Fundamental PLC Logic level Inputs
Figure 6 shows a typical logic input level typical role of a logic gate or a microprocessor or microcontroller. Logic inputs are versatile they are linked to many types of devices, contact closure as a pullup resistor is included. (All products Industrologic inputs have a logical high-level pull-up resistor.)
Inputs with logic level can also be used by other devices of similar voltage logic level (usually 5 volts.) This is possible, even with a high-pull-up resistor if not a source of power is not the driving signal can fall It All are trained on the ground. (more…)
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