PEPPERL+FUCHS Switch Amplifier KFD2-SR2-Ex1.W.LB (37373S)

The Pepperl+Fuchs KFD2-SR2-Ex1.W.LB is an intrinsically safe switch amplifier and isolated barrier designed to transfer signals from NAMUR sensors or dry contacts in hazardous areas to control systems in safe areas. Commonly used in process automation, it provides reliable signal isolation, relay outputs, and line fault detection for hazardous-area applications.

Key Features

• 1-channel isolated barrier
• NAMUR sensor or dry contact input
• Relay contact output
• Intrinsically safe interface
• Line fault detection (LFD)
• Fault relay output
• Reversible operating mode
• SIL 2 rated
• 24 VDC supply via Power Rail
• DIN rail mounting

Specifications

• Manufacturer: Pepperl+Fuchs
• Model: KFD2-SR2-Ex1.W.LB
• Part Number: 37373S
• Type: Switch Amplifier / Isolated Barrier
• Channels: 1
• Input: NAMUR sensor or dry contact
• Output: Relay contact
• Supply Voltage: 19–30 VDC
• Mounting: 35 mm DIN Rail
• Functional Safety: SIL 2
• Hazardous Area Approval: Intrinsically Safe Interface
• Ex PTB Nr. Ex-94.C.2086 [EEx ia] IIC
• Width: 20 mm

Function

The KFD2-SR2-Ex1.W.LB safely transfers digital signals from hazardous areas to PLCs, DCS systems, and other control equipment located in safe areas. It provides galvanic isolation, relay switching, fault monitoring, and protection for intrinsically safe field devices. Typical field devices include NAMUR proximity sensors, limit switches, and mechanical contacts.

Typical Applications

• Oil & Gas
• Chemical Processing
• Refineries
• Pharmaceutical Plants
• Tank Farms
• Hazardous Area Automation
• Valve Position Monitoring
• Limit Switch Monitoring
• Process Safety Systems

Condition

Used industrial surplus, brand new looking. Removed from a working environment. Please review all photographs carefully for exact condition and included accessories.

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