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Specification & Description
| Specification | Description |
|---|---|
| Part Number | KFA6-SR2-EX1.W |
| Alternative Part Number | KFA6SR2EX1W |
| Manufacturer | Pepperl + Fuchs |
| Supply Voltage | 207 ... 253 V AC, 45 ... 65 Hz |
| Power Loss | 1 W |
| Power Consumption | ≤ 1 W |
| Signal Type | Digital Input |
| Input Connection | Terminals 1+, 2+, 3- |
| Rated Values | Acc. to EN 60947-5-6 (NAMUR) |
| Open Circuit Voltage | Approx. 8 V DC |
| Short-Circuit Current | Approx. 8 mA |
| Switching Point/Hysteresis | 1.2 ... 2.1 mA / Approx. 0.2 mA |
| Line Fault Detection | Breakage I ≤ 0.1 mA, Short-Circuit I > 6 mA |
| Pulse/Pause Ratio | ≥ 20 ms / ≥ 20 ms |
| Output Connection | Terminals 7, 8, 9 |
| Output Signal | Relay |
| Contact Loading | 253 V AC/2 A/cos φ > 0.7; 126.5 V AC/4 A/cos φ > 0.7; 40 V DC/2 A resistive load |
| Energised/De-energised Delay | Approx. 20 ms / Approx. 20 ms |
| Mechanical Life | 10^7 switching cycles |
| Switching Frequency | < 10 Hz |
| Electrical Isolation | Input/Output reinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 Veff |
| Ambient Temperature | -20 ... 60 °C (-4 ... 140 °F) |
| Degree of Protection | IP20 |
| Dimensions | 20 x 119 x 115 mm (0.8 x 4.7 x 4.5 in), housing type B2 |
| Mounting | On 35 mm DIN mounting rail acc. to EN 60715:2001 |
| EC-Type Examination Certificate | PTB 00 ATEX 2081 |
| Approvals | ¬ II (1)G [Ex ia Ga] IIC, ¬ II (1)D [Ex ia Da] IIIC, ¬ I (M1) [Ex ia Ma] I |
| Input | Ex ia |
| Voltage Uo | 10.6 V |
| Current Io | 19.1 mA |
| Power Po | 51 mW (linear characteristic) |
| Maximum Safe Voltage Um | 253 V AC (Attention! Um is no rated voltage.) |
The Pepperl + Fuchs KFA6-SR2-EX1.W is a high-quality switch amplifier designed to facilitate the safe and efficient transfer of digital signals from hazardous areas to safe areas. This one-channel isolated barrier is equipped with a 230 V AC supply and is compatible with both dry contact and NAMUR inputs. It features a relay contact output and is capable of line fault detection (LFD), enhancing operational reliability.
This switch amplifier is engineered to support a reversible mode of operation, allowing for flexibility in signal processing. The robust design ensures a mechanical life of 10^7 switching cycles, making it a durable choice for industrial applications. With a compact footprint of 20 x 119 x 115 mm, it is designed for easy mounting on a 35 mm DIN rail, ensuring a straightforward installation process.
The device is also suitable for use in safety-related applications, with a capability of up to SIL2 according to IEC 61508/IEC 61511 standards. The KFA6-SR2-EX1.W is meticulously crafted to provide reinforced insulation between input, output, and power supply, ensuring a high degree of electrical safety and compliance with international standards.
Ideal for a variety of industrial settings, this switch amplifier is a reliable component for system integrators and engineers looking to maintain signal integrity and safety in challenging environments.
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Frequently Asked Questions
What is the purpose of the Switch Amplifier?
The Switch Amplifier is designed for intrinsic safety applications, transferring digital signals from hazardous areas to safe areas. It's commonly used to interface NAMUR sensors or mechanical contacts with control systems.
Can this device be used with both AC and DC signals?
The device is primarily designed for use with a 230 V AC supply. It is capable of switching both AC and DC loads at the output, with specific ratings for resistive loads provided in the technical specifications.
Is the Switch Amplifier suitable for use in explosive environments?
Yes, the device has certifications for use in potentially explosive atmospheres, making it suitable for applications in hazardous areas.
What type of input signal does the device accept?
The device accepts digital input signals, compatible with dry contact or NAMUR sensors, which are commonly used for detecting the presence or absence of an object.
How does the device indicate operational status?
The device features LED indicators for power supply, output status, and line fault detection, providing visual feedback on the operational status.
What is the ambient temperature range for the operation of the Switch Amplifier?
The device can operate within an ambient temperature range of -20 to 60 °C, making it suitable for a variety of industrial environments.
What is the significance of the line fault detection feature?
Line fault detection is a safety feature that monitors the field circuit for open circuits or short circuits, ensuring the integrity of the connection to the hazardous area.
How can the mode of operation be changed on the device?
The mode of operation can be reversed using an onboard switch, allowing flexibility in configuring the device according to the specific needs of the application.
What certifications does the Switch Amplifier hold?
The device holds several international certifications, including ATEX, IECEx, FM, UL, and CSA, ensuring compliance with global safety standards.
What is the mechanical life expectancy of the device's relay contacts?
The relay contacts in the device have a mechanical life expectancy of 10^7 switching cycles, indicating a long service life under typical operating conditions.
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