Omron PLC Center

Let’s see how the input circuits of a contract plc. This will give us a better understanding of how we should bind. Bad things can happen when we get them wrong wire?

Typically, DC-input modules are available that can work with 5, 12, 24 and 48 volts. Make sure you buy what your needs the input devices that you will use it.

We’ll first see how the DC input of labor. The DC input modules allow us to get in touch is PNP (sourcing) or NPN (sinking) transistor-like devices to them. If you use a normal toggle switch (or push button, etc.), generally do not care if you wire as NPN or PNP. We must note that most of the PLC will not let us mix NPN and PNP devices on the module itself when using a sensor (photo-eye, prox, etc) that we do, but must be on their output care-configuration. Always check whether it is PNP or NPN. (Check with the manufacturer if it is safe)

The difference between the two is whether the load (in our case, the PLC is the load), activated from the ground or positive voltage. NPN has a sensor on the load on the ground, while a PNP device is switched on the load on the positive voltage.

diagram below is what lower than the output NPN and PNP sensors seem. (more…)

Tags: automation, DC input, NPN sink, PLC DC input, PLC input, PLC input module, PLC interface, PLC training, PNP sourcingautomation, DC input, NPN sink, PLC DC input, PLC input, PLC input module, PLC interface, PLC training, PNP sourcing

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