Pepperl+Fuchs
Pepperl+Fuchs KFA5-SR2-Ex1.W – Switch Amplifier (115 V AC)
Pepperl+Fuchs KFA5-SR2-Ex1.W – Switch Amplifier (115 V AC)
Manufacturer part number: KFA5-SR2-Ex1.W
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ENQUIRE NOWProduct Overview
The Pepperl+Fuchs KFA5-SR2-Ex1.W is a 1-channel isolated barrier switch amplifier for 115 V AC powered installations. It reads a NAMUR sensor or dry contact located in a hazardous area and switches a relay contact output in the safe area, with reinforced galvanic isolation between input, output and supply.
The unit provides line fault detection, a reversible mode of operation selected by DIP switch, and suitability for applications up to SIL 2 to IEC/EN 61508 / IEC/EN 61511. Its intrinsically safe input is certified under ATEX and IECEx for Ex ia applications.
Key Features
- Manufacturer: Pepperl+Fuchs
- Model: KFA5-SR2-Ex1.W
- Product type: Switch Amplifier (115 V AC)
- 1-channel isolated barrier
- 115 V AC supply (103.5 … 126 V AC)
- Input for NAMUR sensors or dry contacts
- Relay contact output
- Line fault detection (LFD)
- Reversible mode of operation
- Up to SIL 2 to IEC/EN 61508 / IEC/EN 61511
Technical Specifications
| Manufacturer | Pepperl+Fuchs |
|---|---|
| Part number | KFA5-SR2-Ex1.W |
| Product type | 1-channel isolated barrier / switch amplifier |
| Signal type | Digital input |
| Rated supply voltage | 103.5 … 126 V AC, 45 … 65 Hz (terminals 14, 15) |
| Power consumption | 1 W |
| Input | NAMUR to EN 60947-5-6 or dry contact (terminals 1+, 2+, 3-) |
| Line fault detection | Breakage I ≤ 0.1 mA, short circuit I > 6 mA |
| Output | 1 × relay (terminals 7, 8, 9) |
| Contact loading | 253 V AC / 2 A / cos φ > 0.7; 126.5 V AC / 4 A; 40 V DC / 2 A resistive |
| Switching frequency | < 10 Hz |
| Functional safety | SIL 2 (IEC/EN 61508 / IEC/EN 61511) |
| 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 | PTB 00 ATEX 2081 — II (1)G [Ex ia Ga] IIC, II (1)D [Ex ia Da] IIIC, I (M1) [Ex ia Ma] I |
| IECEx | IECEx PTB 11.0031 |
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
- Single-point switching signals from Ex zones in AC-powered panels
- Valve position feedback
- Level and limit switch alarms
- SIL 2 safety loops
Installation and Compatibility
DIN rail mounting with 115 V AC supply on terminals 14/15. Connect the field device to terminals 1+, 2+, 3- and the relay output to terminals 7, 8, 9. Configure with the front DIP switches and follow the certificate and instruction manual for intrinsically safe loops.
Frequently Asked Questions
What is the Pepperl+Fuchs KFA5-SR2-Ex1.W?
The Pepperl+Fuchs KFA5-SR2-Ex1.W is a 1-channel isolated barrier switch amplifier for 115 V AC powered installations. It reads a NAMUR sensor or dry contact located in a hazardous area and switches a relay contact output in the safe area, with reinforced galvanic isolation between input, output and supply.
What supply does the KFA5-SR2-Ex1.W need?
103.5 … 126 V AC, 45 … 65 Hz (terminals 14, 15).
How do I get a price for the KFA5-SR2-Ex1.W?
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 KFA5-SR2-Ex1.W datasheet (PDF)
- KFA5-SR2-Ex1.W on the Pepperl+Fuchs website (certificates, manuals and drawings)
Related Products
- Pepperl+Fuchs KFA5-SR2-Ex2.W – Switch Amplifier (115 V AC)
- Pepperl+Fuchs KFD2-SR2-Ex1.W – 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 KFA5-SR2-Ex1.W. Please include your required quantity and any relevant application details when submitting your enquiry.
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