (Output I); 10, 11, 12 (Output II)​
• Pepperl+Fuchs
• Relay Contact Ratings: 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 load​
• Pepperl+Fuchs
• +1
• Franklin Empire
• +1
• Minimum Switching Current: 2 mA at 24 V DC​
• Pepperl+Fuchs
• Switching Frequency: ≤ 10 Hz​
• Galvanic Isolation: Reinforced insulation (rated voltage 300 V AC) between input, output, and power supply​
• Pepperl+Fuchs
• Ambient Temperature Range: -40 to 70 °C (-40 to 158 °F)​
• Housing: IP20-rated, suitable for DIN rail mounting (35 mm)​
• Franklin Empire
• Dimensions: 20 mm (W) x 119 mm (H) x 115 mm (D)​
• Pepperl+Fuchs
• Approvals: cULus Listed, FM, IECEx, ATEX