Serviceline Industrial Sensors
Serviceline Explosion Protection

Rotation Speed Monitor KFU8-DW-1.D

  • Speed monitoring up to 40 kHz
  • 1 pre-select value with relay output and LED indicator
  • 2-, 3-, 4-wire and NAMUR sensors as well as rotary encoder connectable
  • Start-up delay
  • Menu driven operation via 4 front keys
  • Period measurement
  • Output signal can be inverted
  • Display devices can be set between 0.1 ... 2.5 sec.

Please note: All product-related documents, such as certificates, declarations of conformity, etc., which were issued prior to the conversion under the name Pepperl+Fuchs GmbH or Pepperl+Fuchs AG, also apply to Pepperl+Fuchs SE.

Download the complete datasheet as a PDF:

Datasheet excerpt: Technical data of  KFU8-DW-1.D

Product Description
Rotation Speed Monitor
Functional safety related parameters
MTTFd100 a
Rated voltage200 ... 230 V AC ; 100 … 130 V AC; 50/60 Hz
20 VDC ... 30 VDC
Fusingexternal fusing 4 A
Power consumptionAC: < 5 VA
DC: < 5 W
Input 1
Connectionterminals 8-, 9+
Connectable sensor typesNAMUR sensors according to DIN EN 60947-5-6
Open loop voltage8.2 V DC
Short-circuit current6.5 mA
Switching point1.2 ... 2.1 mA Switching hysteresis approx. 0.2 mA
Input frequency0.002 ... 10000 Hz, pulse length/duration: ≥ 20µs
Impedance1.2 kΩ
Input 2
Switching pointhigh: 16 ... 30 V DC; max.10 mA due to integrated constant current sink; Ri ≅ 3 kΩ
low: 0 ... 6 V DC
Input frequency0.002 ... 40000 Hz, pulse length/duration: ≥ 12µs
Connectionterminals 7+, 13- sensor supply
terminals 14, 15 NPN/PNP input (galvanically isolated)
Connectable sensor types2-, 3-, or 4-wire proximity sensor, incremental rotary encoder, or externally generated pulses 16 ... 30 V
Sensor supply19 ... 28 V DC non-stabilised; ≤ 30 mA short-circuit protected
Input 3
Start-up overrideTriggering by external signal 16 ... 30 V or Place jumper between terminals 2/3 or by switching on supply voltage (terminal 2 and terminal 3 permanently bridged)
Hold-up time0.1 ... 999.9 s (External trigger signal)
Relay1 changeover contact
Sensor supply24 V DC ± 10 %, 30 mA , short-circuit protected
Contact loading250 V AC/2 A/ cos φ ≥ 0.7
40 V DC/2 A
Delay≤ 20 ms (incl. calculation time)
Mechanical life≥ 30.000.000 switching cycles
Transfer characteristics
Changing interval5 ms (Internal processing time)
Time delay before availability≤ 400 ms
Measuring error0 ... 40000 Hz: ≤ ±0,10%
Display: ±1 digit
Timer functionON-delay, OFF-delay, one shot, pulse extension
Time0 ... 999.9 s ; mode of operation reversible
Standard conformity
Electromagnetic compatibilityacc. to EN 50081-2 / EN 50082-2
Ambient conditions
Ambient temperature-25 ... 40 °C (-13 ... 104 °F)
Storage temperature-40 ... 85 °C (-40 ... 185 °F)
Relative humiditymax. 80 %, not condensing
Altitude0 ... 2000 m
Operating conditionsThe device has only to be used in an indoor area.
Mechanical specifications
Connection assemblyCaution: Please be aware that the device may only be connected to a switchable power supply. The switch or circuit breaker must be easy to reach and identified as the separator for the device.
Degree of protectionIP20
Connectioncoded, removable terminals , max. core cross section 0.34 ... 2.5 mm2
Construction typemodular terminal housing in Makrolon, System KF
For use in the switch cabinet/switch cabinet module
Mountingsnap-on to 35 mm standard rail or screw fixing


ECLASS 13.027210904
ECLASS 12.027210904
ECLASS 11.027210904
ECLASS 10.0.127210904
ECLASS 9.027210904
ECLASS 8.027210904
ECLASS 5.127210904
ETIM 9.0EC002918
ETIM 8.0EC002918
ETIM 7.0EC002918
ETIM 6.0EC002918
ETIM 5.0EC002475
UNSPSC 12.139121007

Details: KFU8-DW-1.D

Product Documentation: KFU8-DW-1.D

Language Selection:
ManualsLanguageFile TypeFile Size
Manual KFU8-DW-1.DENGPDF1046 KB
ManualENGPDF3685 KB

Design / Simulation: KFU8-DW-1.D

Language Selection:
CADLanguageFile TypeFile Size
CAE EPLAN Data Portal / CAE EPLAN Data PortalALLLINK---

Approvals: KFU8-DW-1.D

Language Selection:
CertificatesCertificate No.LanguageFile TypeFile Size
Canada, USA CSA cUL80078445ALLPDF57 KB
Declaration of Conformity
EU Declaration of Conformity (P+F) / EU-Konformitäterklärung (P+F)DOC-1838CALLPDF117 KB
UK Declaration of Conformity (P+F) / UK-Konformitäterklärung (P+F)DOC-6863ALLPDF107 KB