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Unformatted text preview: 4.3.3 Numerical designation to EN 50 044
This differentiates between polarised and non-polarised proximity sensors.
For non-polarised proximity sensors, terminals 3 and 4 have the normally open
contact function and terminals 1 and 2 the normally closed function. For polarised
proximity sensors for direct current with two terminals, the positive terminal must be
identified with 1, the negative terminal with number 3. Number 4 is for the normally
open contact function and number 2 for the normally closed function. 14.4
proximity sensors 218 The designs for inductive proximity sensors are laid down in European standards.
Many manufacturers offer all of these design types as well as their own designs
which differ from these standards. Standard EN 50 008 specifies the dimensions for
cylindrical proximity sensors (design A). In addition, the minimum values for nominal
switching distances and switching frequencies which must be achieved are indicated
below. © Festo Didactic GmbH & Co. KG • FP 1110 14. Standards and protection classes 1 d3 d1 d2 2 l3 m sn m
l2 Calibrating pla...
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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