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Unformatted text preview: se. In this case, the supply of compressed air required
for the switches is already available and a conversion of the switch output into an
electrical value is not necessary. 2.2.4 Examples of application stroke Fig. 2.2.2: Reversing of a double-acting cylinder by means of adjustable position sensors 32 © Festo Didactic GmbH & Co. KG • FP 1110 2. Mechanical position switches Fig. 2.2.3: Auxiliary function for lifting of thin workpieces 2.3
Exercises Exercise 2.1 Protective circuits for electro-mechanical limit switches
Describe the different types of load which can occur with the connection of a limit
switch. You do not need to take into account mixed types of load. Indicate the
different options of protective circuits. Exercise 2.2 Switching with low electrical power
A limit switch is to be used for switching very low power. The voltage is approx.
5 V DC, the current is less than 1 mA. At this level even the smallest amounts of dirt
on the contacts can to lead to faults. Suggest a circuit, which overcomes this
problem. © Festo Didactic GmbH & Co. KG • FP 1110 33 34 © Festo Didactic GmbH & Co....
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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