KFD2-STC4-Ex2-Y1 Pepperl Fuchs SMART Transmitter Power Supply

Product parameters

Power supply: Rated voltage 20... 35 V DC (via Power Rail or terminals 14+, 15-), power dissipation 1.8 W, maximum power consumption ≤ 2.7 W, output ripple ≤ 50 µA rms.

Input (on-site side) : Connect terminals 1+ and 3-; 4+, 6-, input signal 0/4... In Sichuan Province, the usable voltage of the 20 mA, 2-wire transmitter is ≥ 16 V (at 20 mA).

Output (control side) : Connect terminals 7-, 8+; 10-, 11+, output signal 0/4... 20 mA (overload > 25 mA), load 0... 550 Ω, ripple ≤ 50 µA rms, deviation ≤ 10 µA (at 20 °C), temperature influence 0.25 µA/K.

Performance indicators: Frequency range 0... 7.5 kHz (Field to control side, -3 dB), 0.3... 7.5 kHz (controlled to the field side), stabilization time 200 µs, rise/fall time 20 µs.

Isolation and Safety: The input/output and input/power supply are intrinsically safe isolated (peak voltage 375V), and the output/power supply and output/output are 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.

Certification: CE, ATEX (BAS 99 ATEX 7025 X, II (1)G [Ex ia Ga] IIC; TUV 99 ATEX 1499 X, II 3G Ex nA II T4, IECEx (BAS 04.0015, CML 15.0055X), cULus, explosion parameters Uo = 25.2 V, Io = 93 mA, Po = 0.586 W Um = 250 V.

Function

Provide 24V DC power supply for 2-wire intelligent transmitters in hazardous areas, and isolate and transmit 0/4... 20 mA analog signal to the safe area.

Supports bidirectional transmission of digital signals with protocols such as HART, BRAIN, and Foxboro 2, and has a built-in 250 Ω resistor to ensure HART communication compatibility.

Test point terminals and green LED indicator lights are provided for easy debugging and status monitoring.

Intrinsically safe design, in compliance with SIL 2 standards, with A transmission deviation of ≤ 10 µA and a fast response time (rise time 20 µs).

Supports Power Rail installation, compatible with 3-wire transmitter expansion, and easy to maintain.

Application scenarios

KFD2-STC4-Ex2-Y1 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 supplies power to pressure, temperature, flow and other transmitters and isolates signals to ensure that control systems such as PLC or DCS can safely receive data. At the same time, it supports digital diagnosis and configuration of protocols such as HART. The equipment complies with ATEX, IECEx and cULus certifications and is suitable for industrial process control scenarios that require high safety and precision.

Advantage Products:

All items are Distributor Ready-stock Genuine Brand-new Supplying, please inform us if the other conditions are needed, Used, Open-box, Refurbished, etc.

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