KFD2-ER-EX1.W.LB Pepperl+Fuchs 217732 Conductive Liquid Level Switch Safety Barrier

Key Features and Functions:
- Flexible Liquid Level Control: Supports minimum/maximum level control or on/off control, suitable for various liquid level management needs.
- Adjustable Sensitivity: The response resistance range (1 kΩ to 150 kΩ) can be adjusted via a potentiometer to adapt to different liquid conductivity levels.
- Relay Output: Equipped with a C-type relay output contact, capable of handling loads up to 253V AC / 2A, directly driving actuators such as alarms, pumps, or valves.
- Line Fault Detection (LB): Features line fault monitoring; when a break occurs in the electrode circuit, a red LED indicates the fault, and a fault signal is output, enhancing system reliability.
- Adjustable Delay Function: The signal delay time can be adjusted from 0.5 to 10 seconds, effectively preventing false triggering due to liquid level fluctuations.
- Intrinsically Safe and Explosion-Proof Certification: ATEX certified, suitable for hazardous areas Zone 0/1/2, ensuring safe operation in explosive environments.
- Easy Installation: DIN rail mountable, compact design, suitable for high-density installation in control cabinets.

Technical Specifications Overview:
- Supply Voltage: 20 to 30 V DC
- Current Consumption: Approx. 30 to 40 mA
- Input Method: Conductive probe level sensor
- Output Method: Relay contact (C type)
- Response Resistance Range: 1 kΩ to 150 kΩ (adjustable)
- Signal Delay: 0.5 s, 2 s, 5 s, 10 s (adjustable)
- Protection Class: IP20
- Operating Temperature: -20°C to +60°C

Compliant with International Standards:
ATEX Directive 2014/34/EU
IEC/EN 60079-0, 60079-11 (Intrinsic Safety)
EMC Directive 2014/30/EU (EN 61326-1)
Low Voltage Directive 2014/35/EU (EN 61010-1)

Typical Applications:
- Level alarm and automatic control for chemical storage tanks
- Level monitoring in drinking water or wastewater treatment systems
- Level control of conductive liquids in the food industry
- Safety monitoring of flammable and explosive liquids in oil platforms or refineries

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