KFD2-SL2-Ex2 Pepperl Fuchs ISOLATION BARRIER FOR SOLENOID VALVE DRIVER

Product parameters

Power supply: Rated voltage 20... 30 V DC (powered by Power Rail or terminal), power dissipation ≤ 1.5 W, maximum power consumption ≤ 2 W, ripple ≤ 50 µA rms.

Input (control side) : Connect terminals 1+ and 2-; 4+, 5-, input type non-polar logic input (high level ≥ 10 V DC, low level ≤ 2 V DC), load ≥ 100 kΩ, response time < 10 ms.

Output (on-site side) : Connect terminals 7+ and 8-; 10+, 11-, output voltage 11.7V DC, maximum current 45 mA, load 0... 300 Ω (including solenoid valve resistance), overload protection, response time < 10 ms.

Performance indicators: Switching frequency up to 10Hz, LFD detects open circuit/short circuit faults, LED indicates fault status, high precision, supports SIL 2 applications.

Isolation and Safety: The input/output and input/power supply are intrinsically safe isolated (peak voltage 375V), the output/power supply is functionally isolated (50V AC), the protection class is IP20, in compliance with SIL 2 (IEC/EN 61508), and the electromagnetic compatibility complies with EN 61326-1:2013.

Certifications: CE, ATEX (II (1)G [Ex ia Ga] IIC, etc.), IECEx, cULus, explosion parameters Uo = 11.7V, Io = 45mA, Po = 0.26W, Um = 250V.

Mechanical parameters: Dimensions 20 x 124 x 115 mm, weight approximately 150 g, installed on 35 mm DIN rail, screw terminal connection, ambient temperature -20... 60 °C.

Function

Isolate and convert the non-polar logic input signal from the safe area into a current output for the hazardous area, which is used to drive a 2-channel solenoid valve or indicator light.

Supports line fault detection (LFD), automatically identifies open circuits or short circuits, and displays them through LED indicator lights for convenient fault diagnosis.

It provides 11.7V DC output, up to 45mA, and supports Power Rail system integration and SIL 2 functional safety.

Intrinsically safe design, fast response (< 10ms), equipped with green LED (normal power supply) and red LED (fault).

Easy to install and maintain, compatible with DIN rails, and suitable for isolated transmission of switch signals.

Application scenarios

KFD2-SL2-Ex2 is widely used in process automation in industries such as petrochemicals, pharmaceuticals, mining and oil refining, and is suitable for explosive hazardous areas in Zone 0/1/2 or Div.1/2. It is used to control solenoid valves, pneumatic actuators or indicator lights in hazardous areas, ensuring reliable transmission of logical signals by control systems in safe areas (such as PLCS or DCS), while supporting fault detection and SIL 2 safety applications. The equipment complies with ATEX, IECEx and cULus certifications and is suitable for industrial process systems that require high safety and precise control.

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