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• Prices or price categories of proximity sensors © Festo Didactic GmbH & Co. KG • FP 1110 10. Connection and circuit technology 10.1
Types of connection 10.1.1 Two-wire DC and AC technology
Proximity sensors in two-wire technology have only two connecting wires. They are
connected in series to the load to be switched and thus receive their supply voltage
via the load. This has the effect of a certain amount of residual current flowing via
the load even if the output is closed, and that of a voltage drop over the proximity
sensor in the switched through status.
Proximity sensors are designed with either "normally closed" contacts (N/C) or
"normally open" (N/O) contacts, but designs are also available which incorporate
the two functions. BN(1)
BU(3) Operating voltage (V) V V V V Load (L) Fig. 10.1.1: Connection diagrams for two-wire technology (DC, AC and DC/AC (universal current) – designs) © Festo...
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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