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Unformatted text preview: esistance is
sufficiently great so that the maximum permissible switching current of the
proximity sensor is not exceeded. Provided this requirement is met, the polarity of
the supply voltage can be exchanged without causing any damage.
It should be noted that particularly during testing, a sensor can easily be damaged if
the load output BK (4) is accidentally short-circuited to terminal BU (3). © Festo Didactic GmbH & Co. KG • FP 1110 255 16. Solutions Exercise 3.3 Resolution of a reed proximity sensor
The minimum possible stroke that can be detected for a cylinder fitted with two reed
proximity sensors is calculated by:
Hmin = 2 ⋅ Hmax
Hmax is the maximum hysteresis of the cylinder switch combination.
The relevant values can be taken from table 16.2.1. The value for a Festo cylinder of
type DNNZ with a diameter of 32 mm, fitted with a reed switch (SME) is
Hmax = 2.5 mm. This results in a minimum possible stroke of 5 mm. 16.3
Solutions to exercises
from Chapter 4 Exercise 4.1 Application of an inductive proximity sensor
The number of p...
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This note was uploaded on 11/01/2012 for the course CHEMICAL 102 taught by Professor Jamesrodriguez during the Spring '12 term at Universidad Politécnica de Cartagena.
- Spring '12