Pepperl+Fuchs
Pepperl+Fuchs KFA5-SR2-Ex2.W – Switch Amplifier (115 V AC)
Pepperl+Fuchs KFA5-SR2-Ex2.W – Switch Amplifier (115 V AC)
Manufacturer part number: KFA5-SR2-Ex2.W
Price on Availability (POA)
Contact us for pricing, availability and lead times.
ENQUIRE NOWProduct Overview
The Pepperl+Fuchs KFA5-SR2-Ex2.W is a 2-channel isolated barrier switch amplifier designed for installations with a 115 V AC supply. It transfers digital signals from NAMUR sensors or dry contacts in hazardous areas to two relay contact outputs, maintaining reinforced galvanic isolation between input, output and supply circuits.
Line fault detection identifies lead breakage and short circuits on the field wiring, the mode of operation is reversible via DIP switches, and the module is suitable for applications up to SIL 2 to IEC/EN 61508 / IEC/EN 61511. It is a practical choice where control panels are AC powered rather than fed from a 24 V DC Power Rail.
Key Features
- Manufacturer: Pepperl+Fuchs
- Model: KFA5-SR2-Ex2.W
- Product type: Switch Amplifier (115 V AC)
- 2-channel isolated barrier
- 115 V AC supply (103.5 … 126 V AC, 45 … 65 Hz)
- Inputs for NAMUR sensors or dry contacts
- 2 relay contact outputs
- 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-Ex2.W |
| Product type | 2-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 | max. 1.3 W |
| Inputs | NAMUR to EN 60947-5-6 or dry contact; approx. 8 V DC / 8 mA |
| Line fault detection | Breakage I ≤ 0.1 mA, short circuit I > 6 mA |
| Outputs | 2 × relay (terminals 7, 8, 9 and 10, 11, 12) |
| 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
- AC-powered control panels interfacing Ex-area switches
- Limit switch and valve position signals
- Level switch alarms
- SIL 2 safety loops
Installation and Compatibility
DIN rail mounting in the safe area with 115 V AC supply on terminals 14 and 15 (this model does not use the Power Rail for supply). Field devices connect to terminals 1–6 and relay outputs to terminals 7–12. Configure via DIP switches and follow the certificate and manual for intrinsically safe wiring.
Frequently Asked Questions
What is the Pepperl+Fuchs KFA5-SR2-Ex2.W?
The Pepperl+Fuchs KFA5-SR2-Ex2.W is a 2-channel isolated barrier switch amplifier designed for installations with a 115 V AC supply. It transfers digital signals from NAMUR sensors or dry contacts in hazardous areas to two relay contact outputs, maintaining reinforced galvanic isolation between input, output and supply circuits.
What supply does the KFA5-SR2-Ex2.W need?
103.5 … 126 V AC, 45 … 65 Hz (terminals 14, 15).
How do I get a price for the KFA5-SR2-Ex2.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-Ex2.W datasheet (PDF)
- KFA5-SR2-Ex2.W on the Pepperl+Fuchs website (certificates, manuals and drawings)
Related Products
- Pepperl+Fuchs KFA5-SR2-Ex1.W – Switch Amplifier (115 V AC)
- Pepperl+Fuchs KFA6-SR2-Ex2.W – Switch Amplifier (230 V AC)
- 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-Ex2.W. Please include your required quantity and any relevant application details when submitting your enquiry.
Share
Request a Quotation
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.