Pepperl+Fuchs
Pepperl+Fuchs KFD2-SRA-Ex4 – 4-Channel Switch Amplifier
Pepperl+Fuchs KFD2-SRA-Ex4 – 4-Channel Switch Amplifier
Manufacturer part number: KFD2-SRA-Ex4
Price on Availability (POA)
Contact us for pricing, availability and lead times.
ENQUIRE NOWProduct Overview
The Pepperl+Fuchs KFD2-SRA-Ex4 is a 4-channel isolated barrier switch amplifier for transferring digital signals from hazardous areas to the safe area. It accepts NAMUR sensors or dry contacts and provides four relay contact outputs in a single 20 mm wide K-System module.
Pepperl+Fuchs 2:1 technology lets two field devices share one pair of field wires, reducing field wiring by up to 50 %. The module is supplied at 24 V DC via the Power Rail or terminals, offers line fault detection and a reversible mode of operation, and its inputs are ATEX and IECEx certified for Ex ia applications.
Key Features
- Manufacturer: Pepperl+Fuchs
- Model: KFD2-SRA-Ex4
- Product type: 4-Channel Switch Amplifier
- 4-channel isolated barrier in one 20 mm module
- Inputs for NAMUR sensors or dry contacts
- 2:1 technology — up to 50 % less field wiring
- 4 relay contact outputs
- 24 V DC supply via Power Rail or terminals
- Line fault detection (LFD)
- Reversible mode of operation
Technical Specifications
| Manufacturer | Pepperl+Fuchs |
|---|---|
| Part number | KFD2-SRA-Ex4 |
| Product type | 4-channel isolated barrier / switch amplifier |
| Signal type | Digital input |
| Rated supply voltage | 19 … 30 V DC (Power Rail or terminals 14+, 15-) |
| Rated current | 45 … 70 mA |
| Power dissipation | 1.2 W |
| Inputs | NAMUR to EN 60947-5-6 or dry contact (terminals 1–6) |
| Line fault detection | Breakage I ≤ 0.15 mA, short circuit I > 6 mA |
| Outputs | 4 × relay (terminals 7–12) |
| Contact loading | 253 V AC / 2 A / cos φ > 0.7; 40 V DC / 2 A resistive |
| Switching frequency | ≤ 10 Hz (non-AC operation), ≤ 3 Hz (AC operation) |
| Ambient temperature | -20 … 60 °C |
| Degree of protection | IP20 |
| Dimensions | 20 x 119 x 115 mm (W x H x D), housing type B2 |
| Mass | approx. 150 g |
| Mounting | 35 mm DIN mounting rail (EN 60715) |
| ATEX | ZELM 99 ATEX 0009 — II (1)G [Ex ia Ga] IIC, II (1)D [Ex ia Da] IIIC, I (M1) [Ex ia Ma] I |
| IECEx | IECEx TUN 04.0003 |
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
- High channel-count digital input systems
- Valve position feedback with two sensors per valve
- Reducing field cabling in retrofit projects
- NAMUR sensor interfacing to PLC/DCS
Installation and Compatibility
DIN rail mounting with 24 V DC from the Power Rail or terminals 14+/15-. 2:1 operation is set by DIP switch; see the manual for the required field circuit arrangement. Relay outputs connect to terminals 7–12. Follow the certificate and manual for intrinsically safe loop design.
Frequently Asked Questions
What is the Pepperl+Fuchs KFD2-SRA-Ex4?
The Pepperl+Fuchs KFD2-SRA-Ex4 is a 4-channel isolated barrier switch amplifier for transferring digital signals from hazardous areas to the safe area. It accepts NAMUR sensors or dry contacts and provides four relay contact outputs in a single 20 mm wide K-System module.
What supply does the KFD2-SRA-Ex4 need?
19 … 30 V DC (Power Rail or terminals 14+, 15-).
How do I get a price for the KFD2-SRA-Ex4?
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-SRA-Ex4 datasheet (PDF)
- KFD2-SRA-Ex4 on the Pepperl+Fuchs website (certificates, manuals and drawings)
Related Products
- Pepperl+Fuchs KFD2-SR2-Ex2.W – Isolated Barrier Switch Amplifier
- Pepperl+Fuchs KCD2-SR-Ex2 – Isolated Barrier Switch Amplifier
- 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-SRA-Ex4. 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.