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Specification & Description
| Specification | Description |
|---|---|
| Part Number | KFA6-DWB-EX1.D |
| Alternative Part Number | KFA6DWBEX1D |
| Manufacturer | Pepperl + Fuchs |
| Rotation Speed Monitoring Range | 0.001 to 5000 Hz |
| Supply Voltage | 230 V AC +/- 10% |
| Power Consumption | ≤ 2 VA |
| Input Type | Dual-channel with one intrinsically safe input for 2-wire NAMUR sensors and one standard input |
| Output Type | Two relay contact outputs |
| Contact Loading | 250 V AC / 2 A / cos ϕ ≥ 0.7 ; 40 V DC / 2 A |
| Mechanical Life | 5 x 10^7 switching cycles |
| Accuracy | 0.1% of measured value, > 0.001 Hz |
| Ambient Temperature Range | -20 to 60 °C |
| Protection Degree | IP20 |
| Dimensions | 40 x 100 x 115 mm |
| Mounting | 35 mm DIN mounting rail according to EN 60715 |
| Directive Conformity | Directive 94/9 EC, EN 50014, EN 50020 |
| Electromagnetic Compatibility | Directive 89/336/EC, EN 61326, EN 50081-2, EN 50082-2 |
| Commodity Code | 853710 |
The Pepperl + Fuchs KFA6-DWB-EX1.D Rotation Speed Monitor is a sophisticated device designed to ensure the reliable monitoring of rotational speeds in industrial settings. This one-channel isolated barrier is engineered for intrinsic safety applications, providing a crucial function in the detection of overspeed or underspeed conditions. It is adept at handling discrete signals from hazardous areas, such as those from NAMUR sensors or mechanical contacts, and compares the input frequency against a user-programmed reference frequency.
With an input frequency range of 1 mHz to 5 kHz, the KFA6-DWB-EX1.D is versatile and can cater to a wide array of industrial applications. The unit features two relay contact outputs to signal any deviation from the set parameters, ensuring prompt and effective responses to potential issues. Additionally, the device is equipped with a start-up override function that can set relay outputs to user-defined default conditions for up to 1,000 seconds, adding an extra layer of operational flexibility.
Ease of programming is a key feature of this monitor, with a user-friendly keypad located on the front of the unit allowing for straightforward configuration. Line fault detection is clearly indicated by a red LED and relay, providing immediate visual feedback on the integrity of field circuit connections.
Designed to accommodate up to SIL 2 according to IEC/EN 61508 / IEC/EN 61511 standards, the KFA6-DWB-EX1.D is a reliable component for functional safety in process control systems. Its robust construction and meticulous design make it suitable for a range of industrial environments, ensuring consistent performance and safety in monitoring rotational machinery.
Commonly Asked Questions
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Frequently Asked Questions
What is the function of the Rotation Speed Monitor?
The Rotation Speed Monitor is designed to monitor the rotational speed of machinery, ensuring that the speed does not exceed or drop below a certain threshold. It compares the input frequency from a sensor against a user-defined reference frequency and signals an overspeed or underspeed condition through its relay contact outputs.
Can this device be used in safety-related applications?
Yes, the Rotation Speed Monitor is suitable for use in functional safety-related applications. It is developed, manufactured, and tested according to relevant safety standards to ensure reliable operation in such environments.
What types of sensors can be connected to the Rotation Speed Monitor?
The device is compatible with 2-wire sensors following the EN 60947-5-6 (NAMUR) standard. It can monitor the binary signals from these sensors to detect overspeed or underspeed conditions.
How is the device configured?
Configuration of the device is done via a keypad located on the front panel. The keypad allows for setting up the required safety functions and securing the configuration with a password to prevent unauthorized changes.
What is the supply voltage required for the Rotation Speed Monitor?
The Rotation Speed Monitor requires a rated voltage of 230 V AC +/- 10% for its operation.
What is the maximum switching power of the output contacts?
The output contacts of the Rotation Speed Monitor can handle a contact loading of 253 V AC at 2 A with a power factor of cos ϕ ≥ 0.7, or 40 V DC at 2 A for resistive loads.
What are the ambient operating conditions for the device?
The device is designed to operate within an ambient temperature range of -20 to 60 °C, ensuring reliable performance in various industrial environments.
How can I ensure the device is functioning correctly?
Regular proof testing is recommended to verify the correct functionality of the device. This involves simulating input signals and observing the output behaviour to ensure that the device responds as expected.
What should be done if the device needs maintenance or repair?
In the event of a fault, the device should not be repaired on-site. It must only be repaired by the manufacturer to ensure the integrity of the safety functions. If a defect occurs, the device should be replaced with an original unit from the manufacturer.
What is the useful lifetime of the Rotation Speed Monitor?
The useful lifetime of the device is dependent on the operating conditions, particularly temperature. However, it is generally expected to be within the range of 8 to 12 years, with the possibility of extension if ambient conditions are favourable and maintenance guidelines are followed.
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