Danfoss KPP PPU User guide
MAKING MODERN LIVING POSSIBLE
Technical Information
Speed Sensor
KPP Pulse Pickup (PPU)
powersolutions.danfoss.com
Technical Information KPP PPU
Revision
Revision History
Table of Revisions
Date Page Changed Rev.
09 Jul 2013 7 Corrected illustration title to Non-adjustable Wire Conguration (at
end and conical end)
10 Aug 2009 6, 9-12, 18 Various content updated; Ordering Information; PPU Quick Reference
table; Connector Pin Assignments
25 Sep 2008 Various pages Updated BLN-95-9045 to Technical Information (TI) format; updated
Part Number Quick Reference table and various content
BB
BA
AA
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Technical Information KPP PPU
Contents
Product Overview
Ordering Information
Product Installation Procedures for Flat End and Conical End Models ....................................................................................................... 14
Description .................................................................................................................................................................................. 4
Features ........................................................................................................................................................................................ 4
Technical Data ............................................................................................................................................................................ 4
Theory of Operation ................................................................................................................................................................ 5
Improvements ............................................................................................................................................................................ 6
D Revision (June 1996) ...................................................................................................................................................... 6
E Revision (September 1996) .......................................................................................................................................... 6
F Revision (June 1999) ....................................................................................................................................................... 6
G Revision (February 2002) .............................................................................................................................................. 6
Dimensions .................................................................................................................................................................................. 7
Considerations ........................................................................................................................................................................... 8
Supply Voltage ..................................................................................................................................................................... 8
Directional versus Non-directional KPPs ................................................................................................................... 8
Housings ................................................................................................................................................................................. 8
4-wire KPP .............................................................................................................................................................................. 8
Ordering Nomenclature ......................................................................................................................................................... 9
Ordering Nomenclature Codes and Denitions .......................................................................................................... 10
PPU Quick Reference ............................................................................................................................................................. 11
Speed Rings ............................................................................................................................................................................... 13
Procedure A ........................................................................................................................................................................ 14
Procedure B: ........................................................................................................................................................................ 14
Procedure C ......................................................................................................................................................................... 15
Procedure D ........................................................................................................................................................................ 15
Procedure E ......................................................................................................................................................................... 15
Installation Diagrams ............................................................................................................................................................. 16
System Wiring Guidelines .................................................................................................................................................... 17
Connector Pin Assignments................................................................................................................................................ 18
Troubleshooting Steps .......................................................................................................................................................... 18
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Technical Information KPP PPU
Product Overview
Description
Features
The KPP pulse pickup accepts a supply voltage and, in response to the speed of a permanently
magnetized speed ring on the motor’s cylinder block or shaft, outputs a digital pulse signal. The
output changes its high/low state as the north and south poles of the speed ring pass by the sensor’s
face. Because the output is digital, the KPP is ideal for low-speed measurement.
The KPP is designed for rugged outdoor, mobile, or heavy industrial speed-sensing applications that
do not allow contact with the rotating shaft. It is custom-designed for Sauer-Danfoss pumps and
motors.
y Choice of directional or non-directional devices
y Choice of Delphi/Packard Weather-Pack®, Turck Eurofast® or Deutsch® connectors
y Rugged housing designed to withstand extreme environments
y You can order pre-mounted in Sauer-Danfoss pumps and motors
y You can use with digital or analog controllers
y Suitable for zero speed measurements
Technical Data
Electrical and Environmental Data
Electrical
Supply voltage (two ranges)
Regulated 4.5 to 8.5 Vdc Battery 7 to 32 Vdc
Maximum operating current
20 mA at 1 Hz and 5 Vdc supply
Required current
12 mA at 5 Vdc (no load)
Output voltage in high state
Supply voltage minus 0.5 Vdc minimum (no load)
Output voltage in low state
0.5 Vdc, maximum (no load)
Maximum frequency
15 k Hz
Load
15 kΩ to both ground and supply
Peak transient voltage
80 Vdc for 2 milliseconds,
4.5 to 8.5 Vdc models
Peak reverse voltage
-15 Vdc continuous, 4.5 to 8.5 Vdc models -32 Vdc continuous, 7 to 32 Vdc models
Environmental
Operating and storage temperature
-40° to 110° C [-40° to 230° F]
300 Vdc for 2 milliseconds,
7 to 32 Vdc models
200 Vdc for 100 milliseconds,
7 to 32 Vdc models
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Technical Information KPP PPU
Speed signal B
2190
Theory of Operation
An external source powers the KPP pulse pickup (PPU). It needs a magnetic eld to pass by its Hall
switch(s) to provide a speed signal. The speed ring on the cylinder block has alternately magnetized
north and south segments. For the non-directional PPU (KPPX12X), when a north segment is above
the Hall switch, the switch output voltage is high, and when a south segment is above the switch,
output is low. The digital (on-o-on-o) pulse train feeds to a controller, that interprets its rate of
change as a speed.
The direction-sensing PPU (KPPA13X) uses two Hall sensors mounted side-by-side in the same case.
With proper orientation, the pulse train output from one sensor leads the other sensor by 90°. A logic
circuit decodes the two signals to give a direction indication at the speed output (high or low
depending on direction). For quadrature directional signal, the logic is bypassed and the direction
signal is phase shifted by a nominal of 90° from the signal A. Refer to Directional Pulse Train, on this
page below.
Do not attempt to apply a quadrature output PPU without rst consulting with a
Sauer-Danfoss eld applications engineer for specic application requirements.
The KPPC,D,E models are an improved version of the KPPA12X PPU. It is not necessary to align the ats
on its housing with the speed ring for proper speed readings.
Refer to Typical Speed Control, page 13, as an example of a simple closed-loop speed control
application for the PPU. Connections for a three and four-wire application, refer to Connection
Diagram, page 17.
The KPPXN8Nnn divides the standard signal output by two.
Directional Pulse Train
HI
Speed signal B
LOW
HI
Direction D
Clockwise rotation Counter-clockwise rotation
LOW
Quad Directional Pulse Train
HI
Speed signal B
LOW
HI
Direction D
LOW
Clockwise rotation Counter-clockwise rotation
HI
Speed signal B
LOW
HI
Direction D
LOW
HI
LOW
HI
Direction D
LOW
2189
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Technical Information KPP PPU
Improvements Continuous improvements to reduce environmental eects of moisture and corrosive liquids
found in some mobile environments include:
D Revision (June 1996)
y Use of a potting compound around the lead wires exiting the housing was eliminated.
– The sealing now works like an O-ring:
y The internal cavity of the housing was lled with a silicone oil.
y The wires now pass through a molded rubber piece compressed between two plates.
E Revision (September 1996)
y Silicone oil was replaced with a rm compound.
y External housing was changed to a zinc chromate nish.
F Revision (June 1999)
y The internal wire to the circuit board joint was modied.
y A new seal received and the circuit board assembly was improved.
G Revision (February 2002)
y The housing is now machined from a solid block of aluminum-silicone-bronze.
11029257 • Rev BB • July 20136
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