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FIGURE 2.82 Classification and Types of Sensors 91
Sinking (NPN)
parallel sensor
arrangement.
FIGURE 2.83 Blocking diodes.
feedback (or reverse polarity) when one of the sensors in parallel is
damped while the other is undamped. Figure 2.83 demonstrates the
use of blocking diodes in this type of parallel connection.
2.9.6.2 Series-Connection Logic—AND Function
Figure 2.84 shows AND function logic indicating that the series-con-
nected devices must be ON (1) in order for the series-connected cir-
cuit to be ON.
FIGURE 2.84 Series AND logic.
