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The PEPPERL & FUCHS 421270 is a K-System intrinsic safety barrier functioning as a repeater power supply with an integrated PROFINET IO interface. It provides galvanic isolation and power to 2-wire 4-20mA transmitters located in hazardous areas, converting their analog signals into digital data for direct integration into PROFINET-based control systems. This module is engineered for critical process automation applications requiring certified intrinsic safety and deterministic communication.
Technical Specifications:
SERIES/FAMILY: K-System (KFD2-CD-EX1.PN)
COMPONENT TYPE: Intrinsic Safety Barrier / Repeater Power Supply with PROFINET Interface
ELECTRICAL SPECS:
SUPPLY VOLTAGE: 20-35VDC (via power rail or terminals)
INPUT: 2-wire 4-20mA current loop from hazardous area
OUTPUT: PROFINET IO (digital communication)
POWER CONSUMPTION: Typically < 2W
INTERFACE/CONTROL:
FIELD INTERFACE: Intrinsically safe input for 2-wire transmitters (4-20mA)
CONTROL INTERFACE: PROFINET IO (RJ45 ports, typically 2 for daisy-chaining)
DIAGNOSTICS: Status LEDs for power, fault, and communication
CONFIGURATION: Via PROFINET GSDML file and PLC engineering software
ENVIRONMENTAL/MOUNTING:
IP RATING: IP20
MOUNTING: 35mm DIN rail mount
OPERATING TEMPERATURE: -20 to +60 °C
HAZARDOUS AREA CERTIFICATION: ATEX, IECEx, FM, cULus for Ex ia IIC/IIB (ensures intrinsic safety for connected field devices)
COMPATIBILITY/APPLICATION:
TARGET SYSTEMS: Distributed Control Systems (DCS) and Programmable Logic Controllers (PLC) utilizing PROFINET IO
FIELD DEVICES: 2-wire 4-20mA transmitters (e.g., pressure, temperature, level, flow sensors) located in Zone 0, 1, 2 hazardous areas
FUNCTION: Galvanic isolation, signal conditioning, and power supply for field devices
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