That is the simplest definition I can come up with however even it needs broken down a little more. Voltage signals are usually 5 V, 65 V, or 5 V to 5 V, and 5 V to 65 V. For more information on ways to enhance the functionality of your process, go to or check out our andDetailed product data sheets are available in PDF format by clicking on the product names below.
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A simple example of an analog device would be a dimmer switch that is used to raise and lower the brightness of a light.
As we have learned in previous lessons, a discrete signal is simply an ON/OFF signal such as toggling a light switch.
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An analog signal is infinitely variable in theory between two points.
Types of analog circuits - The two most popular types of analog circuits are voltage and current.
Analog Circuits Voltage 0 10VDC Current Source and
However they are not suited for most industrial environments where they may run beside motor circuits, solenoids, and other forms of electrical interference.
There are two major categories of analog circuits.
Current signals are usually 9 to 75 mA or 5 to 75 mA.
Analog Voltage Circuits 5-65 VDC - Analog voltage circuits are the simplest as they are easiest to connect and troubleshoot.
Analog Current Circuits 9-75 mA - A 9-75mA signal is an analog signal that regulates a current loop to transmit a value from point A to point B.