Overview
The PEPPERL+FUCHS KFD2-VR4-Ex1.26 is an isolated barrier module designed for intrinsic safety applications. It enables safe transmission of vibration sensor signals from hazardous areas to control systems in safe zones. Moreover, it supports both 2-wire and 3-wire sensors, supplying the correct voltage or current for reliable operation.
This voltage repeater ensures accurate signal acquisition from accelerometers, including Bently Nevada vibration sensors, while maintaining functional safety according to SIL 2 standards. Its compact design allows installation in space-constrained industrial control panels.
Key Features and Functional Highlights
- Sensor Power Supply: Provides 3.6 mA, 5.3 mA, or 8.9 mA for 2-wire sensors and 18 V/20 mA for 3-wire sensors.
- Intrinsic Safety: Isolates hazardous area signals, protecting equipment and personnel.
- Galvanic Isolation: Safe voltage isolation with a rated insulation of 50 V AC and 375 V peak.
- High Accuracy: DC transfer error <10 mV, AC error ±5 mV, temperature influence <100 ppm/K.
- Compact DIN Rail Mounting: 35 mm EN 60715 compatible, saving panel space.
In addition, the module supports fast signal transmission with minimal time delay (7.1 ±0.3 µs), ensuring precise monitoring of vibration signals.
Technical Data
| Parameter | Specification |
|---|---|
| Model | KFD2-VR4-Ex1.26 |
| Type | Voltage Repeater / Isolated Barrier |
| Signal Type | Analog Input |
| SIL Rating | SIL 2 |
| Rated Voltage | 19–30 V DC |
| Power Consumption | Max 1.6 W |
| Power Dissipation | Max 1.2 W |
| Input Resistance | 10 kΩ |
| Output Resistance | 24 Ω typical, 27 Ω max |
| Transmission Range | –20 … 0 V |
| Cut-off Frequency | 10 kHz (-0.1 dB), 20 kHz (-1 dB) |
| Time Delay | 7.1 ±0.3 µs |
| Ripple | <3 mVrms (20 kHz), <20 mVrms (200 kHz) |
| Operating Temperature | –20°C to +60°C |
| Protection Degree | IP20 |
| Dimensions (W x H x D) | 20 x 119 x 115 mm |
| Mass | 125 g |
| Mounting | 35 mm DIN rail |
Typical Applications and System Integration
The KFD2-VR4-Ex1.26 integrates seamlessly into industrial systems for intrinsic safety monitoring. Common applications include:
- Vibration monitoring of motors, pumps, and turbines in hazardous areas
- Safe connection of Bently Nevada accelerometers to control systems
- Isolation and protection of signal paths from hazardous voltage or environmental conditions
- Use in SIL-rated safety control loops
For instance, installing this repeater allows safe 2-wire or 3-wire sensor operation while maintaining accurate signal transmission in explosive atmospheres.
Details
| Weight | 0.125 kg |
|---|
Reviews
There are no reviews yet.