Pepperl+Fuchs KFD2-DWB-Ex1D Rotation Speed Monitor (49542S)

The Pepperl+Fuchs KFD2-DWB-Ex1.D is a 1-channel intrinsically safe rotation speed monitor designed to monitor overspeed and underspeed conditions from NAMUR sensors or mechanical contacts installed in hazardous areas. The unit provides isolated signal processing, programmable alarm thresholds, and relay outputs for machinery protection and process monitoring applications.

Key Features

• 1-channel isolated barrier
• Rotation speed monitoring
• Overspeed and underspeed detection
• NAMUR sensor or dry contact input
• 2 relay outputs
• Configurable via front keypad
• Start-up override function
• Line fault detection (LFD)
• SIL 2 capable
• DIN rail mounting
• Intrinsically safe hazardous-area interface

Specifications

• Manufacturer: Pepperl+Fuchs
• Model: KFD2-DWB-Ex1.D
• Part Number: 49542S
• Type: Rotation Speed Monitor / Isolated Barrier
• Supply Voltage: 20–30 VDC
• Input Type:
  • NAMUR sensor
  • Mechanical contact
• Input Frequency Range: 1 mHz to 5 kHz
• Outputs: 2 relay contacts
• Relay Rating:
  • Up to 253 VAC, 2 A
  • Up to 40 VDC, 2 A
• Functional Safety: SIL 2
• Mounting: 35 mm DIN Rail
• Protection Rating: IP20
• Operating Temperature: -20°C to +60°C
• Ex II (1) G [EEX ia] IIC TUV 99 ATEX 1408 

Function

The KFD2-DWB-Ex1.D continuously monitors shaft, motor, conveyor, pump, fan, and turbine speeds by measuring pulse signals from a connected NAMUR sensor or contact. User-configurable alarm thresholds allow the device to trigger relay outputs when speed falls below or exceeds preset limits, helping protect equipment from damage and unexpected process conditions.

Typical Applications

• Conveyor monitoring
• Pump protection
• Fan speed monitoring
• Turbine monitoring
• Motor speed supervision
• Packaging machinery
• Process automation systems
• Hazardous area instrumentation
• Safety shutdown systems

Condition

Used industrial surplus. Removed from a working environment. Please review all photographs carefully for condition, model number, and included accessories.

Contact

We have a wide range of industrial items such as pressure transmitters, temperature transmitters, flow meters, and loads more!

MSTAK Contact Number: 07915071899

MSTAK Email: mdalrymple@stakam.co.uk

Quantity

We have 3 total units available, all near new condition.