Pepperl+FuchsKFD2-STC3-Ex11-Channel Intrinsic-Safety Isolated Barrier / SMART Transmitter Power Supply, 4-20 mA, HART, Ex ia IIC, DIN Rail

Product Description

What this part is:

Pepperl+Fuchs KFD2-STC3-Ex1, a K-System SMART transmitter power supply: a single-channel intrinsically safe isolated barrier. It supplies a 2-wire transmitter in a hazardous area and passes the 4 to 20 mA measurement to safe-area output terminals with galvanic isolation. Digital protocol signals such as HART are transferred in both directions. Unit Quantity: 1 Pc.

Decoding the designation:

KFD2 — K-System isolated barrier, 24 V DC powered, 20 mm DIN-rail housing.

STC — SMART transmitter power supply, current output.

3 — generation within the STC line.

Ex1 — one intrinsically safe channel.

116308 — Pepperl+Fuchs order number for this device.

Specifications:

Channels: 1, intrinsically safe input. Supply: 20 to 35 V DC via Power Rail or terminals 7+, 8−. Power Loss: 1.3 W. Power Consumption: up to 1.7 W. Input: 4 to 20 mA on terminals 1+, 3−, approximately 16.5 V available at 20 mA. Output: 4 to 20 mA on terminals 9+, 10−, 11+; maximum load 1000 Ω, minimum 230 Ω for HART. Ripple: up to 0.05% of range. Accuracy: up to 0.03% of range (voltage output), up to 0.05% of range (current output). Temperature Influence: up to 20 ppm/K. Bandwidth: 0 to 40 kHz at −1 dB, 0 to 100 kHz at −6 dB, both directions. Rise Time and De-energised Delay: 10 µs. SMART systems supported: ABB, Bailey, Chessel, Eckhardt-Foxboro, Endress+Hauser, Fuji, Emerson, Smar, Siemens, VEGA, Yokogawa. Hazardous Area Marking: II (1) G D [EEx ia] IIC, circuits in zone 0/1/2; suitable for installation in Division 2. Intrinsic Safety Parameters: Uo 25.2 V DC, Io 93 mA, Po 587 mW; Um 250 V. Permitted External Reactances: 2.9 µF / 35.2 mH (IIA), 0.82 µF / 17.3 mH (IIB), 0.107 µF / 4.2 mH (IIC). Certificates: EC-type examination BAS 01 ATEX 7369; FM 4Z6A5.AX, control drawing 116-0129; UL control drawing E 106378; CSA control drawing LR 65756-13; drawing 116-0132. Isolation: input/output and input/supply safe electrical isolation per EN 50020, 375 V peak; output/supply basic insulation per EN 50178, 50 V AC. EMC: EN 61326, EN 50081-2, NAMUR NE 21. Ambient Temperature: −20 to +60 °C. Degree of Protection: IP20. Dimensions: 20 x 107 x 115 mm. Mass: approximately 150 g. Unit Quantity: 1 Pc.

Dimensions and mounting:

20 mm wide DIN-rail housing, 20 x 107 x 115 mm. Power comes from terminals 7+/8− or from a PR-03 or UPR-03 Power Rail fed by a KFD2-EB2 power feed module, which fuses and monitors up to 100 devices. KF-STP-BU and KF-STP-GN terminals carry communicator jacks for handheld access. Terminal 12 drives active input cards such as the Foxboro FMB 18.

Compatibility and replacement:

Successor: KFD2-STC4-Ex1, a functional replacement in the same K-System format with different safety parameters and terminal functions. KFD2-STV3-Ex1-1 is the voltage-output sibling in the same generation. KCD2-STC-Ex1 is the loop-powered K-System equivalent with no separate 24 V supply. HiD-system modules such as the HiD2030 do the same signal job and mount on a termination board instead of DIN rail. Alternate written forms: KFD2-STC3-Ex1, KFD2-STC3-EX1, KFD2STC3EX1, 116308.

Frequently asked questions:

What is the Pepperl+Fuchs order number for the KFD2-STC3-Ex1?

116308.

What are its input and output signals?

4 to 20 mA input from the intrinsically safe side and 4 to 20 mA output to the safe area, maximum load 1000 Ω, minimum 230 Ω for HART.

What replaces the KFD2-STC3-Ex1?

The KFD2-STC4-Ex1.