Pepperl+Fuchs
Pepperl+Fuchs KFD2-STC4-Ex1 – SMART Transmitter Power Supply
Pepperl+Fuchs KFD2-STC4-Ex1 – SMART Transmitter Power Supply
Manufacturer part number: KFD2-STC4-Ex1
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ENQUIRE NOWProduct Overview
The Pepperl+Fuchs KFD2-STC4-Ex1 is a 1-channel isolated barrier SMART transmitter power supply. It powers 2-wire and 3-wire SMART transmitters (and accepts 2-wire SMART current sources) in the hazardous area and repeats the 0/4 … 20 mA signal to the safe area for PLC, DCS or indicator inputs.
Digital HART communication is transferred bi-directionally, and terminals with test points simplify commissioning and loop checks. The module runs from 24 V DC via the Power Rail, its input is certified [Ex ia] under ATEX and IECEx, and it is suitable for applications up to SIL 2 to IEC/EN 61508.
Key Features
- Manufacturer: Pepperl+Fuchs
- Model: KFD2-STC4-Ex1
- Product type: SMART Transmitter Power Supply
- 1-channel isolated barrier
- Supplies 2-wire and 3-wire SMART transmitters
- Accepts 2-wire SMART current sources
- 0/4 … 20 mA output
- HART signals transferred bi-directionally
- Terminals with test points
- Up to SIL 2 to IEC/EN 61508
Technical Specifications
| Manufacturer | Pepperl+Fuchs |
|---|---|
| Part number | KFD2-STC4-Ex1 |
| Product type | 1-channel SMART transmitter power supply / isolated barrier |
| Signal type | Analogue input |
| Rated supply voltage | 20 … 35 V DC (Power Rail or terminals 14+, 15-) |
| Power consumption | 1.8 W |
| Input signal | 0/4 … 20 mA |
| Available voltage | ≥ 16 V at 20 mA (terminals 1+, 3) |
| Output signal | 0/4 … 20 mA (overload > 25 mA) |
| Load | 0 … 800 Ω at 20 mA |
| Deviation | ≤ 10 µA at 20 °C |
| HART bandwidth | 0 … 7.5 kHz (-3 dB), field to control side |
| Functional safety | SIL 2 (IEC/EN 61508) |
| Ambient temperature | -20 … 60 °C |
| Degree of protection | IP20 |
| Dimensions | 20 x 124 x 115 mm (W x H x D), housing type B2 |
| Mass | approx. 200 g |
| Mounting | 35 mm DIN mounting rail (EN 60715) |
| ATEX | BAS 99 ATEX 7060 X — II (1)G [Ex ia Ga] IIC, II (1)D [Ex ia Da] IIIC, I (M1) [Ex ia Ma] I; TÜV 99 ATEX 1499 X — II 3G Ex nA II T4 |
| IECEx | IECEx BAS 04.0016X, IECEx CML 15.0055X |
Specifications are taken from Pepperl+Fuchs manufacturer data. Always confirm critical values — particularly hazardous-area and functional-safety data — against the current datasheet, certificates and instruction manual before installation.
Applications
- Pressure, level and flow transmitters in Ex zones
- HART-enabled instrument loops
- Analogue input marshalling for PLC/DCS
- SIL 2 measurement loops
Installation and Compatibility
DIN rail mounting with 24 V DC from the Power Rail or terminals 14+/15-. Connect 2-wire transmitters to terminals 1+/3, 3-wire transmitters to 1+/2-/3, or current sources to 5-/6+. The 0/4–20 mA output is on terminals 7-/8+. Check loop parameters (Uo 25.4 V, Io 86.8 mA, Po 551 mW for terminals 1+/3-) against the field device certificate.
Frequently Asked Questions
What is the Pepperl+Fuchs KFD2-STC4-Ex1?
The Pepperl+Fuchs KFD2-STC4-Ex1 is a 1-channel isolated barrier SMART transmitter power supply. It powers 2-wire and 3-wire SMART transmitters (and accepts 2-wire SMART current sources) in the hazardous area and repeats the 0/4 … 20 mA signal to the safe area for PLC, DCS or indicator inputs.
What supply does the KFD2-STC4-Ex1 need?
20 … 35 V DC (Power Rail or terminals 14+, 15-).
How do I get a price for the KFD2-STC4-Ex1?
This product is sold on a price on availability basis. Use the enquiry form on this page with your quantity and application details and the Valves UK team will reply with pricing and lead time.
Technical Documentation
- Pepperl+Fuchs KFD2-STC4-Ex1 datasheet (PDF)
- KFD2-STC4-Ex1 on the Pepperl+Fuchs website (certificates, manuals and drawings)
Related Products
- Pepperl+Fuchs KFD2-STC4-Ex2 – 2-Channel SMART Transmitter Power Supply
- Pepperl+Fuchs KFD2-STC5-Ex1 – SMART Transmitter Power Supply
- View the full Pepperl+Fuchs range at Valves UK
Price and Availability
Price on Availability (POA)
Contact Valves UK for pricing, product availability and technical enquiries regarding the Pepperl+Fuchs KFD2-STC4-Ex1. Please include your required quantity and any relevant application details when submitting your enquiry.
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This product is supplied on a price on availability (POA) basis. Complete the form below and the Valves UK team will reply with pricing, availability and technical support.