In this case, we're talking about an input circuit.Ī logic circuit is defined as an electric circuit (I/O) whose output is a function of the input. Examples of loads are light bulbs and motors. This is the opposite of a power source, such as a battery or generator, which produces power. In this case, I/O describes the signal communication between two devices (such as a PLC and a stepper driver) using on/off binary logic.Īn electrical load is an electrical component or portion of a circuit that consumes electric power. It could be a keyboard (input) and a monitor (output). I/O is defined as inputs/outputs, which in its simplest terms, is anything that executes an output based on an input.
A DC power source flows from positive to negative. A digital electronic circuit uses DC voltage and discrete values (on/off). It requires a voltage and ground, where ground acts as earth to measure the potential voltage. These are connected by conductive wires or traces on a PCB. TerminologyĪn electronic circuit contains electronic components, such as resistors, transistors, capacitors, inductors and/or diodes. What does sink logic and source logic really mean? Let's start with some basic terminology. Most of the time, tech support engineers will direct you to a wiring diagram and advise you to follow it. How can you be sure that you're talking apples to apples? For example, is a sourcing logic the same as a PNP logic? "Are we sinking or taking a sinked source?" In our experience supporting motion control applications, we've heard it all. The difficulty starts when engineers or manufacturers use different wiring terminology. I still get that nervous feeling before I press the START button on a demo. If devices are not wired correctly, it can cause a range of issues from a motor simply not doing what's expected to irreversible product damage.
For someone who has never had experience wiring I/O for motion control, it can be scary the first time.
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