SMART TRANSMITTER POWER SUPPLY KFD2-STC4-1

Product Description

The KFD2-STC4-1 Smart Transmitter Power Supply is a high-performance signal conditioning module designed by Pepperl+Fuchs for industrial automation and process control systems. It provides power to 2-wire/3-wire SMART (HART-compatible) transmitters and safely transfers 4–20 mA analog signals from field devices to control systems with galvanic isolation.

This device is widely used in oil & gas, chemical plants, refineries, and industrial instrumentation systems where accurate signal transmission and safe isolation are required.

Key Features

• 1-channel SMART transmitter power supply
• Supplies 2-wire & 3-wire 4–20 mA transmitters
• HART / SMART protocol transparent communication
• Galvanic isolation between input, output, and power supply
• Internal 250 Ω resistor for HART communication support
• DIN rail mounting (control panel installation)
• High accuracy signal transfer with low deviation
• Suitable for SIL 2 applications (functional safety)
• LED power indication for monitoring status
• Supports bi-directional digital communication

Specifications

• Product Type: SMART Transmitter Power Supply / Signal Isolator
• Model: KFD2-STC4-1
• Manufacturer: Pepperl+Fuchs
• Channels: 1 channel
• Input Signal: 0/4 … 20 mA (SMART transmitter compatible)
• Output Signal: 0/4 … 20 mA isolated output
• Supply Voltage: 20 … 35 V DC (Power Rail or terminals 14+, 15−)
• Power Consumption: approx. 1.8 – 2.5 W
• Load Resistance: up to ~550–800 Ω at 20 mA
• Frequency Range: up to 7.5 kHz (-3 dB)
• Accuracy: ≤ ±10 µA (typical)
• Isolation: Galvanic isolation (input/output/power)
• Mounting Type: DIN rail (35 mm)
• Operating Temperature: -20°C to +60°C
• Protection Class: IP20 (panel mounting)
• Safety Level: Up to SIL 2 (IEC 61508)