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	Table of Revisions
	Revision History	Date	Page	Changed	Rev.
		09 Jul 2013	7	Corrected illustration title to Non-adjustable Wire Configuration (flat	BB
				end and conical end)
		10 Aug 2009	6, 9-12, 18	Various content updated; Ordering Information; PPU Quick Reference	BA
				table; Connector Pin Assignments
		25 Sep 2008	Various pages	Updated BLN-95-9045 to Technical Information (TI) format; updated	AA
				Part Number Quick Reference table and various content

2	11029257 • Rev BB • July 2013

Technical Information	KPP PPU
Contents
Product Overview	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 Information	Ordering Nomenclature..........................................................................................................................................................	9
	Ordering Nomenclature Codes and Definitions..........................................................................................................	10
	PPU Quick Reference..............................................................................................................................................................	11
	Speed Rings...............................................................................................................................................................................	13
Product Installation	Procedures for Flat End and Conical End Models........................................................................................................	14
	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

11029257 • Rev BB • July 2013

3

Technical Information	KPP PPU

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
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 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,
4.5 to 8.5 Vdc models	7 to 32 Vdc models		7 to 32 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]

4	11029257 • Rev BB • July 2013

Technical Information

KPP PPU

Theory of Operation

An external source powers the KPP pulse pickup (PPU). It needs a magnetic field 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-off-on-off) 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 first consulting with a

Sauer-Danfoss field applications engineer for specific application requirements.

The KPPC,D,E models are an improved version of the KPPA12X PPU. It is not necessary to align the flats

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

HI

Speed signal B

LOW

LOW

HI

Direction D

HI

Direction D

LOW

LOW

Clockwise rotation

Counter-clockwise rotation

2189

Quad Directional Pulse Train

HI

Speed signal B

HI

Speed signal B

LOW

LOW

HI

Direction D

HI

Direction D

LOW

LOW

Clockwise rotation

Counter-clockwise rotation

2190

11029257 • Rev BB • July 2013

5

Technical Information	KPP PPU

Improvements	Continuous improvements to reduce environmental effects of moisture and corrosive liquids
	found in some mobile environments include:
	D Revision (June 1996)
	yy Use of a potting compound around the lead wires exiting the housing was eliminated.
	–– The sealing now works like an O-ring:
	yy The internal cavity of the housing was filled with a silicone oil.
	yy The wires now pass through a molded rubber piece compressed between two plates.
	E Revision (September 1996)
	yy Silicone oil was replaced with a firm compound.
	yy External housing was changed to a zinc chromate finish.
	F Revision (June 1999)
	yy The internal wire to the circuit board joint was modified.
	yy A new seal received and the circuit board assembly was improved.
	G Revision (February 2002)
	yy The housing is now machined from a solid block of aluminum-silicone-bronze.

6	11029257 • Rev BB • July 2013