Pepperl + Fuchs KFD2-SR2-EX1.W.LB PLC Module

Core Features & Advantages

• Intrinsically Safe & Highly Reliable – The module's standout feature is its isolated barrier design, which limits voltage, current, and provides galvanic isolation to prevent hazardous energy from reaching the field side. It carries PTB 00 ATEX 2080 certification with marking II (1)G [Ex ia Ga] IIC, safely connecting to intrinsically safe devices installed in Zone 0, 1, and 2 hazardous areas. Its SIL 2 functional safety certification further ensures reliable performance in critical safety applications.

• Flexible Configuration & Functionality – The module is configurable via onboard DIP switches, allowing settings such as direct/inverting operating modes. It supports 1 input and 2 relay outputs, enabling use as a signal splitter. Additionally, it provides a fault relay output contact for transmitting line fault or module fault signals to the control system.

• Comprehensive Fault Detection & Diagnostics – The module features built-in Line Fault Detection (LFD) to continuously monitor the field-side wiring. When sensor line faults occur—open-circuit (current ≤ 0.1 mA) or short-circuit (current > 6 mA)—the module quickly detects the condition and issues alarms via LED indicators and the fault relay output, greatly simplifying on-site maintenance and troubleshooting.

Typical Applications

The KFD2-SR2-EX1.W.LB is widely used in applications requiring intrinsic safety and reliable switching signal transmission, such as:

• Petrochemical Industry – Safely transmitting signals from level switches, flow switches, and other intrinsically safe devices installed on tanks and reactors to DCS or PLC systems.

• Pharmaceutical Manufacturing – Reliably converting position sensor signals from Ex-classified areas in cleanrooms containing hazardous solvents.

• Gas Detection – Used with various intrinsically safe gas detectors, triggering relay outputs upon alarm threshold activation to actuate audible/visual alarms or shutdown valves.

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