MAKING MODERN LIVING POSSIBLE
Technical Information
Speed Sensor
KPP Pulse Pickup (PPU)
powersolutions.danfoss.com
Technical Information |
KPP PPU |
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Revision |
Table of Revisions |
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Revision History |
Date |
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Changed |
Rev. |
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09 Jul 2013 |
7 |
Corrected illustration title to Non-adjustable Wire Configuration (flat |
BB |
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end and conical end) |
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10 Aug 2009 |
6, 9-12, 18 |
Various content updated; Ordering Information; PPU Quick Reference |
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table; Connector Pin Assignments |
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25 Sep 2008 |
Various pages |
Updated BLN-95-9045 to Technical Information (TI) format; updated |
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Part Number Quick Reference table and various content |
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2 |
11029257 • Rev BB • July 2013 |
Technical Information |
KPP PPU |
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Contents |
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Product Overview |
Description................................................................................................................................................................................... |
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Features......................................................................................................................................................................................... |
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Technical Data............................................................................................................................................................................. |
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Theory of Operation................................................................................................................................................................. |
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Improvements............................................................................................................................................................................ |
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D Revision (June 1996)....................................................................................................................................................... |
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E Revision (September 1996)........................................................................................................................................... |
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F Revision (June 1999)........................................................................................................................................................ |
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G Revision (February 2002).............................................................................................................................................. |
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Dimensions.................................................................................................................................................................................. |
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Considerations............................................................................................................................................................................ |
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Supply Voltage..................................................................................................................................................................... |
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Directional versus Non-directional KPPs.................................................................................................................... |
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Housings................................................................................................................................................................................. |
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4-wire KPP.............................................................................................................................................................................. |
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Ordering Information |
Ordering Nomenclature.......................................................................................................................................................... |
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Ordering Nomenclature Codes and Definitions.......................................................................................................... |
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PPU Quick Reference.............................................................................................................................................................. |
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Speed Rings............................................................................................................................................................................... |
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Product Installation |
Procedures for Flat End and Conical End Models........................................................................................................ |
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Procedure A ........................................................................................................................................................................ |
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Procedure B:......................................................................................................................................................................... |
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Procedure C......................................................................................................................................................................... |
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Procedure D......................................................................................................................................................................... |
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Procedure E.......................................................................................................................................................................... |
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Installation Diagrams............................................................................................................................................................. |
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System Wiring Guidelines..................................................................................................................................................... |
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Connector Pin Assignments................................................................................................................................................ |
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Troubleshooting Steps.......................................................................................................................................................... |
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11029257 • Rev BB • July 2013 |
3 |
Technical Information |
KPP PPU |
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Product Overview
Description 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.
Features
Technical Data
yy Choice of directional or non-directional devices
yy Choice of Delphi/Packard Weather-Pack®, Turck Eurofast® or Deutsch® connectors
yy Rugged housing designed to withstand extreme environments
yy You can order pre-mounted in Sauer-Danfoss pumps and motors
yy You can use with digital or analog controllers
yy Suitable for zero speed measurements
Electrical and Environmental Data
Electrical
Supply voltage (two ranges)
Regulated 4.5 to 8.5 Vdc |
Battery 7 to 32 Vdc |
Maximum operating current |
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20 mA at 1 Hz and 5 Vdc supply |
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Required current |
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12 mA at 5 Vdc (no load) |
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Output voltage in high state |
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Supply voltage minus 0.5 Vdc minimum (no load)
Output voltage in low state
0.5 Vdc, maximum (no load)
Maximum frequency
15 kHz
Load
15 kΩ to both ground and supply
Peak transient voltage
80 Vdc for 2 milliseconds, |
300 Vdc for 2 milliseconds, |
200 Vdc for 100 milliseconds, |
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4.5 to 8.5 Vdc models |
7 to 32 Vdc models |
7 to 32 Vdc models |
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Peak reverse voltage |
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-15 Vdc continuous, 4.5 to 8.5 Vdc models |
-32 Vdc continuous, 7 to 32 Vdc models |
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Environmental |
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Operating and storage temperature |
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-40° to 110° C [-40° to 230° F] |
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4 |
11029257 • Rev BB • July 2013 |
Technical Information |
KPP PPU |
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Theory of Operation |
An external source powers the KPP pulse pickup (PPU). It needs a magnetic field to pass by its Hall |
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switch(s) to provide a speed signal. The speed ring on the cylinder block has alternately magnetized |
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north and south segments. For the non-directional PPU (KPPX12X), when a north segment is above |
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the Hall switch, the switch output voltage is high, and when a south segment is above the switch, |
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output is low. The digital (on-off-on-off) pulse train feeds to a controller, that interprets its rate of |
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change as a speed. |
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The direction-sensing PPU (KPPA13X) uses two Hall sensors mounted side-by-side in the same case. |
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With proper orientation, the pulse train output from one sensor leads the other sensor by 90°. A logic |
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circuit decodes the two signals to give a direction indication at the speed output (high or low |
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depending on direction). For quadrature directional signal, the logic is bypassed and the direction |
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signal is phase shifted by a nominal of 90° from the signal A. Refer to Directional Pulse Train, on this |
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page below. |
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Do not attempt to apply a quadrature output PPU without first consulting with a |
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Sauer-Danfoss field applications engineer for specific application requirements. |
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The KPPC,D,E models are an improved version of the KPPA12X PPU. It is not necessary to align the flats |
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on its housing with the speed ring for proper speed readings. |
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Refer to Typical Speed Control, page 13, as an example of a simple closed-loop speed control |
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application for the PPU. Connections for a three and four-wire application, refer to Connection |
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Diagram, page 17. |
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The KPPXN8Nnn divides the standard signal output by two. |
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Directional Pulse Train |
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HI |
Speed signal B |
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HI |
Speed signal B |
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LOW |
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LOW |
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HI |
Direction D |
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HI |
Direction D |
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LOW |
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LOW |
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Clockwise rotation |
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Counter-clockwise rotation |
2189 |
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Quad Directional Pulse Train |
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HI |
Speed signal B |
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HI |
Speed signal B |
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LOW |
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LOW |
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HI |
Direction D |
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HI |
Direction D |
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LOW |
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LOW |
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Clockwise rotation |
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Counter-clockwise rotation |
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2190 |
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11029257 • Rev BB • July 2013 |
5 |
Technical Information |
KPP PPU |
|
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Improvements |
Continuous improvements to reduce environmental effects of moisture and corrosive liquids |
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found in some mobile environments include: |
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D Revision (June 1996) |
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yy Use of a potting compound around the lead wires exiting the housing was eliminated. |
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–– The sealing now works like an O-ring: |
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yy The internal cavity of the housing was filled with a silicone oil. |
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yy The wires now pass through a molded rubber piece compressed between two plates. |
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E Revision (September 1996) |
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yy Silicone oil was replaced with a firm compound. |
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yy External housing was changed to a zinc chromate finish. |
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F Revision (June 1999) |
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yy The internal wire to the circuit board joint was modified. |
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yy A new seal received and the circuit board assembly was improved. |
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G Revision (February 2002) |
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yy The housing is now machined from a solid block of aluminum-silicone-bronze. |
6 |
11029257 • Rev BB • July 2013 |