Considerations; Supply Voltage; Directional Versus Non-Directional Kpps; Housings - Danfoss KPP Pulse Pickup Technical Information

Technical Information

Ordering Information

Considerations

8
KPP PPU
When specifying the pulse pickup there are important considerations listed below. For KPP
selection see Ordering Nomenclature, page 9 and

Supply Voltage

You cannot power most KPP models directly from a battery because of the voltage transients
(voltage spikes above 15 Vdc) that may cause permanent damage. Battery voltage transients are a
common occurrence with 12 or 24 Vdc systems.
Most mobile systems have an alternator that helps ensure a given voltage level but does not
prevent against voltage transients. Therefore you must use a separate voltage regulator as the
voltage source for the majority of KPP models.
Those applications using a microcontroller can utilize their 5 Vdc regulated power supply to
power the KPP models that are rated 4.5 to 8.5 Vdc. It is acceptable when powering the 4.5 to 8.5
Vdc models to use a regulated 15 Vdc maximum.

Directional versus Non-directional KPPs

When sensing speed only and supplying the KPP directly from the battery, always specify a KPP
model that is rated 7 to 32 Vdc. If you require directional sensing, ensure the supply voltage is
regulated.

Housings

There are two basic housings flat end and conical end. Refer to Dimensions, page 7.

4-wire KPP

The 4-wire KPP can be used when only speed sensing is required. For these applications connect
to pins A, B, C. Fill the unused cavity (D) with a cavity plug (refer to
Configuration (flat end), page 7). Use the cavity plug offered in the 4 pin mating electrical
connector kit, which is used with the 4 pin Delphi/Packard Weather-Pack connector (Sauer-
Danfoss part umber K03379).
11029257 • Rev BB • July 2013
Part Number Quick Reference, pages 11 to 12.
Common Lead Wire